Methods: Eighty-six girls (13.9
±
1.9 years of age) and 63 boys (13.7
±
1.7 years of age) participated.
LBP was assessed by questionnaire, and disability using the Roland-Morris Disability
Questionnaire. QoL was assessed by the Pediatric Quality of Life Inventory (PedsQL). Multivariate
analyses of variance and covariance were used to assess differences between groups.