Idiopathic scoliosis is quite common, affecting 2-3 in every 100 people. In 8 out of 10 cases, the condition usually develops at ages 10-15, during the growth spurt of puberty. This is called late onset or adolescent idiopathic scoliosis and the curve is almost always to the right. During adolescence, girls are much more likely to be affected. This is probably because girls typically have shorter and faster growth spurts than boys. Less commonly, scoliosis develops in younger children. This is called early onset idiopathic scoliosis. The curvature is usually to the left and slightly more boys are affected than girls.
Attribution: BUPA