Loading…

Protocol - Ocular Exposure to Ultraviolet Light

Add to Toolkit

Protocol Name from Source:

The Expert Review Panel has not reviewed this measure yet.

Availability:

Publicly available

Description:

The interviewer-administered questionnaire consists of three parts: (1) cities and exposure periods, (2) exposure periods during a typical work week, and (3) leisure/non-work period sunlight exposure. Answers are recorded on an answer sheet and UV-B exposure is calculated using a SAS program.

Protocol:

Instructions to Interviewer:

Start with PART I. Put all cities and exposure periods on one answer sheet. Use additional sheets, if necessary.

Unless otherwise noted, all questions refer to the corresponding column on the answer sheet.

When you have completed Part I for all cities/towns, return to top of first answer sheet and begin with PART II. Ask PARTS II and III for each exposure period on your answer sheet.

Explanation to the Participant/Interviewee:

In this study we are studying how sunlight influences eye diseases. I would like to ask you some questions about how much sunlight you have been exposed to at different times in your adult life, particularly during the non-winter months. To help you remember your exposure to sunlight at different times in your life, I will first ask you about where you have lived, starting with where you were living when you were 18 years old, and then about your activities in each of these places. I will also be asking you to estimate the number of hours you spent outside in direct sunlight. We want to concentrate on just the months of April through September and the peak sun times of 10 AM through 4 PM. You may choose not to answer some or all of my questions. The information we are asking for is important to the study. It will remain confidential like all other information that we have about you.

PART I: CITIES AND EXPOSURE PERIODS

A. In what city or town were you living when you were 18?

[For subsequent cities/towns...] To what city or town did you move to next?

B. What year did you turn 18?

[For subsequent cities/towns, record response to C from previous city/town]

C. What year did you move from (CITY/TOWN)?

D. What was your main daytime activity or job when you turned 18?

[For subsequent daytime activities or jobs within a city/town...] What was your new daytime activity or job?

[For subsequent cities/towns...] What was your main daytime activity or job when you first moved to (CITY/TOWN)?

E.[Record year turned 18]

[For subsequent daytime activities or jobs within a city/town, record answer to F. from previous daytime activity or job and go to [If 'NO'] below]

[For subsequent cities/towns, record answer to B.]

F. When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM?

[If 'YES', record answer to C. and go to A. above]

[If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]

[ASK PARTS II. AND III. FOR EACH EXPOSURE PERIOD ON YOUR ANSWER SHEET]

PART II: EXPOSURE DURING TYPICAL WORK WEEK

G. When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM? Please exclude time spent in a car or in other transportation.

Less than 1 hour: Record '0' and go to PART III below

Less than 3 hours: Skip to question I.

H. Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat? (N=No, Y=Yes)

I. During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?

[ ] 1 never

[ ] 2 less than half time

[ ] 3 half the time

[ ] 4 more than half the time

[ ] 5 all the time

J. During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight? [If answer is "All the time," skip to PART III below.]

[ ] 1 never

[ ] 2 less than half time

[ ] 3 half the time

[ ] 4 more than half the time

[ ] 5 all the time

K. How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?

[ ] 1 never

[ ] 2 less than half time

[ ] 3 half the time

[ ] 4 more than half the time

[ ] 5 all the time

PART III - LEISURE/NON-WORK PERIOD SUNLIGHT EXPOSURE

L. Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM? Again, exclude time spent in a car or in other transportation.

Less than 1 hour: Record '0' and continue with next city/town or exposure period

Less than 3 hours: Skip to question N.

M. Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming? (N=No, Y=Yes)

N. During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?

[ ] 1 never

[ ] 2 less than half time

[ ] 3 half the time

[ ] 4 more than half the time

[ ] 5 all the time

O. During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight? [If answer is "All the time," skip to next city/town or exposure period.]

[ ] 1 never

[ ] 2 less than half time

[ ] 3 half the time

[ ] 4 more than half the time

[ ] 5 all the time

P. How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?

[ ] 1 never

[ ] 2 less than half time

[ ] 3 half the time

[ ] 4 more than half the time

[ ] 5 all the time

Answer Sheet:

[[SUNEXP51_answersheet.jpg|Answer Sheet]] [[.nl]]

Scoring Procedures The following procedures are used to convert an individual's responses to estimate that individual's Ultraviolet light exposure:

SAS code used for analysis:

Variable Name:

Variable Label:

Wehours

workday exposure hours

Wewater

workday exposure over water

Wehat

workday exposure hat

Wesungl

workday exposure sunglasses

Weglass

workday exposure glasses

Lehours

leisure exposure hours

Lewater

leisure exposure over water

Lehat

leisure exposure hat

Lesungl

leisure exposure sunglasses

Leglass

leisure exposure glasses

Regno

regno

ID

dummy ID number

Zzlink

linking variable

Yearbeg

exposure beginning (yr)

Yearend

exposure end (yr)

Citytown

city/town of exposure

Stcntry

state/county of exposure

proc sort data = anl.sunlocat out = locat; by regno zzlink; run;

proc sort data = anl.sunactiv out = activ; by regno zzlink; run;

data sun_anl1;

merge locat activ;

by regno zzlink;

array cvar $20. c1-c10;

array svar $20. s1-s10;

center = substr(regno,1,2);

if center = '62' then center = '55';

month=month(zzentdat);

year=year(zzentdat);

yrmo=year*100+month;

if stcntry = 'ALASKA' then lf = 0.3;

if stcntry = 'MAINE' or stcntry = 'MINNESOTA' or

stcntry = 'NEW HAMPSHIRE' or stcntry = 'VERMONT' or

stcntry = 'WISCONSIN' then lf = 0.8;

if stcntry = 'CONNECTICUT' or stcntry = 'DELAWARE' or

stcntry = 'MASSACHUSETTS' or stcntry = 'NEW YORK' or

stcntry = 'NORTH DAKOTA' or stcntry = 'OHIO' or stcntry = 'OREGON' or

stcntry = 'PENNSYLVANIA' or stcntry = 'RHODE ISLAND' or

stcntry = 'WASHINGTON' or stcntry = 'WEST VIRGINIA' then lf = 0.9;

if stcntry = 'DIST OF COLUMBIA' or stcntry = 'DC' or stcntry = 'HAWAII' or

stcntry = 'ILLINOIS' or stcntry = 'INDIANA' or stcntry = 'IOWA' or

stcntry = 'KENTUCKY' or stcntry = 'MARYLAND' or stcntry = 'MONTANA' or

stcntry = 'NEW JERSEY' or stcntry = 'SOUTH DAKOTA' then lf = 1.0;

if stcntry = 'MISSOURI' or stcntry = 'TENNESSEE' or

stcntry = 'VIRGINIA' then lf = 1.1;

if stcntry = 'ARKANSAS' or stcntry = 'IDAHO' or stcntry = 'NEBRASKA' or

stcntry = 'NORTH CAROLINA' then lf = 1.2;

if stcntry = 'ALABAMA' or stcntry = 'GEORGIA' or stcntry = 'KANSAS' or

stcntry = 'LOUISIANA' or stcntry = 'MISSISSIPPI' or

stcntry = 'MICHIGAN' or stcntry = 'OKLAHOMA' or

stcntry = 'SOUTH CAROLINA' or stcntry = 'WYOMING' then lf = 1.3;

if stcntry = 'COLORADO' or stcntry = 'TEXAS' then lf = 1.4;

if stcntry = 'UTAH' then lf = 1.5;

if stcntry = 'CALIFORNIA' or stcntry = 'FLORIDA'

or stcntry = 'NEVADA' then lf = 1.6;

if stcntry = 'ARIZONA' or stcntry = 'NEW MEXICO' then lf = 1.7;

do i = 1 to 10;

cvar[i] = substr(citytown,1,i);

svar[i] = substr(stcntry,1,i);

end;

if (length(stcntry) <> 0 and lf = .) then do;

if s2 = 'AN' then lf = 0.1;

if s3 = 'ALU' then lf = 0.3;

if s5 = 'GREEN' or s2 = 'IC' then lf = 0.4;

if stcntry = 'ALASKA TO FRANC' then lf = 0.5;

if s2 = ' E' or s2 = 'AB' or s3 = 'ALG' or s6 = 'AUSTRI' or

s4 = 'BELG' or s2 = 'CE' or s2 = 'CI' or s2 = 'CZ' or s2 = 'DE' or

s2 = 'EN' or s4 = 'ESTO' or s2 = 'EU' or s3 = 'FIN' or s3 = 'FRA' or

s3 = 'GER' or s4 = 'GREA' or s5 = 'GREEC' or s3 = 'HOL' or

s2 = 'HU' or s3 = 'IRE' or s2 = 'IT' or s2 = 'LA' or

s3 = 'LIT' or s5 = 'N. AT' or s3 = 'N.A' or s3 = 'NET' or

s4 = 'NORM' or s8 = 'NORTH AT' or s6 = 'NORTHE' or s4 = 'NORW' or

s3 = 'NOV' or s2 = 'PO' or s2 = 'RO' or s4 = 'S. E' or

s4 = 'S. G' or s4 = 'S. I' or s3 = 'SCO' or s3 = 'SIC' or

s7 = 'SOUTH G' or s7 = 'SOUTH W' or s2 = 'SP' or s3 = 'SWE' or

s3 = 'SWI' or s5 = 'THE N' or s8 = 'UNITED K' or s4 = 'W. G' or

s3= 'W.G' or s6 = 'WEST E' or s6 = 'WEST G' or s5 = 'WESTE'

then lf = 0.6;

if s3 = 'ALB' or s5 = 'CANAD' or s5 = 'CANAN' or s5 = 'MANIT' or

s3 = 'MON' or s4 = 'NEWF' or s3 = 'ONT' or s6 = 'QUEBEC'

then lf = 0.7;

if s5 = 'NEW E' or s3 = 'US/' or s5 = 'USA/E' or s5 = 'USA/I'

then lf = 0.8;

if stcntry = 'N. CAROLINATOEN' or s5 = 'NEW Y' or s3 = 'ORE' or

s3 = 'SCH' or s3 = 'VIR' or s3 = 'W.V' then lf = 0.9;

if s2 = 'AT' or s3 = 'BER' or s5 = 'CANAL' or s3 = 'CBI' or s3 = 'CHE' or

s3 = 'COA' or stcntry = 'COLORADO/KANSAS' or s3 = 'COR' or

s3 = 'CUR' or stcntry = 'D. C.' or stcntry = 'D.C.' or s4 = 'DIST' or

s2 = 'EA' or s5 = 'ERITA' or s2 = 'EV' or s3 = 'GEO' or s3 = 'HAW' or

stcntry = 'ISLAND' or s3 = 'MED' or s4 = 'MID-' or s3 = 'MIL' or

s2 = 'OC' or s4 = 'TEXA' or s4 = 'THEA' or s2 = 'U.' or

s8 = 'UNITED S' or s3 = 'UNK' or stcntry = 'USA' or s3 = 'VA,' or

s2 = 'WA' or s2 = 'WO' then lf = 1.0;

if s4 = 'MARY' or s4 = 'ON G' or s4 = 'TX, ' then lf = 1.1;

if s2 = 'IL' or s5 = 'MISSO' or stcntry = 'N. CAROLINA' or

s7 = 'NORTH C' or s6 = 'WEST C' then lf = 1.2;

if stcntry = 'ALABAMA/GEORGIA' or s2 = 'LO' or s5 = 'MIDWE' or

s4 = 'TX,G' then lf = 1.3;

if s3 = 'AFR' or s3 = 'CAM' or s2 = 'EG' or s5 = 'ERITR' or

s3 = 'FLA' or s5 = 'FLORI' or s3 = 'FR.' or s3 = 'GUI' or

s2 = 'KA' or s2 = 'KE' or s3= 'LIB' or s2 = 'LY' or s4 = 'MALT' or

s3 = 'MOR' or s5 = 'N. AF' or s3 = 'NIG' or s8 = 'NORTH AF' or

s4 = 'S. T' or s8 = 'SOUTH AF' or s10 = 'SOUTHERN S' or

s10 = 'SOUTHERN U' or s2 = 'SU' or s3 = 'SWA' or s3 = 'TAN' or

s2 = 'TO' or s4 = 'W. A' or s3 = 'W.A' or s2 = 'ZA' then lf = 1.4;

if s3 = 'CA ' or s5 = 'MISSI' or s4 = 'TEX ' then lf = 1.5;

if s3 = 'CAL' or s5 = 'FLORD' or s10 = 'SOUTHERN F' or s4 = 'USA,' or

s5 = 'USA/G' then lf = 1.6;

if stcntry = 'ALABAMA/JAPAN' then lf = 1.9;

if s4 = 'BELI' or s3 = 'COS' or s2 = 'EL' or s4 = 'GREN' or

s4 = 'GUAT' or s4 = 'HOND' or s3 = 'MEX' or s3 = 'NIC' or s3 = 'W.C'

then lf = 2.0;

if s3 = 'ARG' or s2 = 'BA' or s2 = 'BO' or s2 = 'BR' or s3 = 'CAR' or

s4 = 'CHIL' or s4 = 'COLU' or stcntry = 'CUBA' or s3 = 'DOM' or

s2 = 'EQ' or s2 = 'GA' or s3 = 'HAI' or s3 = 'JAM' or s3 = 'PAN' or

s2 = 'PR' or s2 = 'PU' or s8 = 'SOUTH AM' or s8 = 'SOUTH AT' or

s2 = 'TR' or s3 = 'VEN' or s4 = 'W. I' or s6 = 'WEST I' then lf = 2.2;

if s2 = 'AD' or s6 = 'AUSTRA' or s5 = 'DUTCH' or s3 = 'FIJ' or

s4 = 'GUAD' or stcntry = 'GUAM' or s8 = 'ISLAND O' or s4 = 'MARI' or

s4 = 'MARS' or s4 = 'MIDW' or s5 = 'NEW C' or s5 = 'NEW G' or

s5 = 'NEW Z' or s3 = 'PAA' or s3 = 'PAC' or s2 = 'PH' or

s4 = 'S. P' or s3 = 'S.P' or s3 = 'SAM' or s3 = 'SO ' or s3 = 'SO.' or

s3 = 'SOL' or s7 = 'SOUTH P' or s7 = 'SOUTH S' or s4 = 'SW P' or

s5 = 'THE P' then lf = 2.3;

if s3 = 'AFG' or s3 = 'ARA' or s2 = 'AS' or s4 = 'CHIN' or

s4 = 'ESTI' or s2 = 'FA' or s4 = 'HONG' or s2 = 'IN' or s3 = 'IRA' or

s3 = 'ISR' or s3 = 'JAP' or s2 = 'JE' or s2 = 'KO' or s4 = 'MALA' or

s4 = 'MIDD' or s3 = 'N.K' or s3 = 'NE ' or s3 = 'NOT' or s2 = 'OK' or

s4 = 'ON T' or s3 = 'ORI' or s3 = 'PAK' or s2 = 'PE' or s2 = 'RU' or

s4 = 'S. K' or s3 = 'SAI' or s3 = 'SAU' or s3 = 'SIN' or

s7 = 'SOUTH K' or s10 = 'SOUTHERN J' or s3 = 'TAI' or s3 = 'THA' or

s2 = 'TI' or s2 = 'TU' or s2 = 'UK' or s3 = 'USS' or s3 = 'VIE'

then lf = 2.5;

end;

if stcntry = ' ' and lf = . then do;

if c2 = 'AL' or c2 = 'IL' then lf = 0.3;

if c2 = 'EU' or c3 = 'GER' or c2 = 'IT' then lf = 0.6;

if c2 = 'HA' then lf = 0.9;

if c2 = 'AI' or c9 = 'ATLANTIC ' or c2 = 'EA' or c3 = 'MED' or

c2 = 'N.' or c5 = 'NORTH' or c7 = 'SOUTH H' or c3 = 'USA' or

c3 = 'WAS' then lf = 1.0;

if c5 = 'GREAT' then lf = 1.1;

if c2 = 'AC' or c3 = 'SEN' then lf = 1.4;

if c6 = 'SOUTHE' then lf = 1.6;

if c9 = 'ATLANTIC/' or c3 = 'CAR' or c7 = 'DUTCH W' or c3 = 'PAN' or

c7 = 'SOUTH A' or c3 = 'ST.' then lf = 2.2;

if c3 = 'GUA' or c4 = 'MARI' or c3 = 'MID' or c5 = 'NEW C' or

c3 = 'PAC' or c2 = 'PH' or c4 = 'S. P' or c3 = 'SOL' or

c7 = 'SOUTH P' or c5 = 'THE S' then lf = 2.3;

if c2 = 'BU' or c2 = 'CH' or c2 = 'JA' or c2 = 'KO' or c2 = 'OK' or

c2 = 'SA' then lf = 2.5;

end;

drop yearbeg yearend zzentr zzfrmver no_msval i

c1 c2 c3 c4 c5 c6 c7 c8 c9 c10 s1 s2 s3 s4 s5 s6 s7 s8 s9 s10;

run;

/*

proc print;

title NO CLEAR LOCATION;

var regno citytown stcntry;

run;

*/

data sun_anl2 (keep=regno site years oe_eff oe_nloc lf

zzentdat updtdate yrmo);

set sun_anl1;

years = (actend*1) - (actbeg*1); if years = 0 then years = 0.5;

hrsday = wehours*1;

if wewater = 'Y' then water = 1; else water = 0;

if wehat = '5' then hatday = 1;

else if wehat = '4' then hatday =.75;

else if wehat = '3' then hatday = .50;

else if wehat = '2' then hatday = .25;

else hatday = 0;

if wesungls = '5' then sunday = 1;

else if wesungls = '4' then sunday =.75;

else if wesungls = '3' then sunday = .50;

else if wesungls = '2' then sunday = .25;

else sunday = 0;

if weglass = '5' then glsday = 1;

else if weglass = '4' then glsday =.75;

else if weglass = '3' then glsday = .50;

else if weglass = '2' then glsday = .25;

else glsday = 0;

hrsleis = lehours*1;

if lewater = 'Y' then watleis = 1; else watleis = 0;

if lehat = '5' then hatleis = 1;

else if lehat = '4' then hatleis =.75;

else if lehat = '3' then hatleis = .50;

else if lehat = '2' then hatleis = .25;

else hatleis = 0;

if lesungls = '5' then sunleis = 1;

else if lesungls = '4' then sunleis =.75;

else if lesungls = '3' then sunleis = .50;

else if lesungls = '2' then sunleis = .25;

else sunleis = 0;

if leglass = '5' then glsleis = 1;

else if leglass = '4' then glsleis =.75;

else if leglass = '3' then glsleis = .50;

else if leglass = '2' then glsleis = .25;

else glsleis = 0;

oe_eff = years *

(((hrsday*.714*lf) * (water*1.9 + (1-water)) *

(hatday*0.53 + (1-hatday)) * (sunday*0.07 + (1-sunday)) *

(glsday*0.21 + (1-glsday))) +

((hrsleis*.286*lf) * (watleis*1.9 + (1-watleis)) *

(hatleis*0.53 + (1-hatleis)) * (sunleis*0.07 + (1-sunleis)) *

(glsleis*0.21 + (1-glsleis))));

oe_nloc = years *

(((hrsday*.714) * (water*1.9 + (1-water)) *

(hatday*0.53 + (1-hatday)) * (sunday*0.07 + (1-sunday)) *

(glsday*0.21 + (1-glsday))) +

((hrsleis*.286) * (watleis*1.9 + (1-watleis)) *

(hatleis*0.53 + (1-hatleis)) * (sunleis*0.07 + (1-sunleis)) *

(glsleis*0.21 + (1-glsleis))));

run;

Personnel and Training Required

The interviewer must be trained to conduct personal interviews with individuals from the general population. The interviewer must be trained and found to be competent (i.e., tested by an expert) at the completion of personal interviews. The interviewer should be trained to prompt respondents further if a "don't know" response is provided.

Equipment Needs

While the source instrument was developed to be administered in a non-computerized format (i.e. pencil and paper instrument), the PhenX Working Group acknowledges these questions can be administered by computer. Computer software is necessary to develop computer-assisted instruments. The interviewer will require a laptop computer/handheld computer to administer a computer-assisted questionnaire.

Requirements

Requirement CategoryRequired
Average time of greater than 15 minutes in an unaffected individualNo
Major equipmentNo
Specialized requirements for biospecimen collectionNo
Specialized trainingNo

Mode of Administration

Self-administered

Life Stage:

Adult

Specific Instructions:

None

Research Domain Information

Release Date:

February 26, 2010

Definition

Questions to assess adult lifetime ocular ultraviolet light (UV)-B exposure during the middle of the day (10am-4pm) over the northern hemisphere summer months (April-September).

Purpose

Ultraviolet light (UV)-B exposure is a very important environmental exposure in ophthalmology and for other phenotypes. It is particularly important in ophthalmology because UV-B rays can penetrate ocular tissues and directly effect intraocular structures such as the uveal tract and lens.

Selection Rationale

This protocol is comprehensive and logically assesses exposure based on geographical residence, workday functions and leisure activity.

UV exposure has UVA + UVB¿ + UVC components, with UVC representing the shortest rays. This instrument is weighted toward UVA + long UVB exposure. Some ocular diseases might be related to different components of the UV spectrum. The cornea can transmit all components of the UV spectrum. Investigators should be aware there is an inverse relation between short UVB / UVC and latitude due to ozone depletion. Note that UV exposure during the first 18 years is not addressed.

Language

English

Standards

StandardNameIDSource
Common Data Elements (CDE)Person Ocular UV Radiation Exposure Assessment3007673CDE Browser
Logical Observation Identifiers Names and Codes (LOINC)Ocular exposure UV light protocol62693-7LOINC

Process and Review

The Expert Review Panel has not reviewed this measure yet.

Source

National Eye Institute, Age-Related Eye Disease Study (AREDS), Phase II, Sunlight Exposure Questionnaire. 2/9/1996

Model used for deriving cumulative ocular exposure factor from:
McCarty C.A., Lee S.E., Livingston P.M., Bissinella M, & Taylor H.R. (1996). Ocular Exposure to UV-B in Sunlight: The Melbourne Visual Impairment Model. Bulletin of the World Health Organization, 74(4), 353-60.

Location factors used in model were obtained from:

Rosenthal F.S., West S.K., Munoz B., Emmet E.A., Strickland P.T., & Taylor H.R. (1991). Ocular and Facial Skin Exposure to Ultraviolet Radiation in Sunlight: A Personal Exposure Model with Application to a Worker Population. Health Physics, 61(1), 77-86.

General References

Clemons TE, Milton RC, Klein R, Seddon JM, Ferris FL 3rd; Age-Related Eye Disease Study Research Group. (2005). Risk factors for the incidence of Advanced Age-Related Macular Degeneration in the Age-Related Eye Disease Study (AREDS) AREDS report no. 19. Ophthalmology, 112(4):533-9.

Age-Related Eye Disease Study Research Group. (2001). Risk factors associated with age-related nuclear and cortical cataract: a case-control study in the Age-Related Eye Disease Study, AREDS Report No. 5. Ophthalmology, 108(8):1400-8.

Age-Related Eye Disease Study Research Group. (2000). Risk factors associated with age-related macular degeneration. A case-control study in the age-related eye disease study: Age-Related Eye Disease Study Report Number 3. Ophthalmology, 107(12):2224-32.

Protocol ID:

110801

Variables:

Export Variables
Variable NameVariable IDVariable DescriptionVersiondbGaP Mapping
PX110801_Workday_Sunlight_Exposure_Hours_3PX110801070300PART II When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Workday_Sunlight_Exposure_Hours_4PX110801070400PART II When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Workday_Sunlight_Exposure_Hours_5PX110801070500PART II When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Workday_Sunlight_Exposure_Hours_6PX110801070600PART II When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Workday_Over_Water_3_Plus_Hours_1PX110801080100PART II Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat?4N/A
PX110801_Workday_Over_Water_3_Plus_Hours_2PX110801080200PART II Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat?4N/A
PX110801_Workday_Over_Water_3_Plus_Hours_3PX110801080300PART II Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat?4N/A
PX110801_Workday_Over_Water_3_Plus_Hours_4PX110801080400PART II Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat?4N/A
PX110801_Workday_Over_Water_3_Plus_Hours_5PX110801080500PART II Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat?4N/A
PX110801_Workday_Over_Water_3_Plus_Hours_6PX110801080600PART II Did your main daytime activities during a typical work week have you on water for a total of three or more hours a day, for example working on a boat?4N/A
PX110801_Workday_Hat_With_Brim_1PX110801090100PART II During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Workday_Hat_With_Brim_2PX110801090200PART II During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Workday_Hat_With_Brim_3PX110801090300PART II During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Workday_Hat_With_Brim_4PX110801090400PART II During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Workday_Hat_With_Brim_5PX110801090500PART II During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Workday_Hat_With_Brim_6PX110801090600PART II During your work time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Workday_Sun_Glasses_1PX110801100100PART II During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Workday_Sun_Glasses_2PX110801100200PART II During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Workday_Sun_Glasses_3PX110801100300PART II During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Workday_Sun_Glasses_4PX110801100400PART II During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Workday_Sun_Glasses_5PX110801100500PART II During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Workday_Sun_Glasses_6PX110801100600PART II During your work time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Workday_Ordinary_Glasses_Contact_Lenses_1PX110801110100PART II How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Workday_Ordinary_Glasses_Contact_Lenses_2PX110801110200PART II How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Workday_Ordinary_Glasses_Contact_Lenses_3PX110801110300PART II How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Workday_Ordinary_Glasses_Contact_Lenses_4PX110801110400PART II How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Workday_Ordinary_Glasses_Contact_Lenses_5PX110801110500PART II How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Workday_Ordinary_Glasses_Contact_Lenses_6PX110801110600PART II How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Sunlight_Exposure_Hours_1PX110801120100PART III Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Sunlight_Exposure_Hours_2PX110801120200PART III Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Sunlight_Exposure_Hours_3PX110801120300PART III Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Sunlight_Exposure_Hours_4PX110801120400PART III Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Sunlight_Exposure_Hours_5PX110801120500PART III Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Sunlight_Exposure_Hours_6PX110801120600PART III Now, I want you to think about a typical 2-day work-free period when you were living in [CITY/TOWN] as a/an [ACTIVITY]. During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Over_Water_3_Plus_Hours_1PX110801130100PART III Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming?4N/A
PX110801_Leisure_Over_Water_3_Plus_Hours_2PX110801130200PART III Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming?4N/A
PX110801_Leisure_Over_Water_3_Plus_Hours_3PX110801130300PART III Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming?4N/A
PX110801_Leisure_Over_Water_3_Plus_Hours_4PX110801130400PART III Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming?4N/A
PX110801_Leisure_Over_Water_3_Plus_Hours_5PX110801130500PART III Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming?4N/A
PX110801_Leisure_Over_Water_3_Plus_Hours_6PX110801130600PART III Did your main daytime activities during your leisure time have you over water for a total of three or more hours a day, for example sailing, fishing or swimming?4N/A
PX110801_Leisure_Hat_With_Brim_1PX110801140100PART III During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Leisure_Hat_With_Brim_2PX110801140200PART III During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Leisure_Hat_With_Brim_3PX110801140300PART III During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Leisure_Hat_With_Brim_4PX110801140400PART III During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Leisure_Hat_With_Brim_5PX110801140500PART III During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Leisure_Hat_With_Brim_6PX110801140600PART III During your leisure time, when you were outside in direct sunlight, how often did you wear a hat with a brim?4N/A
PX110801_Leisure_Sun_Glasses_1PX110801150100PART III During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_City_Town_1PX110801010100PART I In what city or town were you living when you were 18?4N/A
PX110801_City_Town_2PX110801010200PART I [For subsequent cities/towns...] To what city or town did you move to next?4N/A
PX110801_City_Town_3PX110801010300PART I [For subsequent cities/towns...] To what city or town did you move to next?4N/A
PX110801_City_Town_Year_Start_1PX110801020100PART I What year did you turn 18?4N/A
PX110801_City_Town_Year_Start_2PX110801020200PART I [For subsequent cities/towns, record response to C from previous city/town]4N/A
PX110801_City_Town_Year_Start_3PX110801020300PART I [For subsequent cities/towns, record response to C from previous city/town]4N/A
PX110801_City_Town_Year_End_1PX110801030100PART I What year did you move from (CITY/TOWN)?4N/A
PX110801_City_Town_Year_End_2PX110801030200PART I What year did you move from (CITY/TOWN)?4N/A
PX110801_City_Town_Year_End_3PX110801030300PART I What year did you move from (CITY/TOWN)?4N/A
PX110801_Daytime_Job_Activity_1PX110801040100PART I What was your main daytime activity or job when you turned 18?4N/A
PX110801_Daytime_Job_Activity_2PX110801040200PART I [For subsequent daytime activities or jobs within a city/town...] What was your new daytime activity or job?4N/A
PX110801_Daytime_Job_Activity_3PX110801040300PART I [For subsequent cities/towns...] What was your main daytime activity or job when you first moved to (CITY/TOWN)?4N/A
PX110801_Daytime_Job_Activity_4PX110801040400PART I [For subsequent daytime activities or jobs within a city/town...] What was your new daytime activity or job?4N/A
PX110801_Daytime_Job_Activity_5PX110801040500PART I [For subsequent cities/towns...] What was your main daytime activity or job when you first moved to (CITY/TOWN)?4N/A
PX110801_Daytime_Job_Activity_6PX110801040600PART I [For subsequent daytime activities or jobs within a city/town...] What was your new daytime activity or job?4N/A
PX110801_Period_Year_Start_Activity_1PX110801050100PART I [Record year turned 18]4N/A
PX110801_Period_Year_Start_Activity_2PX110801050200PART I [For subsequent daytime activities or jobs within a city/town, record answer to F. from previous daytime activity or job and go to [If 'NO'] below]4N/A
PX110801_Period_Year_Start_Activity_3PX110801050300PART I [For subsequent cities/towns, record answer to B.]4N/A
PX110801_Period_Year_Start_Activity_4PX110801050400PART I [For subsequent daytime activities or jobs within a city/town, record answer to F. from previous daytime activity or job and go to [If 'NO'] below]4N/A
PX110801_Period_Year_Start_Activity_5PX110801050500PART I [For subsequent cities/towns, record answer to B.]4N/A
PX110801_Period_Year_Start_Activity_6PX110801050600PART I [For subsequent daytime activities or jobs within a city/town, record answer to F. from previous daytime activity or job and go to [If 'NO'] below]4N/A
PX110801_Period_Year_End_Activity_1PX110801060100PART I When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM? [If 'YES', record answer to C. and go to A. above] [If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]4N/A
PX110801_Period_Year_End_Activity_2PX110801060200PART I When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM? [If 'YES', record answer to C. and go to A. above] [If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]4N/A
PX110801_Period_Year_End_Activity_3PX110801060300PART I When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM? [If 'YES', record answer to C. and go to A. above] [If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]4N/A
PX110801_Period_Year_End_Activity_4PX110801060400PART I When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM? [If 'YES', record answer to C. and go to A. above] [If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]4N/A
PX110801_Period_Year_End_Activity_5PX110801060500PART I When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM? [If 'YES', record answer to C. and go to A. above] [If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]4N/A
PX110801_Period_Year_End_Activity_6PX110801060600PART I When you were living in (CITY/TOWN) did your exposure to direct sunlight in April through September stay pretty much the same for all your daytime activities between the hours of 10 AM and 4 PM? [If 'YES', record answer to C. and go to A. above] [If 'NO', or for subsequent periods of exposure within a town...] What year did your sunlight exposure change? [Record year and go to D. above]4N/A
PX110801_Workday_Sunlight_Exposure_Hours_1PX110801070100PART II When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Workday_Sunlight_Exposure_Hours_2PX110801070200PART II When you were living in [CITY/TOWN] as a/an [ACTIVITY], how many hours each day during a typical 5-day work week in April through September did you spend outside in direct sunlight between 10 AM and 4 PM?4N/A
PX110801_Leisure_Sun_Glasses_2PX110801150200PART III During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Sun_Glasses_3PX110801150300PART III During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Sun_Glasses_4PX110801150400PART III During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Sun_Glasses_5PX110801150500PART III During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Sun_Glasses_6PX110801150600PART III During your leisure time, about how often did you wear prescription or non-prescription sunglasses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Ordinary_Glasses_Contact_Lenses_1PX110801160100PART III How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Ordinary_Glasses_Contact_Lenses_2PX110801160200PART III How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Ordinary_Glasses_Contact_Lenses_3PX110801160300PART III How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Ordinary_Glasses_Contact_Lenses_4PX110801160400PART III How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Ordinary_Glasses_Contact_Lenses_5PX110801160500PART III How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A
PX110801_Leisure_Ordinary_Glasses_Contact_Lenses_6PX110801160600PART III How often did you wear ordinary glasses or contact lenses when you were outside in direct sunlight?4N/A