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Table 2 Productivity, physical functioning, and health-related quality of life at baseline as assessed by WPS-RA, HAQ-DI, and SF-36

From: Discriminant validity, responsiveness and reliability of the rheumatoid arthritis-specific Work Productivity Survey (WPS-RA)

 

All randomly assigneda

(n = 220)

 

Number

Mean (SD)

Median

WPS-RAb

   

   Number of days of work missed (absenteeism)

85

2.2 (5.85)

0

   Number of days with productivity = 50% at work (presenteeism)

85

5.9 (8.56)

2

   Rate of arthritis interference with work productvityc

85

4.5 (2.50)

5

   Number of days of household work missed

220

9.2 (9.84)

5

   Number of days with productivity = 50% in household work

219

11.2 (10.00)

10

   Number of days of family, social, or leisure activities missed

220

4.0 (6.74)

2

   Number of days with outside help

217

1.2 (4.29)

0

   Rate of arthritis interference with household work productvityc

216

5.8 (2.75)

5.5

HAQ-DI

219

1.5 (0.64)

1.5

SF-36 PCS

216

27.88 (7.84)

27.51

SF-36 MCS

216

44.71 (11.46)

45.28

  1. aModified intent-to-treat population; bWork Productivity Survey – Rheumatoid Arthritis (WPS-RA) recall period is 1 month; cscore on a scale of 0 to 10 points (0 = no interference and 10 = complete interference). HAQ-DI, Health Assessment Questionnaire – Disability Index; SD, standard deviation; SF-36, Short Form-36 health survey; SF-36 MCS, Short Form-36 health survey – Mental Component Summary; SF-36 PCS, Short Form-36 health survey – Physical Component Summary.