Table 1.
Characteristics of study participants
| Men (n = 62) | Women (n = 79) | P 1 | |
|---|---|---|---|
| Baseline measurements (1990 to 1994) | |||
| Body mass index, kg m−2 | 27.2 (3.5) | 25.1 (4.2) | <0.01 |
| Fat mass, kg | 24.2 (7.7) | 25.0 (8.9) | 0.59 |
| Body fat, % | 28.8 (6.1) | 37.3 (7.0) | <0.001 |
| Fat-free mass, kg | 58.3 (5.0) | 40.3 (3.6) | <0.001 |
| Follow-up measurements (2009 to 2010) | |||
| Age, years | 66.2 (6.8) | 67.2 (7.8) | 0.41 |
| Body mass index, kg m−2 | 28.3 (4.1) | 27.0 (5.3) | 0.09 |
| WOMAC median pain, out of 500 | 19 | 22 | - |
| Femoral head cartilage volume, mm3 | 3891 (636) | 2867 (451) | <0.001 |
| Femoral head bone area, mm2 | 1831 (179) | 1429 (126) | <0.001 |
| Femoral head cartilage defects, n (%) | |||
| Central superolateral | 22 (35.5) | 23 (29.1) | 0.422 |
| Central inferomedial | 30 (48.4) | 37 (46.8) | 0.862 |
| Anterior | 4 (6.3) | 1 (1.3) | 0.102 |
| Posterior | 11 (17.5) | 14 (17.7) | 0.972 |
Data presented as mean (standard deviation) or number (%) unless otherwise stated. 1 P-values represent difference between genders analysed by independent sample t-tests unless otherwise stated. 2Chi-squared test. WOMAC, Western Ontario and McMaster University osteoarthritis index.