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Protocol - Impairment - Adult

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Protocol Name from Source:

This section will be completed when reviewed by an Expert Review Panel.

Availability:

Publicly available

Description:

The World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) is a 12-question, self-administered questionnaire and generic assessment instrument for health and disability that covers six domains: Cognition (items 3 and 6), Mobility (items 1 and 7), Self-care (items 8 and 9), Getting Along (items 10 and 11), Life Activities (items 2 and 12), and Participation (items 4 and 5). Items are rated from "None," "Mild," "Moderate," "Severe," to "Extreme or cannot do," indicating difficulty over the past month.

Protocol:

WHODAS 2.0

This questionnaire asks about difficulties due to health conditions. Health conditions include diseases or illnesses, other health problems that may be short or long lasting, injuries, mental or emotional problems, and problems with alcohol or drugs.

Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. For each question, please circle only one response.

In the past 30 days, how much difficulty did you have in:

S1

Standing for long periods such as 30 minutes?

None

Mild

Moderate

Severe

Extreme or cannot do

S2

Taking care of your household responsibilities?

None

Mild

Moderate

Severe

Extreme or cannot do

S3

Learning a new task, for example, learning how to get to a new place?

None

Mild

Moderate

Severe

Extreme or cannot do

S4

How much of a problem did you have joining in community activities (for example, festivities, religious, or other activities) in the same way as anyone else can?

None

Mild

Moderate

Severe

Extreme or cannot do

S5

How much have you been emotionally affected by your health problems?

None

Mild

Moderate

Severe

Extreme or cannot do

S6

Concentrating on doing something for ten minutes?

None

Mild

Moderate

Severe

Extreme or cannot do

S7

Walking a long distance such as a kilometre [or equivalent]?

None

Mild

Moderate

Severe

Extreme or cannot do

S8

Washing your whole body?

None

Mild

Moderate

Severe

Extreme or cannot do

S9

Getting dressed?

None

Mild

Moderate

Severe

Extreme or cannot do

S10

Dealing with people you do not know?

None

Mild

Moderate

Severe

Extreme or cannot do

S11

Maintaining a friendship?

None

Mild

Moderate

Severe

Extreme or cannot do

S12

Your day-to-day work?

None

Mild

Moderate

Severe

Extreme or cannot do

 

H1

Overall, in the past 30 days, how many days were these difficulties present?

Record number of days ____

H2

In the past 30 days, for how many days were you totally unable to carry out your usual activities or work because of any health condition?

Record number of days ____

H3

In the past 30 days, not counting the days that you were totally unable, for how many days did you cut back or reduce your usual activities or work because of any health condition?

Record number of days ____

This completes the questionnaire. Thank you.

Scoring:

There are two basic options for computing the summary scores for the WHODAS 2.0 short version.

Simple:

The scores assigned to each of the items-"none" (1), "mild" (2) "moderate" (3), "severe" (4) and "extreme" (5) -are summed. This method is referred to as simple scoring because the scores from each of the items are simply added up without recoding or collapsing of response categories; thus, there is no weighting of individual items. This approach is practical to use as a hand-scoring approach and may be the method of choice in busy clinical settings or in paper-pencil interview situations. As a result, the simple sum of the scores of the items across all domains constitutes a statistic that is sufficient to describe the degree of functional limitations.

Complex:

The more complex method of scoring is called "item-response-theory" (IRT)-based scoring. It takes into account multiple levels of difficulty for each WHODAS 2.0 item. It takes the coding for each item response as "none," "mild," "moderate," "severe," and "extreme" separately and then uses an algorithm to determine the summary score by differentially weighting the items and the levels of severity. The SPSS algorithm is available from WHO. The scoring has three steps:

• Step 1 - Summing of recoded item scores within each domain.

• Step 2 - Summing of all six domain scores.

• Step 3 - Converting the summary score into a metric ranging from 0 to 100 (where 0 = no disability; 100 = full disability).

Personnel and Training Required

None

Equipment Needs

None

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:

December 5, 2014

Definition

A self-administered questionnaire for assessing impairment and disability.

Purpose

This measure is used to assess impairment and difficulties in performing usual activities due to a variety of health conditions and diseases, including mental or emotional problems.

Selection Rationale

The World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) is a brief, self-administered questionnaire with good psychometric properties that can be used across all diseases (including mental, neurological, and addictive disorders), is applicable in both clinical and general population settings, and is applicable across different cultures. The WHODAS 2.0 produces standardized disability levels and profiles and has a direct conceptual link to the International Classification of Functioning, Disability and Health (ICF).

Language

Chinese, English, French, German, Spanish

Standards

StandardNameIDSource
Common Data Elements (CDE)Adult Mental Health Impairment Questionnaire Assessment Score4603774CDE Browser

Process and Review

This section will be completed when reviewed by an Expert Review Panel.

Source

Ustün, T. B., Chatterji, S., Kostanjsek, N., Rehm, J., Kennedy, C., Epping-Jordan, J., Saxena, S., von Korff, M., & Pull, C.; WHO/NIH Joint Project. (2010). Developing the World Health Organization Disability Assessment Schedule 2.0. Bulletin of the World Health Organization, 88(11), 815-823.

The WHODAS 2.0 is available for download from the World Health Organization website at www.who.int/classifications/icf/whodasii/en/.

General References

Andrews, G., Kemp, A., Sunderland, M., Von Korff, M., & Ustun, T.B. (2009). Normative data for the 12-item WHO Disability Assessment Schedule 2.0. PLoS One, 4(12), e8343.

Downing, N. R., Kim, J. I., Williams, J. K., Long, J. D., Mills, J. A., & Paulsen, J. S.; PREDICT‑HD Investigators and Coordinators of the Huntington Study Group. (2014) WHODAS 2.0 in prodromal Huntington disease: Measures of functioning in neuropsychiatric disease. European Journal of Human Genetics, 22(8), 958-963.

Konecky, B., Meyer, E. C., Marx, B. P., Kimbrel, N. A., & Morissette, S. B. (2014). Using the WHODAS 2.0 to assess functional disability associated with DSM-5 mental disorders. American Journal of Psychiatry, 171(8), 818-820.

Protocol ID:

610102

Variables:

Export Variables
Variable NameVariable IDVariable DescriptionVersiondbGaP Mapping
PX610102_Impairment_Standing_Long_PeriodsPX610102010000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Standing for long periods such as 30 minutes?4N/A
PX610102_Impairment_Household_ResponsibilitiesPX610102020000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Taking care of your household responsibilities?4N/A
PX610102_Impairment_Learning_New_TaskPX610102030000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Learning a new task, for example, learning how to get to a new place?4N/A
PX610102_Impairment_Joining_Community_ActivitiesPX610102040000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. How much of a problem did you have joining in community activities (for example, festivities, religious, or other activities) in the same way as anyone else can?4N/A
PX610102_Impairment_Emotionally_AffectedPX610102050000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. How much have you been emotionally affected by your health problems?4N/A
PX610102_Impairment_Concentrating_Ten_MinutesPX610102060000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Concentrating on doing something for ten minutes?4N/A
PX610102_Impairment_Walking_Long_DistancesPX610102070000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Walking a long distance such as a kilometre [or equivalent]?4N/A
PX610102_Impairment_Washing_SelfPX610102080000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Washing your whole body?4N/A
PX610102_Impairment_Getting_DressedPX610102090000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Getting dressed?4N/A
PX610102_Impairment_Dealing_New_PeoplePX610102100000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Dealing with people you do not know?4N/A
PX610102_Impairment_Maintaining_FriendshipPX610102110000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Maintaining a friendship?4N/A
PX610102_Impairment_WorkPX610102120000Think back over the past 30 days and answer these questions, thinking about how much difficulty you had doing the following activities. Your day-to-day work?4N/A
PX610102_Impairment_Difficult_Days_Past_MonthPX610102130000Overall, in the past 30 days, how many days were these difficulties present?4N/A
PX610102_Impairment_Unable_Days_Past_MonthPX610102140000In the past 30 days, for how many days were you totally unable to carry out your usual activities or work because of any health condition?4Variable Mapping
PX610102_Impairment_Reduced_Days_Past_MonthPX610102150000In the past 30 days, not counting the days that you were totally unable, for how many days did you cut back or reduce your usual activities or work because of any health condition?4N/A