Table 2.
Clinical characteristics of adolescent girls with anorexia nervosa and healthy controls
| Anorexia Nervosa (n=262) | Controls (n=90) | P value | |
|---|---|---|---|
| Age (years) | 17.5 ± 0.1 | 16.2 ± 0.2 | <0.0001* |
| Height (cm) | 164.8 ± 0.4 | 162.3 ± 0.7 | 0.0051 |
| Weight (kg) | 46.8 ± 0.4 | 55.5 ± 0.6 | <0.0001 |
| Height Z-score | 0.3 ± 0.06 | 0.1 ± 0.1 | NS |
| Bone Age (years) | 16.3 ± 0.1 | 16.2 ± 0.2 | NS |
| BMI (kg/m2) | 17.2 ± 0.09 | 21.01 ± 0.2 | <0.0001* |
| BMI percentile | 8.5 ± 0.8 | 54.1 ± 1.3 | <0.0001* |
| BMI Z-score | −1.7 ± 0.05 | 0.1 ± 0.08 | <0.0001 |
| % Median BMI | 82.2 ± 0.4 | 103.2 ± 0.7 | <0.0001* |
| %Expected body weight for height | 79.1 ± 0.6 | 99.9 ± 1.0 | <0.0001* |
| Age at menarche (years) | 12.8 ± 0.1 | 12.2 ± 0.2 | 0.0026* |
| Age at diagnosis of anorexia nervosa (years) | 15.9 ± 2.2 | - | - |
| Duration since diagnosis (months) | 17.8 ± 20.4 | - | - |
| Duration of amenorrhea (for those with amenorrhea (months) | 9.1 ± 0.5 | - | - |
| Whole body less head BMD Z-score | −1.03 ± 0.06 | −0.4 ± 0.1 | <0.0001 |
| Spine BMD Z-score | −1.0 ± 0.06 | −0.04 ± 0.1 | <0.0001 |
| Hip BMD Z-score | −0.8 ± 0.06 | 0.1 ± 0.1 | <0.0001 |
Mean ±SEM *Wilcoxon test is used for nonparametric samples