Table 2.
Correlation coefficients (p-values) for associations of 25(OH)D with age, body composition, physical activity and muscle parameters.
| Characteristic | Serum 25(OH)D (nmol/L) | |
|---|---|---|
| Women | Men | |
| Age (year) * | 0.005 (0.976) | 0.373 (0.021) |
| BMI (kg/m2) * | −0.202 (0.178) | −0.213 (0.199) |
| Total body fat percentage (%) * | −0.063 (0.679) | −0.183 (0.272) |
| Appendicular lean mass (kg) * | −0.093 (0.538) | −0.076 (0.652) |
| Physical activity (min/week) * | 0.302 (0.042) | 0.098 (0.557) |
| Time spent outdoors (hours/week) * | 0.053 (0.725) | 0.083 (0.621) |
| Hand grip strength (kg) * | −0.008 (0.956) | 0.061 (0.717) |
| Quadricep strength (kg) * | 0.334 (0.023) | 0.174 (0.295) |
| Gait speed (m/s) | 0.165 (0.272) | −0.225 (0.175) |
| Chair standing time (s) * | 0.011 (0.941) | −0.171 (0.311) |
| Stair climb power (W) | 0.124 (0.412) | −0.254 (0.124) |
| SPPB score * | 0.069 (0.647) | 0.087 (0.605) |
All correlations are Pearson correlation coefficients unless otherwise specified. Abbreviations: 25(OH)D: 25-hydroxycholcalciferol; BMI: body mass index; and SPPB: short physical performance battery. * Spearman correlations. Bold p-values are significant.