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Table 4 Epidemiology of AIS

From: Adolescent idiopathic scoliosis screening for school, community, and clinical health promotion practice utilizing the PRECEDE-PROCEED model

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)
  1. Source: [30] Soucacos et al, 2000