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Table 4 Correlationsa between the COMI and the related questionnaires and domains

From: Development of the Japanese Core Outcome Measures Index (COMI): cross-cultural adaptation and psychometric validation

  COMI
  Pain Function Symptom-specific well-being QOL Disability Summary
EQ-5D Summary index −0.60 −0.58 −0.54 − 0.60 − 0.48 − 0.72
RDQ 0.64 0.63 0.52 0.52 0.54 0.71
SF-8 PCS −0.55 −0.62 −0.48 − 0.50 −0.43 − 0.66
SF-8 MCS −0.36 − 0.46 −0.33 − 0.54 −0.34 − 0.52
STarT Total 0.63 0.60 0.53 0.57 0.48 0.71
STarT Sub score (psychological) 0.56 0.56 0.50 0.55 0.43 0.67
  1. All the correlations were significant (P < 0.001)
  2. aSpearman Rank correlation coefficients
  3. COMI: Core Outcome Measures Index; QOL: quality of life; EQ-5D: the EuroQol 5 Dimension; RDQ: Roland Morris Disability Questionnaire; SF-8: Short Form 8™ Health Survey; PCS: physical component summary; MCS: mental component summary; STarT: the Keele STarT Back Screening Tool
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