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Table 1 Demographics

From: Women with knee osteoarthritis have more pain and poorer function than men, but similar physical activity prior to total knee replacement

   Women Men P value
Sample (n = 208) 66.3% (n = 138) 33.7% (n = 70)  
Age 61.92 (10.03) 61.66 (9.92) 0.86
Race White 93.48% 92.86% 0.23
  Black 4.35% 2.86%  
  Other 2.17% 1.43%  
Marital status Married 55.80% 60% 0.54
  Single 35.51% 31.43%  
Education High school 30.43% 28.57% 0.80
  College 60.14% 61.43%  
Income US$0 to US$19,999 28.26% 14.29% 0.05
  US$20,000 to US$39,999 17.39% 21.43%  
  US$40,000 to US$59,999 13.77% 11.43%  
  US$60,000+ 23.19% 37.14%  
Duration of knee pain (months) 0 to 35 months 23.19% 25.71% 0.86
  36 to 59 months 19.57% 21.43%  
  > 60 months 56.52% 52.86%  
OA grade 3 32.61% 18.57% 0.03*
  4 60.14% 74.29%  
Contralateral knee pain 78.26% 72.86% 0.39
Contralateral knee OA 14.49% 15.71% 0.84
BMI 35.43 (7.59) 33.19 (6.59) 0.04*
Pain at rest (0 to 20) 3.77 (4.36) 2.67 (3.81) 0.08
Non-opiate medication (acetaminophen equivalent) 980.84 (1,107.9) 681.79 (1,048.53) 0.06
Opiate medication (morphine equivalent) 6.76 (15.71) 3.86 (12.19) 0.14
  1. BMI = body mass index; OA = osteoarthritis.
  2. * = significance < 0.05