Table 2 Study population characteristics of SLE population used in the development and validation of SLE-PRO measures

Item generation^b

Female, n (%)

30 (100%)

N/A

16 (88.9%)

N/A

Age in years, mean (SD)

48.1 (13.1)

N/A

45.1 (12.3)

N/A

Race, n (%)

 White

22 (73.3%)

N/A

39%

N/A

 Black/African American

0

N/A

39%

N/A

 Hispanic

0

N/A

17%

N/A

 Asian

8 (26.7%)

N/A

5%

N/A

 Other

0

N/A

0

N/A

Education years (SD)

12.7 (4.5)

N/A

N/A

SLE duration in years, mean (SD)

9.2 (8.4)

N/A

9.1 (6.1)

N/A

Disease activity, mean (SD)

N/A

N/A

SLEDAI 6.6 (6.5)

N/A

Disease damage, mean (SD)

N/A

N/A

SDI 2.0 (2.0)

N/A

Cognitive interviewing^b

Female, n (%)

20 (100%)

N/A

N/A

N/A

Age in years, mean (SD)

52 (15.2)

N/A

N/A

N/A

Race, n (%)

 White

18 (90%)

N/A

N/A

N/A

 Black/African American

1 (5%)

N/A

N/A

N/A

 Hispanic

0

N/A

N/A

N/A

 Asian

1 (5%)

N/A

N/A

N/A

Other

0

N/A

N/A

N/A

Education years (SD)

12.9 (3.3)

N/A

N/A

N/A

SLE duration in years, mean (SD)

11.2 (6.1)

N/A

N/A

N/A

Disease activity, mean (SD)

N/A

N/A

N/A

N/A

Disease damage, mean (SD)

N/A

N/A

N/A

N/A

Other psychometric testing

Female, n (%)

152 (95%)

175 (94%)^a

301 (93%)

120 (91%)

Age in years, mean (SD)

45.3 (10.8)

42.5 (12.9)

43.3 (13.3)

40.4 (14.1)

Race, n (%)

 White

N/A

43 (23%)^a

75 (23%)^a

31 (23%)^a

 Black/African  American

N/A

112 (60%)^a

104 (32%)^a

68 (52%)^a

 Hispanic

N/A

23 (12%)^a

133 (41%)^a

17 (13%)^a

 Asian

N/A

11 (6%)^a

10 (3%)^a

7 (5%)^a

 Other

N/A

N/A

7 (2%)^a

11 (8%)^a

Education < high school, n (%)

N/A

N/A

94 (29%)^a

6 (4.4%)

SLE duration in years, mean (SD)

N/A

N/A

9.3 (7.6)

8.13 (6.84)

Disease activity, mean (SD)

N/A

SLEDAI 6.2 (5.8)

SLEDAI 3.9 (3.8)

SLEDAI 4.89 (4.43)

Disease damage, mean (SD)

N/A

SLICC 2.0 (2.1)

SDI 0.7 (1.1)

SDI 0.61 (1.05)