The core outcome measures index (COMI) is a validated multidimensional instrument for assessing patient-reported outcome in patients with back problems. The aim of the present study is to translate the COMI into Dutch and validate it for use in native Dutch speakers with low back pain.
The COMI was translated into Dutch following established guidelines and avoiding region-specific terminology. A total of 89 Dutch-speaking patients with low back pain were recruited from 8 centers, located in the Dutch-speaking part of Belgium. Patients completed a questionnaire booklet including the validated Dutch version of the Roland Morris disability questionnaire, EQ-5D, the WHOQoL-Bref, the Numeric Rating Scale (NRS) for pain, and the Dutch translation of the COMI. Two weeks later, patients completed the Dutch COMI translation again, with a transition scale assessing changes in their condition.
The patterns of correlations between the individual COMI items and the validated reference questionnaires were comparable to those reported for other validated language versions of the COMI. The intraclass correlation for the COMI summary score was 0.90 (95% CI 0.84–0.94). It was 0.75 and 0.70 for the back and leg pain score, respectively. The minimum detectable change for the COMI summary score was 1.74. No significant differences were observed between repeated scores of individual COMI items or for the summary score.
The reproducibility of the Dutch translation of the COMI is comparable to that of other validated spine outcome measures. The COMI items correlate well with the established item-specific scores. The Dutch translation of the COMI, validated by this work, is a reliable and valuable tool for spine centers treating Dutch-speaking patients and can be used in registries and outcome studies.
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Adjustments to validated Dutch translation: Q2: ‘Ergste pijn die ik mij kan voorstellen’ instead of ‘Ergste pijn die u zich kan voorstellen’; Q4: ‘Enigszins tevreden/ontevreden’ instead of ‘Tevreden/Ontevreden’; Q5: ‘Als u aan de afgelopen week terugdenkt, hoe zou u uw levenskwaliteit inschatten/beoordelen?’ instead of ‘Hoe zou u uw levenskwaliteit van de afgelopen week inschatten/beoordelen?’; Q7: ‘Hoeveel dagen van de laatste 4 weken heeft uw rugprobleem u belet om te werken?’ instead of ‘Hoeveel dagen van de laatste 4 weken kon u niet werken omwille van uw rugprobleem?’
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There was no funding for this study and the authors declare to have no financial relations of any kind related to the subject of this study.
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Van Lerbeirghe, J., Van Lerbeirghe, J., Van Schaeybroeck, P. et al. Cross-cultural adaptation and validation of the Dutch version of the core outcome measures index for low back pain. Eur Spine J 27, 76–82 (2018). https://doi.org/10.1007/s00586-017-5255-8
- Low back pain
- Core outcome measures index
- Cross-cultural adaptation