Table 3 Health-related quality of life, work productivity, and resource use by the presence of tophi (unadjusted)

HRQOL

  SF-12 MCS

50.07

9.42

46.06

12.12

44.44

12.88

<0.001

  SF-12 PCS

42.62

12.30

38.26

11.33

36.90

11.71

<0.001

  SF-6D Utility

0.73

0.14

0.66

0.14

0.64

0.16

<0.001

Work Productivity

  % Work missed

4.76

17.68

5.28

18.09

8.80

13.65

0.513

  % Impairment at work

16.62

23.42

21.36

24.92

37.67

32.13

<0.001

  % Overall work impairment

19.43

27.59

24.62

28.36

40.17

34.51

0.002

  % Activity impairment

33.35

32.30

44.05

32.08

48.68

34.77

<0.001

Resource Use

  Number of traditional healthcare provider visits

5.71

6.91

7.02

7.52

7.34

9.26

0.065