Persian adaptation of Quality of Life Profile for Spinal Deformities questionnaire.

Background: The Quality of Life Profile for Spinal Deformities (QLPSD) is the first specific questionnaire to evaluate health-related quality-of-life (HRQoL) in adolescents with spinal deformities. Measuring HRQoL is important because spinal deformities and their management may negatively affect quality of life (QoL), thereby importantly affecting treatment effectiveness.

Objective: This study aimed to examine the validity and reliability of a Persian version of the QLPSD through patients with adolescent idiopathic scoliosis and Scheuermann's kyphosis.

Methods: A cross-sectional design was used to determine the validity and reliability of the Persian version of the QLPSD based on the IQOLA protocols.

Results: The QLPSD was successfully culturally adapted, showing acceptable internal consistency (cronbach's α= 0.88) and intraclass correlation coefficients (ICC = 0.91). Concurrent validity was supported by comparing scores on corresponding dimensions of the Persian versions of QLPSD and the Scoliosis Research Society-22r (SRS-22r) questionnaires (function, pain, and body-image). Discriminant validity was supported though observation of significant differences between participants who had different clinical characteristics (p< 0.05).

Conclusions: The Persian QLPSD is valid and reliably measures QoL among adolescents with spinal deformities; it may be used in clinical evaluations and future research.