Table 4. 40-degree threshold regression model (radius).

Values are presented as number of patients with curve progression ≥40°/(total number of patients), 95% confidence interval for population proportion, and predicted % generated from regression model. Bold typed cells represent the radius grades and curve magnitude at initial presentation for which curve progression to ≥40° are likely to happen at a probability of ≥25%. those with wide 95% confidence intervals can be resulted from the few patients for accurate estimates.