In this study iliopsoas muscle strength was measured by portable dynamometer and it was explored to what extent independent
predictors (age, body weight, body height and body mass index) affect iliopsoas strength in healthy subjects
and in subjects with adolescent idiopathic scoliosis. The study population was consisted of 183 girls (90 healthy girls
and 93 girls with adolescent idiopathic scoliosis). Student t test analysis showed no differences in maximal voluntary
isometric contraction between healthy girls and girls with scoliosis. Independent variables predicted significantly iliopsoas
strength in healthy group (r=0.96, p<0.01) and in scoliosis group (r=0.94, p<0.001). Separate analysis with respect
to types of scoliosis demonstrated that independent variables significantly predict iliopsoas strength in right thoracic
(r=0.97, p<0.01), left thoracic (r=0.98, p=0.004), right thoracic lumbar (r=0.97, p<0.01) and left lumbar (r=0.96,
p<0.01) scoliosis subgroups. In healthy girls iliopsoas strength was mostly predicted by body weight, followed by body
height and body mass index. In girls with scoliosis body weigth was the strongest predictor of iliopsoas strength and was
followed by curvature angle degree
