Table I.
Mean values (± SD) for auxologic and testicular measurements in boys with Klinefelter syndrome divided by age group
| Age 2.0–9.9 years | Age 10.0–14.9 years | P value | All | |
|---|---|---|---|---|
| N | 37 | 18 | 55 | |
| Height SDS | 0.8 ± 1.3 | 1.0 ± 1.2 | .54 | 0.9 ± 1.3 |
| Weight SDS | 0.7 ± 1.4 | 0.6 ± 1.3 | .57 | 0.7 ± 1.4 |
| Height SDS adjusted for midparental height SDS* | 0.7 ± 1.4 | 0.8 ± 1.3 | .68 | 0.7 ± 1.3 |
| BMI (kg/m2) | 18 ± 3 | 20 ± 5 | .07 | 18 ± 4 |
| BMI SDS | 0.5 ± 1.3 | 0.1 ± 1.4 | .25 | 0.4 ± 1.4 |
| Head Circumference SDS | 0.3 ± 1.7 | 1.0 ± 2.0 | .18 | 0.5 ± 1.8 |
| Upper segment/lower segment SDS | 1.3 ± 3.4 | 0.1 ± 3.0 | .22 | 0.8 ± 3.2 |
| Testicular volume (ml) | 1.2 ± 0.4 | 2.6 ± 1.3 | <.01 | 1.7 ± 1.1 |
| Testicular volume SDS | −1.2 ± 1.2 | −0.4 ± 1.6 | .04 | −0.9 ± 1.4 |
| Penile length (cm) | 4.0 ± 0.7 | 5.1 ± 2.2 | .01 | 4.4 ± 1.7 |
| Penile length SDS | −1.7 ± 0.6 | −1.4 ± 0.9 | .19 | −1.6 ± 0.8 |
P value younger versus older group.
*
If the height SDS adjusted for midparental height SDS = 0, then the child’s height = the midparental height for age.