The Italian version of the Quebec Back Pain Disability Scale: cross-cultural adaptation, reliability and validity in patients with chronic low back pain

Marco Monticone, Luca Frigau, Francesco Mola, Barbara Rocca, Franco Franchignoni, Salvatore Simone Vullo, Calogero Foti, Alessandro Chiarotto

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

BACKGROUND AND AIM: Growing attention is being given to physical functioning measures to assess interventions for low back pain (LBP). The Quebec Back Pain Disability Questionnaire (QBPDS) has never been validated in Italian patients, and the aim of the study was culturally adapting and validating the Italian version of the QBPDS (QBPDS-I), to allow its use with Italian-speaking patients with chronic LBP.

METHODS: The QBPDS-I was developed by means of forward-backward translation, a final review by an expert committee and a test of the prefinal version to evaluate its comprehensibility. The psychometric testing included structural validity by exploratory factor analysis (EFA), reliability by internal consistency (Cronbach's alpha) and test-retest reliability (intraclass correlation coefficient, ICC 2.1), measurement error by calculating the minimum detectable change (MDC), construct validity by assessing hypotheses of QBPDS correlations with the Roland Morris Disability Scale (RMDQ), the Oswestry Disability Questionnaire (ODI) and a pain numerical rating scale (NRS) (Spearman's correlations).

RESULTS: It took one month to develop a consensus-based version of the QBPDS-I. The questionnaire was administered to 201 subjects with chronic LBP and was well accepted. EFA suggested a one-factor 20-item solution (first factor variance explained = 54.7%). Internal consistency (α = 0.95) and test-retest reliability (ICC = 0.90) were excellent. The MDC was 12 scale points. Construct validity was good as all of the hypotheses were met; correlations: RMDQ (r = 0.40), ODI (r = 0.48) and NRS (r = 0.44).

CONCLUSIONS: The QBPDS-I is unidimensional, reliable and valid in patients with chronic LBP. Its use is recommended for clinical and research purposes.

Original languageEnglish
JournalEuropean Spine Journal
DOIs
Publication statusE-pub ahead of print - 26 Sep 2019

Cite this

Monticone, Marco ; Frigau, Luca ; Mola, Francesco ; Rocca, Barbara ; Franchignoni, Franco ; Vullo, Salvatore Simone ; Foti, Calogero ; Chiarotto, Alessandro. / The Italian version of the Quebec Back Pain Disability Scale : cross-cultural adaptation, reliability and validity in patients with chronic low back pain. In: European Spine Journal. 2019.
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title = "The Italian version of the Quebec Back Pain Disability Scale: cross-cultural adaptation, reliability and validity in patients with chronic low back pain",
abstract = "BACKGROUND AND AIM: Growing attention is being given to physical functioning measures to assess interventions for low back pain (LBP). The Quebec Back Pain Disability Questionnaire (QBPDS) has never been validated in Italian patients, and the aim of the study was culturally adapting and validating the Italian version of the QBPDS (QBPDS-I), to allow its use with Italian-speaking patients with chronic LBP.METHODS: The QBPDS-I was developed by means of forward-backward translation, a final review by an expert committee and a test of the prefinal version to evaluate its comprehensibility. The psychometric testing included structural validity by exploratory factor analysis (EFA), reliability by internal consistency (Cronbach's alpha) and test-retest reliability (intraclass correlation coefficient, ICC 2.1), measurement error by calculating the minimum detectable change (MDC), construct validity by assessing hypotheses of QBPDS correlations with the Roland Morris Disability Scale (RMDQ), the Oswestry Disability Questionnaire (ODI) and a pain numerical rating scale (NRS) (Spearman's correlations).RESULTS: It took one month to develop a consensus-based version of the QBPDS-I. The questionnaire was administered to 201 subjects with chronic LBP and was well accepted. EFA suggested a one-factor 20-item solution (first factor variance explained = 54.7{\%}). Internal consistency (α = 0.95) and test-retest reliability (ICC = 0.90) were excellent. The MDC was 12 scale points. Construct validity was good as all of the hypotheses were met; correlations: RMDQ (r = 0.40), ODI (r = 0.48) and NRS (r = 0.44).CONCLUSIONS: The QBPDS-I is unidimensional, reliable and valid in patients with chronic LBP. Its use is recommended for clinical and research purposes.",
keywords = "Chronic low back pain, Cross-cultural adaptation, Reliability, Sensitivity to change, Validity",
author = "Marco Monticone and Luca Frigau and Francesco Mola and Barbara Rocca and Franco Franchignoni and Vullo, {Salvatore Simone} and Calogero Foti and Alessandro Chiarotto",
year = "2019",
month = "9",
day = "26",
doi = "10.1007/s00586-019-06153-4",
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The Italian version of the Quebec Back Pain Disability Scale : cross-cultural adaptation, reliability and validity in patients with chronic low back pain. / Monticone, Marco; Frigau, Luca; Mola, Francesco; Rocca, Barbara; Franchignoni, Franco; Vullo, Salvatore Simone; Foti, Calogero; Chiarotto, Alessandro.

In: European Spine Journal, 26.09.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The Italian version of the Quebec Back Pain Disability Scale

T2 - cross-cultural adaptation, reliability and validity in patients with chronic low back pain

AU - Monticone, Marco

AU - Frigau, Luca

AU - Mola, Francesco

AU - Rocca, Barbara

AU - Franchignoni, Franco

AU - Vullo, Salvatore Simone

AU - Foti, Calogero

AU - Chiarotto, Alessandro

PY - 2019/9/26

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N2 - BACKGROUND AND AIM: Growing attention is being given to physical functioning measures to assess interventions for low back pain (LBP). The Quebec Back Pain Disability Questionnaire (QBPDS) has never been validated in Italian patients, and the aim of the study was culturally adapting and validating the Italian version of the QBPDS (QBPDS-I), to allow its use with Italian-speaking patients with chronic LBP.METHODS: The QBPDS-I was developed by means of forward-backward translation, a final review by an expert committee and a test of the prefinal version to evaluate its comprehensibility. The psychometric testing included structural validity by exploratory factor analysis (EFA), reliability by internal consistency (Cronbach's alpha) and test-retest reliability (intraclass correlation coefficient, ICC 2.1), measurement error by calculating the minimum detectable change (MDC), construct validity by assessing hypotheses of QBPDS correlations with the Roland Morris Disability Scale (RMDQ), the Oswestry Disability Questionnaire (ODI) and a pain numerical rating scale (NRS) (Spearman's correlations).RESULTS: It took one month to develop a consensus-based version of the QBPDS-I. The questionnaire was administered to 201 subjects with chronic LBP and was well accepted. EFA suggested a one-factor 20-item solution (first factor variance explained = 54.7%). Internal consistency (α = 0.95) and test-retest reliability (ICC = 0.90) were excellent. The MDC was 12 scale points. Construct validity was good as all of the hypotheses were met; correlations: RMDQ (r = 0.40), ODI (r = 0.48) and NRS (r = 0.44).CONCLUSIONS: The QBPDS-I is unidimensional, reliable and valid in patients with chronic LBP. Its use is recommended for clinical and research purposes.

AB - BACKGROUND AND AIM: Growing attention is being given to physical functioning measures to assess interventions for low back pain (LBP). The Quebec Back Pain Disability Questionnaire (QBPDS) has never been validated in Italian patients, and the aim of the study was culturally adapting and validating the Italian version of the QBPDS (QBPDS-I), to allow its use with Italian-speaking patients with chronic LBP.METHODS: The QBPDS-I was developed by means of forward-backward translation, a final review by an expert committee and a test of the prefinal version to evaluate its comprehensibility. The psychometric testing included structural validity by exploratory factor analysis (EFA), reliability by internal consistency (Cronbach's alpha) and test-retest reliability (intraclass correlation coefficient, ICC 2.1), measurement error by calculating the minimum detectable change (MDC), construct validity by assessing hypotheses of QBPDS correlations with the Roland Morris Disability Scale (RMDQ), the Oswestry Disability Questionnaire (ODI) and a pain numerical rating scale (NRS) (Spearman's correlations).RESULTS: It took one month to develop a consensus-based version of the QBPDS-I. The questionnaire was administered to 201 subjects with chronic LBP and was well accepted. EFA suggested a one-factor 20-item solution (first factor variance explained = 54.7%). Internal consistency (α = 0.95) and test-retest reliability (ICC = 0.90) were excellent. The MDC was 12 scale points. Construct validity was good as all of the hypotheses were met; correlations: RMDQ (r = 0.40), ODI (r = 0.48) and NRS (r = 0.44).CONCLUSIONS: The QBPDS-I is unidimensional, reliable and valid in patients with chronic LBP. Its use is recommended for clinical and research purposes.

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KW - Cross-cultural adaptation

KW - Reliability

KW - Sensitivity to change

KW - Validity

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