From: Estrogen receptors genes polymorphisms and age at menarche in idiopathic scoliosis
Cobb angle
N
Mean ± SD [months]
Min – Max [months]
P
<30°
67
151.9 ± 14.7
121 - 188
0.0267a
≥50°
51
157.9 ± 14.0
121 - 191