Intra- and inter-rater reliability of the Individual Lifestyle Profile (ILP) questionnaire for individuals with musculoskeletal pain

ABSTRACT The aim of this study was to test all the reliability properties of the Individual Lifestyle Profile (ILP) in patients with musculoskeletal pain. A total of 105 patients with musculoskeletal pain participated in this study after being recruited from a public secondary physical therapy care. ILP was applied by Rater 1 at the initial assessment and by Rater 2 after one hour. After three to seven days of the initial assessment, Rater 1 reapplied ILP. ILP and its components showed internal consistency from 0.27 to 0.61 and intra- and inter-rater reliability values from moderate to excellent (ICC=0.68 to 0.90) and from moderate to almost perfect (K=0.59 to 0.83). Percent agreement was 61% to 98%, the SEM of ILP was 4.1 points and the MDC was 5.7 points. We conclude that ILP is a reliable instrument to assess the lifestyle of patients with musculoskeletal pain.