Table 1.

Washington Group modules and thresholds.

Module	Items	Response Options	Threshold-Standard	Threshold-Wide
Short Set (SS)	Do you have difficulty in seeing, even if wearing glasses? Do you have difficulty in hearing, even if using a hearing aid? Do you have difficulty walking or climbing steps? Do you have difficulty remembering or concentrating? Do you have difficulty with self-care, such as washing all over or dressing? Using your usual language, do you have difficulty communicating, for example understanding or being understood?	No difficulty Some difficulty A lot of difficulty Cannot do at all	Any domain a lot of difficulty or unable to do	Any domain some difficulty
Labor Force Survey Disability Module (LFS-DM)	Short Set as above, plus anxiety and depression questions detailed below: 7.How often do you feel worried, nervous or anxious? 8.Thinking about the last time you felt worried, nervous or anxious, how would you describe the level of these feelings? 9.How often do you feel depressed? 10.Thinking about the last time you felt depressed, how depressed did you feel?	Questions 7 and 9: Daily Weekly Monthly A few times a year Never Questions 8 and 10: A little A lot Somewhere between a little and a lot	Either domain daily and a lot	Either domain daily or weekly and a lot, or in between a little and a lot
Short Set Enhanced (SS-E)	Labor Force Survey Disability Module as above, plus upper body function questions detailed below: 11.Do you have difficulty raising a 2-litre bottle of water or soda from waist to eye level? 12.Do you have difficulty using your hands and fingers, such as picking up small objects, for example, a button or pencil, or opening or closing containers or bottles?	No difficulty Some difficulty A lot of difficulty Cannot do at all	Either domain a lot of difficulty or unable to do	Any domain some difficulty
Extended Set on Functioning (ESF)	Short Set Enhanced as above, plus pain and fatigue questions detailed below: 13.In the past 3 months, how often did you have pain? 14.Thinking about the last time you had pain, how much pain did you have? 15.In the past 3 months, how often did you feel very tired or exhausted? 16.Thinking about the last time you felt very tired or exhausted, how long did it last? 17.Thinking about the last time you felt this way, how would you describe the level of tiredness? In addition: use of assistive products was asked as separate questions, and respondents were asked whether they have difficulties with, domain with, and separately without, their products	Questions 13 and 15: Never Some days Most days Every day Questions 14 and 17: A little A lot Somewhere between a little and a lot Question 16: Some of the day Most of the day All of the day	Pain: Every day and a lot Fatigue: Most days and all of the day or Every day and most of the day or Every day and all of the day	No change