Table 3.
Association between serum 25-hydroxyvitamin D status and physical performance
| Serum 25-hydroxyvitamin D | n | |||
|---|---|---|---|---|
| < 50 nmol/L | 50–75 nmol/L | > 75 nmol/L | ||
| β (95% CI) | β (95% CI) | Reference group | ||
| TUG, s | ||||
| Model 1 | 0.85 (0.24; 1.45)** | 0.83 (0.19; 1.47)* | 0 (ref) | 493 |
| Model 2 | 0.77 (0.18; 1.36)* | 0.84 (0.22; 1.47)** | 0 (ref) | 493 |
| Model 3 | 0.73 (0.14; 1.32)* | 0.83 (0.21; 1.45)** | 0 (ref) | 488 |
| Gait, m/s | ||||
| Model 1 | − 0.06 (− 0.10; − 0.02)** | − 0.05 (− 0.09; − 0.01)** | 0 (ref) | 749 |
| Model 2 | − 0.05 (− 0.09; − 0.01)** | − 0.04 (− 0.08; − 0.01)* | 0 (ref) | 749 |
| Model 3 | − 0.04 (− 0.08; − 0.01)* | − 0.04 (− 0.07; − 0.01)* | 0 (ref) | 745 |
| HGS, kg | ||||
| Model 1 | − 0.93 (− 2.25; 0.38) | − 0.71 (− 2.02; 0.61) | 0 (ref) | 752 |
| Model 2 | − 1.06 (− 2.38; 0.26) | − 0.84 (− 2.15; 0.47) | 0 (ref) | 752 |
| Model 3 | − 0.92 (− 2.25; 0.40) | − 0.78 (− 2.10; 0.53) | 0 (ref) | 748 |
| Knee-extension, N | ||||
| Model 1 | 7.74 (− 15.03; 30.50) | 12.23 (− 11.95; 36.42) | 0 (ref) | 494 |
| Model 2 | 7.70 (− 15.10; 30.50) | 13.09 (− 11.11; 37.29) | 0 (ref) | 494 |
| Model 3 | 9.89 (− 12.82; 32.60) | 12.71 (− 11.37; 36.80) | 0 (ref) | 489 |
Analyzed by multiple linear regression
Model 1 adjusted for age, sex and laboratory site, Model 2 adjusted for age, sex, laboratory site, BMI and season, Model 3 adjusted for age, sex, laboratory site, BMI, season, ethnicity, physical activity, alcohol, smoking and number of diseases, TUG Timed Up and Go, HGS Hand grip strength, N Newton
*P < 0.05
**P < 0.01