In idiopathic scoliosis, which Cobb angle indicates a high risk of progression requiring treatment?

In idiopathic scoliosis, which Cobb angle indicates a high risk of progression requiring treatment?

• A. ≥10°
• B. ≥15°
• C. ≥25°
• D. ≥20°

Answer: (D)

In idiopathic scoliosis, how much the spine curves is not just a snapshot—it predicts how likely the curve is to get worse as a child grows. The Cobb angle is the standard measure of that curvature, and treatment decisions hinge on both how big the curve is and how much growth remains. A curve around twenty degrees marks a point where the chance of progression during ongoing growth becomes high enough that active treatment is appropriate. In skeletally immature patients, this level of curvature often prompts bracing or more frequent follow-up to slow or prevent further progression. Keep in mind that Cobb measurements have some variability, roughly a few degrees, so a repeat assessment is common to confirm progression risk. That’s why twenty degrees is used as the threshold indicating a high risk of progression requiring treatment.

In idiopathic scoliosis, how much the spine curves is not just a snapshot—it predicts how likely the curve is to get worse as a child grows. The Cobb angle is the standard measure of that curvature, and treatment decisions hinge on both how big the curve is and how much growth remains. A curve around twenty degrees marks a point where the chance of progression during ongoing growth becomes high enough that active treatment is appropriate. In skeletally immature patients, this level of curvature often prompts bracing or more frequent follow-up to slow or prevent further progression. Keep in mind that Cobb measurements have some variability, roughly a few degrees, so a repeat assessment is common to confirm progression risk. That’s why twenty degrees is used as the threshold indicating a high risk of progression requiring treatment.