Table 1.

Sample characteristics of subjects (n = 5,384) with data from the first available survey^*

Characteristic	Value
Age, mean ± SD years (range)	51.3 ± 9.1 (19–64)
Women	4,397 (81.9)
White	4,692 (88.8)
> high school education	3,329 (63.4)
HAQ score, mean ± SD†	1.0 ± 0.7
Employed at disease onset	4,385 (84.6)
Currently employed‡	3,087 (58.5)
Full time (≥35 hours/week)	2,118 (74.1)
Professional/managerial work	1,882 (41.4)
Self employed	463 (16.3)
Main form of work of subjects not currently employed‡	2,192 (41.5)
Unemployed	144 (6.6)
Retired	436 (20.4)
Housework	599 (28.0)
Student	31 (1.5)
Disabled	930 (43.5)

^*Values are the number (percentage) unless otherwise indicated.

^†Health Assessment Questionnaire (HAQ) measure of functional limitation (range 0–3, where 0 = no limitation) (n = 5,309).

^‡Of subjects with employment status data in the first available survey.