Table 1.
Demographic and bone characteristics of adolescents with anorexia nervosa by sex
| Malea | Femalea | Effect size | p (unadjusted) | P (adjusted)b | |
|---|---|---|---|---|---|
| n | 25 | 253 | |||
| Age, years | 13.94 (13.04, 15.84) | 15.53 (14.11, 16.89) | −1.59c | 0.01 | |
| Height, cm | 163.05 ± 10.05 | 160.06 ± 8.79 | 2.99 ± 8.91 | 0.11 | |
| Height Z-score | −0.09 ± 0.93 | −0.11 ± 1.05 | 0.02 ± 1.04 | 0.92 | |
| BMI, kg/m2 | 15.88 ± 1.40 | 15.83 ± 1.58 | 0.05 ± 1.57 | 0.87 | |
| %mBMId | 80.78 ± 5.55 | 78.73 ± 7.06 | 2.05 ± 6.95 | 0.18 | |
| Duration illness (months) | 9 (7, 14) | 9 (5, 13) | 0c | 0.52 | |
| Whole body BMC Z-score | −0.60 ± 0.94 | −0.42 ± 0.93 | −0.18 ± 0.93 | 0.36 | 0.12 |
| Whole body BMC Z-score less than -1 | 9 (36.00%) | 81 (32.02%) | 0.66 | ||
| Whole body BMC Z-score less than -2 | 3 (12.00%) | 33 (13.04%) | 1.00 | ||
| Lumbar spine BMD Z-score | −0.19 ± 0.95 | −0.51 ± 1.00 | 0.32 ± 0.99 | 0.20 | 0.77 |
| Lumbar spine BMD Z-score less than -1 | 12 (48.00%) | 113 (44.66%) | 0.83 | ||
| Lumbar spine BMD Z-score less than -2 | 8 (32.00%) | 59 (23.32%) | 0.33 | ||
| Total hip BMD Z-score | −0.96 ± 0.93 | −0.81 ± 1.07 | −0.15 ± 1.06 | 0.51 | 0.28 |
| Total hip BMD Z-score less than -1 | 11 (44.00%) | 115 (45.45%) | 1.00 | ||
| Total hip BMD Z-score less than -2 | 5 (20.00%) | 45 (17.79%) | 0.79 | ||
| Femoral neck BMD Z-score | −0.70 ± 0.91 | −0.77 ± 1.02 | 0.06 ± 1.01 | 0.79 | 0.76 |
| Femoral neck BMD Z-score less than -1 | 10 (40.00%) | 162 (64.03%) | 0.03 | ||
| Femoral neck BMD Z-score less than -2 | 6 (24.00%) | 112 (44.27%) | 0.06 |
a
Results are presented as mean ± SD, median (interquartile range), or n (%).
b
multiple linear regression adjusted for age, %mBMI, and duration of illness
c
median difference (p-value shows if the difference is significant or not)
d
%mBMI = percentage median body mass index