Table 1.
Characteristics of study participants
| Females (n 183) | Males (n 132) | Difference between the sexes | |||
|---|---|---|---|---|---|
| Mean | sd | Mean | sd | P value | |
| Age | 15·9 | 0·3 | 15·8 | 0·3 | 0·09 |
| Height (cm) | 166·8 | 5·7 | 178·2 | 5·7 | <0·001 |
| Weight (kg) | 61·7 | 10·1 | 69·0 | 11·3 | <0·001 |
| BMI (kg/m2) | 22·2 | 3·2 | 21·7 | 3·3 | 0·240 |
| Normal weight (%) | 79·1 | 81·3 | <0·05 | ||
| Overweight (%) | 17·6 | 14·0 | |||
| Obesity (%) | 3·3 | 4·7 | |||
| Fat mass (kg) | 19·0 | 6·7 | 13·4 | 7·8 | <0·001 |
| Fat (%) | 31·3 | 6·2 | 19·3 | 7·7 | <0·001 |
| Lean body mass (kg) | 40·4 | 4·8 | 53·0 | 6·3 | <0·001 |
| Bone mass (kg) | 2·3 | 0·3 | 2·8 | 0·4 | <0·001 |
| Bone mineral density (g/cm2) | 1·101 | 0·089 | 1·138 | 0·107 | 0·001 |
| PTH (ng/l) | 39·4 | 13·3 | 42·2 | 14·1 | 0·08 |
| 25(OH)D (nmol/l) | 43·1 | 23·0 | 42·0 | 22·7 | 0·67 |
| 25(OH)D < 50 nmol/l n (%) | 70 | 66·7 | 0·54 | ||