Table 1 Characteristics of participants (n = 326)
From: Genetic mechanisms of knee osteoarthritis: a population-based longitudinal study
Characteristic | Offspring (n = 163) | Controls (n = 163) | P |
|---|---|---|---|
Values at baseline (2000–2001) |  |  |  |
   Age (years) | 45.1 ± 6.5 | 45.2 ± 6.5 | 0.87 |
   Height (cm) | 169 ± 8 | 169 ± 9 | 0.84 |
   Weight (kg) | 80 ± 16 | 75 ± 14 | 0.04 |
   BMI (kg/m2) | 27.9 ± 5.1 | 26.2 ± 4.3 | 0.02 |
   Prevalence of knee pain (%) | 47 | 22 | <0.01a |
   Lower-limb muscle strength (kg) | 127 ± 49 | 135 ± 50 | 0.006 |
   PWC170 (W/kg) | 2.94 ± 1.13 | 2.91 ± 0.99 | 0.77 |
Change during two-year follow-up | Â | Â | Â |
   Change in weight (kg) | 1.2 ± 4.4 | 1.3 ± 5.0 | 0.89 |
   Change in BMI (kg/m2) | 0.6 ± 1.5 | 0.7 ± 1.8 | 0.58 |
   Incidence of knee pain (%) | 47 | 41 | 0.35a |
   Change in lower-limb muscle strength (kg) | -8.5 ± 24.6 | -10.7 ± 28.0 | 0.47 |
   Change in PWC170 (W/kg) | -0.7 ± 1.0 | -0.4 ± 0.9 | <0.01 |