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Table 1 Characteristics of participants

From: PROMIS Fatigue short forms are reliable and valid in adults with rheumatoid arthritis

Mean (SD) or % All Clinic
n = 348
Sites Online
n = 200
P-value
NY
N = 82
MD
N = 217
AL
N = 49
Age (years) 57 (14) 56 (15) 56 (14) 60 (10) 51 (12) <.001
Female (%) 81% 85% 80% 78% 84% .422
Racea (%)
 American Indian or Alaskan 3% < 1% 3% 4%  
 Asian 4% 9% 5% 1%
 Black or African American 10% 11% 13% 20% 4%
 Middle Eastern/North African
 Native Hawaiian/Pacific Islander .2% 0.5%
 White 84% 71% 79% 80% 95%
 Other 1% 2% 2%
 Declined 1% 6% < 1%
Ethnicity
 Hispanic 7% 16% 4% 2% 6% .714
Education > High school (%) 79% 91% 76% 74% 93% <.001
Employment (%) .011
 Full time 36% 44% 35% 27% 32%
 Part time 8% 6% 9% 6% 8%
 Retired 23% 26% 25% 12% 15%
 Disabled due to RA 22% 14% 19% 49% 32%
 Otherb 11% 9% 12% 6% 15%
Urban 80% 90% 76% 80% 74% .098
RA Characteristics
 RA duration (years) 14 (11) 13 (12) 13 (10) 17 (12) 10 (10) <.001
 Patient Global Disease Activity (0–100) 30 (27) 27 (23) 32 (28) 28 (27) 57 (23) <.001
  1. aMultiple categories selected by some individuals. ^Between clinic and online samples
  2. bOther includes unemployed, homemaker, students, disabled – not due to RA