Table 1.
Characteristics of the osteoarthritis and control study population
| Characteristic | Cases | Controls |
|---|---|---|
| Sample size | 890 | 844 |
| Males (%) | 226 (25.28) | 681 (80.69) |
| BMI (mean ± SD) | 25.76 ± 3.69 | 24.91 ± 3.04* |
| Underweight (%) | 8 (0.89) | 12 (1.42) |
| Normal weight (%) | 400 (44.94) | 422 (50) |
| Overweight (%) | 376 (42.24) | 368 (43.60) |
| Obese (%) | 106 (11.91) | 42 (4.98) |
| Age (mean ± SD) | 62.51 ± 11.43 | 54.07 ± 11.60* |
BMI body mass index (kg/m2), OA osteoarthritis, K–L score Kellgren/Lawrence score
underweight, BMI < 18.5; normal, 18.5 ≤ BMI < 25; overweight, 25 ≤ BMI < 30; obese, BMI ≥ 30
*P < 0.001 for Mann-Whitney test as applicable between cases/controls