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Table 2 The demographic characteristics of the recruited sample at baseline

From: The effects of a home-based exercise intervention on elderly patients with knee osteoarthritis: a quasi-experimental study

Characteristic Total (n = 141) Intervention (n = 71) Control (n = 70) P-value
N (%) n (%) n (%)
Age - Mean (SD), yb 68.9 (7.35) 68.9 (7.78) 68.8 (6.96) 0.963
Gendera
 Male 22 (15.6) 12 (16.9) 10 (14.3) 0.669
 Female 119 (84.4) 59 (83.1) 60 (85.7)  
Body mass index - Mean (SD), kg/m2b 25.2 (3.48) 25.0 (3.45) 25.4 (3.51) 0.565
Symptom duration - Mean (SD), y 6.4 (8.52) 6.7 (9.39) 6.0 (7.60) 0.664
Level of educationa        0.524
 Primary school or less 22 (15.6) 12 (16.9) 10 (14.3)  
 Junior high school 48 (34.0) 25 (35.2) 23 (32.9)  
 High school 31 (22.0) 12 (16.9) 19 (27.1)  
 College graduate and above 40 (28.4) 22 (31.0) 18 (25.7)  
Marital statusa        0.669
 Single 22 (15.6) 12 (16.9) 10 (14.3)  
 Married 119 (84.4) 59 (83.1) 60 (85.7)  
Number of affected knees a        0.207
 One 63 (44.7) 28 (39.4) 35 (50.0)  
 Two 78 (55.3) 43 (60.6) 35 (50.0)  
Uses a walkera        0.637
 Yes 5 (3.5) 2 (2.8) 3 (4.3)  
 No 136 (96.5) 69 (97.2) 67 (95.7)  
Comorbid conditionsa
 Hypertension        0.553
  Yes 68 (48.2) 36 (50.7) 32 (45.7)  
  No 73 (51.8) 35 (49.3) 38 (54.3)  
 Diabetes        0.560
  Yes 29 (20.6) 16 (22.5) 13 (18.6)  
  No 112 (79.4) 55 (77.5) 57 (81.4)  
 Coronary heart disease        0.743
  Yes 38 (27.0) 20 (28.2) 18 (25.7)  
  No 103 (73.0) 51 (71.8) 52 (74.3)  
 Osteoporosis        0.105
  Yes 21 (14.9) 14 (19.7) 7 (10.0)  
  No 120 (85.1) 57 (80.3) 63 (90.0)  
Current drug use
 Analgesics        0.654
  Yes 32 (22.7) 15 (21.1) 17 (24.3)  
  No 109 (77.3) 56 (78.9) 53 (75.7)  
 Cartilage protection drugs        0.067
  Yes 29 (20.6) 19 (26.8) 10 (14.3)  
  No 112 (79.4) 52 (73.2) 60 (85.7)  
  1. aChi-square or Fisher’s Exact tests were used
  2. bIndependent samples t-test was used