Reliability, validity and responsiveness of the cross-culturally adapted Italian version of the core outcome measures index (COMI) for the neck

Marco Monticone, Simona Ferrante, Serena Maggioni, Gisel Grenat, Giovanni A Checchia, Marco Testa, Marco G Teli, Anne F Mannion

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


PURPOSE: Evaluation of the psychometric properties of a cross-culturally adapted questionnaire, the Core Outcome Measurement Index for neck pain (COMI-neck).

METHODS: The COMI-neck was cross-culturally adapted for the Italian language using established procedures. The following psychometric properties of the instrument were then assessed in patients with chronic neck pain undergoing rehabilitation: test-retest reliability (intraclass correlation coefficient, ICC); construct validity by comparing COMI-neck with the Neck Pain and Disability Scale, a numerical pain rating scale, and the EuroQol-Five Dimension (Pearson's correlations); and responsiveness by means of Standardized Response Mean (SRM), unpaired t tests, and Receiver Operating Characteristics (ROC) curves.

RESULTS: The questionnaire was completed by 103 subjects. The COMI-neck summary score displayed no relevant floor or ceiling effects. Test-retest reliability was excellent (ICC = 0.87). With one exception (symptom-specific well-being), the individual COMI items and the COMI summary score correlated to the expected extent with the scores of the reference questionnaires (r = 0.40-0.80). The mean change scores for the Italian COMI-neck differed significantly between patients with a good global outcome and those with a poor outcome (p = 0.002); SRM for the good outcome group was 1.23, and for the poor outcome group 0.40. ROC analysis revealed an area under the curve of 0.73 (95% CI: 0.62-0.85).

CONCLUSIONS: This study provides evidence that the Italian version of the COMI-neck is a valid and responsive questionnaire in the population of patients examined. Its use is recommended for clinical and research purposes.

Original languageEnglish
Pages (from-to)863-872
Number of pages10
JournalEuropean Spine Journal
Issue number4
Publication statusPublished - Apr 2014


  • Adult
  • Aged
  • Chronic Pain
  • Culture
  • Disability Evaluation
  • Female
  • Humans
  • Italy
  • Language
  • Male
  • Middle Aged
  • Neck Pain
  • Outcome Assessment (Health Care)
  • Pain Measurement
  • Psychometrics
  • ROC Curve
  • Reproducibility of Results
  • Surveys and Questionnaires
  • Young Adult


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