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Table 1 Characteristics of the rheumatoid arthritis group (RAG) and the control group (CG)

From: Hand strength in patients with RA correlates strongly with function but not with activity of disease

Variables RAG
n = 121
CG
n = 121
Age (years) 57.50 ± 10.75 57.48 ± 10.48
BMI (kg/m 2) 28.26 ± 5.84 29.74 ± 6.08
Sex (%)
 Male 14 (11.6) 14 (11.2)
 Female 107 (88.4) 107 (88.4)
Ethnicity (%)
 White 81 (66.9) 67 (55.4)
 Black 3 (2.5) 12 (9.9)
 Brown skin 36 (29.8) 42 (34.7)
 Indian 1 (0.8)
Educational level (%)
 None 8 (6.6) 5 (4.1)
 Incomplete elementary school 49 (40.5) 52 (43.0)
 Complete elementary school 17 (14.0) 15 (12.4)
 Incomplete secondary school 22 (18.2) 5 (4.1)
 Complete secondary school 18 (14.9) 37 (30.6)
 Higher education 7 (5.8) 7 (5.8)
Marital status (%)
 Single 19 (15.7) 10 (8.3)
 Married 65 (53.7) 72 (59.5)
 Divorced 19 (15.7) 14 (11.6)
 Widowed 14 (11.6) 18 (14.9)
 Stable union 4 (3.3) 7 (5.8)
Dominant hand (%)
 Right 114 (94.2) 115 (95.0)
Associated diseases (%)
 Systemic arterial hypertension 71 (58.7) 74 (61.2)
 Osteoporosis 31 (25.6) 3 (2.5)
 Diabetes 18 (14.9) 32 (26.4)
  1. SD: standard deviation; kg/m 2: kilograms per square meter