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)

Source: [30] Soucacos et al, 2000

Mirtz et al. Chiropractic & Osteopathy 2005 13:25   doi:10.1186/1746-1340-13-25