Table 1

 Characteristics of study subjects (n = 297) at baseline (1990–4) and follow-up (2003–4)

At baselineAt follow-upp Value*
Except where indicated, values are mean (SD).
*Difference in variables between baseline and current follow-up, using paired-samples t test.
†Data available on 294 subjects.
‡Data available on 233 subjects.
Age (years)58.0 (5.5)
Female186 (63%)
Height (cm)168.1 (9.0)
Weight (kg)71.3 (13.3)73.4 (14.3)†<0.001
Body mass index (kg/m2)25.2 (3.8)25.9 (4.3)†<0.001
Waist circumference (cm)80.2 (12.6)
Hip circumference (cm)98.9 (7.8)
Waist-to-hip ratio0.81 (0.09)
Fat-free mass (kg)47.0 (9.7)46.4 (10.2)‡0.78
Fat mass (kg)24.3 (8.4)26.6 (8.9)‡<0.001
Tibial cartilage volume (mm3)3731 (1116)
Tibial plateau bone area (mm2)3301 (474)
Presence of cartilage defects184 (62%)