Table 1.
Total (n = 798) Mean ± SD * |
Girls (n = 658) |
Boys (n = 140) |
p-Value * | |
---|---|---|---|---|
Age, y | 14.0 ± 1.6 | 13.8 ± 1.6 | 15.1 ± 1.3 | <0.001 |
Height, cm | 161.9 ± 8.5 | 160.0 ± 7.0 | 171.0 ± 9.1 | <0.001 |
Height Z-score | 0.41 ± 1.0 | 0.41 ± 1.0 | 0.41 ± 1.1 | 0.99 |
BMI, kg/m2 | 18.2 ± 1.9 | 18.1 ± 2.7 | 18.9 ± 3.5 | 0.01 |
BMI Z-score | −0.65 ± 1.2 | −0.64 ± 1.1 | −0.69 ± 1.5 | 0.66 |
Cobb angle, degrees | 53.8 ± 11.3 | 53.7 ± 11.3 | 54.0 ± 11.4 | 0.66 |
Curve pattern | 0.017 | |||
Lenke 1, n | 435 | 368 | 67 | |
Lenke 2, n | 75 | 51 | 24 | |
Lenke 3, n | 37 | 29 | 8 | |
Lenke 4, n | 6 | 4 | 2 | |
Lenke 5, n | 208 | 174 | 34 | |
Lenke 6, n | 37 | 32 | 5 | |
Femoral neck BMD, g/cm2 | 0.82 ± 0.12 | 0.81 ± 0.12 | 0.85 ± 0.12 | 0.001 |
Femoral neck BMD Z-score | −0.68 ± 0.96 | −0.57 ± 0.92 | −1.2 ± 0.96 | <0.001 |
BMD Z-score ≤ −2, % | 8.1 | 5.2 | 22.1 | <0.001 |
BMD Z-score ≤ −1, % | 37.5 | 32.8 | 59.3 | <0.001 |
p-value * indicates p-value of the comparison between AIS girls and boys. Mean ± SD * indicates that continuous variables were presented as mean ± standard deviation (SD). BMI, body mass index; BMD, bone mineral density. Age, height, BMI, BMD were compared by Student’s t-test; Cobb angle was compared by Mann–Whitney U test. Curve pattern and the prevalence of low BMD were compared by chi-squared test.