Table 1.
Sample characteristics by physical activity levels among men and women
| Characteristics | Weekly unbouted MVPA minutes | |||
|---|---|---|---|---|
| < 60 min | 60–149 min | ≥ 150 min | ||
| Men | n | n (row %) | ||
| Overall | 861 | 283 (32.9%) | 198 (23.0%) | 380 (44.1%) |
| Age, years | ||||
| 49–59 | 315 | 43 (13.7%) | 83 (26.3%) | 189 (60.0%) |
| 60–69 | 264 | 79 (29.9%) | 56 (21.2%) | 129 (48.9%) |
| ≥ 70 | 282 | 161 (57.1%) | 59 (20.9%) | 62 (22.0%) |
| BMI, kg/m2 | ||||
| Normal (18.5–24.9) | 168 | 41 (24.4%) | 38 (22.6%) | 89 (53.0%) |
| Overweight (25.0–29.9) | 389 | 112 (28.8%) | 92 (23.7%) | 185 (47.6%) |
| Obese (≥ 30) | 304 | 130 (42.8%) | 68 (22.4%) | 106 (34.9%) |
| Race | ||||
| White | 763 | 251 (32.9%) | 169 (22.1%) | 343 (45.0%) |
| Non-White | 98 | 32 (32.7%) | 29 (29.6%) | 37 (37.8%) |
| Education | ||||
| College graduate or above | 779 | 242 (31.1%) | 182 (23.4%) | 355 (45.6%) |
| Non-college graduate | 82 | 41 (50.0%) | 16 (19.5%) | 25 (30.5%) |
| Comorbidity score | ||||
| 0 | 589 | 153 (26.0%) | 140 (23.8%) | 296 (50.3%) |
| 1 | 138 | 66 (47.8%) | 29 (21.0%) | 43 (31.2%) |
| ≥ 2 | 134 | 64 (47.8%) | 29 (21.6%) | 41 (30.6%) |
| Depressive Symptoms | ||||
| CES-D score < 16 | 776 | 248 (32.0%) | 174 (22.4%) | 354 (45.6%) |
| CES-D score ≥ 16 | 85 | 35 (41.2%) | 24 (28.2%) | 26 (30.6%) |
| Current Working Status | ||||
| Working | 521 | 113 (21.7%) | 131 (25.1%) | 277 (53.2%) |
| Not working | 340 | 170 (50.0%) | 67 (19.7%) | 103 (30.3%) |
| Radiographic Disease | ||||
| RKOA (−) | 340 | 87 (25.6%) | 85 (25.0%) | 168 (49.4%) |
| RKOA (+) | 521 | 196 (37.6%) | 113 (21.7%) | 212 (40.7%) |
| Symptoms | ||||
| Frequent knee symptoms (−) | 515 | 163 (31.7%) | 115 (22.3%) | 237 (46.0%) |
| Frequent knee symptoms (+) | 346 | 120 (34.7%) | 83 (24.0%) | 143 (41.3%) |
| Women | n | n (row %) | ||
| Overall | 1061 | 527 (49.7%) | 298 (28.1%) | 236 (22.2%) |
| Age, years | ||||
| 49–59 | 304 | 82 (27.0%) | 114 (37.5%) | 108 (35.5%) |
| 60–69 | 381 | 171 (44.9%) | 124 (32.5%) | 86 (22.6%) |
| ≥ 70 | 376 | 274 (72.9%) | 60 (16.0%) | 42 (11.2%) |
| BMI | ||||
| Normal (18.5–24.9 kg/m2) | 320 | 124 (38.8%) | 93 (29.1%) | 103 (32.2%) |
| Overweight (25.0–29.9 kg/m2) | 367 | 189 (51.5%) | 99 (27.0%) | 79 (21.5%) |
| Obese (≥ 30 kg/m2) | 374 | 214 (57.2%) | 106 (28.3%) | 54 (14.4%) |
| Race | ||||
| White | 836 | 410 (49.0%) | 225 (26.9%) | 201 (24.0%) |
| Non-White | 225 | 117 (52.0%) | 73 (32.4%) | 35 (15.6%) |
| Education | ||||
| College graduate or above | 887 | 417 (47.0%) | 255 (28.7%) | 215 (24.2%) |
| Non-college graduate | 174 | 110 (63.2%) | 43 (24.7%) | 21 (12.1%) |
| Comorbidity score | ||||
| 0 | 762 | 344 (45.1%) | 230 (30.2%) | 188 (24.7%) |
| 1 | 192 | 110 (57.3%) | 43 (22.4%) | 39 (20.3%) |
| ≥ 2 | 107 | 73 (68.2%) | 25 (23.4%) | 9 (8.4%) |
| Depressive Symptoms | ||||
| CES-D score < 16 | 917 | 448 (48.9%) | 258 (28.1%) | 211 (23.0%) |
| CES-D score ≥ 16 | 144 | 79 (54.9%) | 40 (27.8%) | 25 (17.4%) |
| Current Working Status | ||||
| Working | 529 | 193 (36.5%) | 173 (32.7%) | 163 (30.8%) |
| Not working | 532 | 334 (62.8%) | 125 (23.5%) | 73 (13.7%) |
| Radiographic Disease | ||||
| Radiographic knee OA (−) | 422 | 191 (45.3%) | 120 (28.4%) | 111 (26.3%) |
| Radiographic knee OA (+) | 639 | 336 (52.6%) | 178 (27.9%) | 125 (19.6%) |
| Symptoms | ||||
| Frequent knee symptoms (−) | 644 | 296 (46.0%) | 179 (27.8%) | 169 (26.2%) |
| Frequent knee symptoms (+) | 417 | 231 (55.4%) | 119 (28.5%) | 67 (16.1%) |
MVPA = moderate-to-vigorous intensity physical activity; BMI = body mass index; CES-D = Center for Epidemiological Studies – Depression Scale