Background: Community-based studies of patellofemoral pain (PFP) need a questionnaire tool that discriminates between those with and those without the condition. To overcome these issues, we have designed a self-report questionnaire which aims to identify people with PFP in the community. Methods: Study designs: comparative study and cross-sectional study. Study population: comparative study: PFP patients, soft-tissue injury patients and adults without knee problems. Cross-sectional study: adults attending a science festival. Intervention: comparative study participants completed the questionnaire at baseline and two weeks later. Cross-sectional study participants completed the questionnaire once. The optimal scoring system and threshold was explored using receiver operating characteristic curves, test-retest reliability using Cohen's kappa and measurement error using Bland-Altman plots and standard error of measurement. Known-group validity was explored by comparing PFP prevalence between genders and age groups. Results: Eighty-four participants were recruited to the comparative study. The receiver operating characteristic curves suggested limiting the questionnaire to the clinical features and knee pain map sections (AUC 0.97 95 % CI 0.94 to 1.00). This combination had high sensitivity and specificity (over 90 %). Measurement error was less than the mean difference between the groups. Test-retest reliability estimates suggest good agreement (N = 51, k = 0.74, 95 % CI 0.52-0.91). The cross-sectional study (N = 110) showed expected differences between genders and age groups but these were not statistically significant. Conclusion: A shortened version of the questionnaire, based on clinical features and a knee pain map, has good measurement properties. Further work is needed to validate the questionnaire in community samples.
|Journal||BMC Musculoskeletal Disorders|
|Early online date||31 May 2016|
|Publication status||Published - 2016|
- Patellofemoral pain
- Sensitivity and specificity
- Validation studies
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A questionnaire to identify patellofemoral pain in the community: an exploration of measurement properties
Dey, P. (Contributor), Callaghan, M. (Contributor), Cook, N. (Contributor), Sephton, R. (Contributor), Sutton, C. (Contributor), Hough, E. (Contributor), James, J. (Contributor), Saqib, R. (Contributor) & James, J. (Contributor), figshare , 31 May 2016
DOI: 10.6084/m9.figshare.c.3605150.v1, https://figshare.com/collections/A_questionnaire_to_identify_patellofemoral_pain_in_the_community_an_exploration_of_measurement_properties/3605150/1