Physiotherapy theory and practice · 2022
The Dutch language version of the Pain Disability Index (PDI-DLV): psychometric properties in breast cancer patients.
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Van der Gucht Elien, Dams Lore, Bernar Koen, De Vrieze Tessa, Haenen Vincent, De Groef An, Godderis Lode, Morlion Bart, Meeus Mira, Devoogdt Nele
Аннотация
BACKGROUND: Pain after breast cancer surgery is a common and disabling problem. A reliable and valid questionnaire to assess pain-related disability is the Pain Disability Index (0-70). However, properties of the Dutch version (PDI-DLV) have never been investigated in this population.
OBJECTIVE: To assess psychometric properties of the PDI-DLV after breast cancer surgery.
METHODS: For reliability, relative and absolute reliability were calculated with a one-week test-retest interval, as well as internal consistency. Moreover, content and construct validity were examined to evaluate validity.
RESULTS: One hundred twenty-three women were included. Relative reliability was good (intraclass correlation coefficient = 0.80). Standard error of measurement and minimal detectable change (absolute reliability) were 5.57 and 15.45 points, respectively. The mean difference between two measurements was -1.98 points, with 95% limits of agreement equal to 13.19 and -17.15. The within-subjects coefficient of variation was 59%. Internal consistency was confirmed (α = 0.87). The PDI-DLV was scored as understandable and complete (content validity). Construct validity was supported by confirmation of more than 75% of the tested hypotheses and of the one-factor model.
CONCLUSION: The PDI-DLV is a valid questionnaire to assess pain-related disability 1 year after breast cancer surgery. Although absolute reliability is disputable, its good relative reliability allows evaluating changes between subjects.
OBJECTIVE: To assess psychometric properties of the PDI-DLV after breast cancer surgery.
METHODS: For reliability, relative and absolute reliability were calculated with a one-week test-retest interval, as well as internal consistency. Moreover, content and construct validity were examined to evaluate validity.
RESULTS: One hundred twenty-three women were included. Relative reliability was good (intraclass correlation coefficient = 0.80). Standard error of measurement and minimal detectable change (absolute reliability) were 5.57 and 15.45 points, respectively. The mean difference between two measurements was -1.98 points, with 95% limits of agreement equal to 13.19 and -17.15. The within-subjects coefficient of variation was 59%. Internal consistency was confirmed (α = 0.87). The PDI-DLV was scored as understandable and complete (content validity). Construct validity was supported by confirmation of more than 75% of the tested hypotheses and of the one-factor model.
CONCLUSION: The PDI-DLV is a valid questionnaire to assess pain-related disability 1 year after breast cancer surgery. Although absolute reliability is disputable, its good relative reliability allows evaluating changes between subjects.