The severity of scoliosis is defined by Cobb angle from X-ray image. It can be divided into three levels:
Mild level: The Cobb angle is within the range of 10-20 degrees, requires exercise or physical therapy, and regular monitoring, usually per half-year.
Moderate level: The Cobb angle is from 20 to 40 degrees, and it is necessary to wear a spinal orthosis, also called brace, and undergo sports or physical therapy.
Severe level: The side bend angle exceeds 40 degrees, and doctors will judge whether a surgery is needed in preventing deterioration, considering patient’s age, bone maturity, etc.