Table 2 Baseline characteristics of KOA
Characteristics | Male | Female | Total |
|---|---|---|---|
Cases, n (%) | 126 (31.2) | 278 (68.8) | 404 (100) |
Age, year, mean (SD) | 62.04 (7.46) | 63.01 (6.97) | 62.71 (7.13) |
Age group, n (%) | |||
 < 55 years | 24 (19.0) | 36 (12.9) | 60 (14.9) |
 55–64 years | 54 (42.9) | 122 (43.9) | 176 (43.6) |
 65–74 years | 40 (31.7) | 102 (36.7) | 142 (35.1) |
 ≥ 75 years | 8 (6.3) | 18 (6.5) | 26 (6.4) |
Education, means (SD), years | 7.58 (2.66) | 5.61 (3.78) | 6.24 (3.57) |
Education, n (%) | |||
 Illiterate | 3 (2.4) | 63 (22.7) | 66 (16.3) |
 Primary level | 38 (30.2) | 96 (34.5) | 134 (33.2) |
 Elementary level | 63 (5.0) | 86 (30.9) | 149 (36.9) |
 High school | 22 (17.5) | 33 (11.9) | 55 (13.6) |
 ≥ College | 0 (0) | 0 (0) | 0 (0) |
Smoking, n (%) | |||
 Never smoking | 65 (51.6) | 272 (97.8) | 337 (83.4) |
 Ex-smoker | 9 (7.1) | 2 (0.7) | 11 (2.7) |
 Current smoker | 52 (41.3) | 4 (1.4) | 56 (13.9) |
Drinking, n (%) | |||
 Never drinking | 62 (49.2) | 272 (98.2) | 334 (82.9) |
 Ex-drinker | 7 (5.6) | 0 (0) | 7 (1.7) |
 Current drinker | 57 (45.2) | 5 (1.8) | 62 (15.4) |
BMI, means (SD), kg/m2 | 25.25 (4.49) | 26.13 (3.98) | 25.86 (4.16) |
BMI group, n (%) | |||
 Normal | 46 (37.1) | 74 (26.9) | 120 (30.1) |
 Over weight | 53 (42.7) | 128 (46.5) | 181 (45.4) |
 Obesity | 25 (20.2) | 73 (26.5) | 98 (24.6) |
Sleeping time, means (SD), hours | 7.58 (0.81) | 7.14 (1.27) | 7.28 (1.16) |
Sleep situation, n (%) | |||
 Satisfy | 96 (76.8) | 165 (59.9) | 261 (65.1) |
 Not bad | 17 (13.6) | 68 (24.6) | 85 (21.2) |
 Insufficient | 12 (9.6) | 43 (15.6) | 55 (13.7) |
Often walk | |||
 Yes | 53 (42.1) | 112 (40.3) | 165 (40.8) |
 No | 166 (59.7) | 73 (57.9) | 239 (59.2) |