Table 4 Epidemiology of AIS

Prevalence (curve of 10 degrees)

1.7% 1436 of 82,901 subjects

Prevalence (curve of 10–19 degrees or more)

1.5% 1255 of 82,901 subjects

Girls to boys (overall)

2.1:1

Girls to boys (curves less than 10 degrees)

1.5:1

Girls to boys (curves 10 to 19 degrees)

2.7:1

Girls to boys (curves 20 to 29 degrees)

7.5:1

Girls to boys (curves 30 to 39 degrees)

5.5:1

Girls to boys (curves 40+)

1.2:1

Most common curve of at least 10 degrees

Thoracolumbar (34.3%) (n = 493)

Second most common curve

Lumber (33.1%) (n = 475)

Third most common curve

Thoracic (18.2%) (n = 261)

Fourth most common curve

Double curve (14.4%) (n = 207)