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Table 2 Sample Demographics

From: Detecting functional change in response to exercise in knee osteoarthritis: a comparison of two computerized adaptive tests

  Mean (SD) or Frequency (%)
Variable Baseline Sample(N = 120) Post-Exercise training Sample (N = [104), p value*
Age (years) 65.06 (SD = 7.39) 65.57(SD = 7.38), P = 0.05
Gender   
 Female 95 (79.2%) 85(81.7%)
 Male 25 (20.8%) 19(18.3%), P = 0.1
Race   
 White, Non-Hispanic 70 (58.3%) 62(59.6%)
 Black, Non-Hispanic 33 (27.5%) 28(26.9%)
 Hispanic 4 (3.3%) 2(1.9%)
 Others 13 (10.8%) 12(11.6%), p = 0.1494
Body Mass Index (BMI)   
 Underweight (< 18.50) 1 (0.83%) 1(0.96%)
 Normal range (18.50–24.99) 24 (20%) 22(21.15%)
 Overweight (25.00–29.99) 36 (30.0%) 28(26.92%)
 Obese (> = 30.00) 59 (49.17%) 53(50.96%), P = 0.1587**
Knee replacement   
 Yes 12 (10.1%) 9(8.7%)
 No 107 (89.2%) 94(90.4%)
 Missing 1(0.8%) 1(1%), P = 0.2042
  1. *: p value of testing the demographic variables for subjects with and without Post-Exercise training data
  2. **: categories (underweight and normal range) were merged; categories (overweight and obese) were merged
  3. Note: BMI is calculated by body weight divided by the square of the height