|
Characteristics of participants (n = 326) |
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| 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 |
|||
| 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 |
|
Where errors are shown, results are means ± SD. BMI, body mass index; PWC170, physical work capacity at 170 beats/minute. aMcNemar tests; others are paired t tests. | |||
Ding et al. Arthritis Research & Therapy 2006 8:R8 doi:10.1186/ar1835 |
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