SC group (n=235) | IC group (n=381) | Total (N=616) | ||||
---|---|---|---|---|---|---|
n | % | n | % | N | % | |
Sex | 235 | 100 | 381 | 100 | 616 | 100 |
Male | 99 | 42.1 | 139 | 36.5 | 238 | 38.6 |
Female | 136 | 57.9 | 242 | 63.5 | 378 | 61.4 |
Age, years | 232 | 98.7 | 380 | 99.7 | 612 | 99.4 |
<60 | 73 | 31.5 | 121 | 31.8 | 194 | 31.7 |
60–70 | 68 | 29.3 | 99 | 26.1 | 167 | 27.3 |
70–80 | 72 | 31.0 | 114 | 30.0 | 186 | 30.4 |
>80 | 19 | 8.2 | 46 | 12.1 | 65 | 10.6 |
BMI (kg/m2) | 229 | 97.4 | 364 | 95.5 | 593 | 96.3 |
Underweight (<20) | 1 | 0.4 | 6 | 1.6 | 7 | 1.2 |
Normal (≥20 to <25) | 58 | 25.3 | 102 | 28.0 | 160 | 27.0 |
Overweight (≥25 to <30) | 111 | 48.5 | 172 | 47.3 | 283 | 47.7 |
Obese (≥30 to <40) | 53 | 23.1 | 76 | 20.9 | 129 | 21.8 |
Severely obese (≥40) | 6 | 2.6 | 8 | 2.2 | 14 | 2.4 |
Knee OA location | 232 | 98.7 | 375 | 98.4 | 607 | 98.5 |
Right | 128 | 55.2 | 185 | 49.3 | 313 | 51.6 |
Left | 79 | 34.1 | 162 | 43.2 | 241 | 39.7 |
Bilateral | 25 | 10.8 | 28 | 7.5 | 53 | 8.7 |
Knee OA duration, years | 232 | 98.7 | 375 | 98.4 | 607 | 98.5 |
<1 | 29 | 12.4 | 118 | 31.1 | 147 | 24.0 |
1-5 | 98 | 42.1 | 145 | 38.3 | 243 | 39.7 |
5-10 | 72 | 30.9 | 75 | 19.8 | 147 | 24.0 |
>10 | 34 | 14.6 | 41 | 10.8 | 75 | 12.3 |
Knee OA severity (Kellgren-Lawrence grade) | 235 | 100 | 381 | 100 | 616 | 100 |
I | 23 | 9.8 | 31 | 8.1 | 54 | 8.8 |
II | 108 | 46.0 | 147 | 38.6 | 255 | 41.4 |
III | 104 | 44.3 | 203 | 53.3 | 307 | 49.8 |