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Table 4 Minimally important changes for those who reported some change

From: Validity and responsiveness of EQ-5D-5L and SF-6D in patients with health complaints attributed to their amalgam fillings: a prospective cohort study of patients undergoing amalgam removal

  Correlations (ρ)a 0.5 SD Anchor-based method Predictive modelling
GRC1 GRC2 MIC MIC 95% CI MIC 95% CI
EQ-5D-5L 0.53 0.49 0.108 0.118 0.038–0.198 0.103 0.062–0.237
EQ-5D-CW 0.52 0.45 0.115 0.124 0.036–0.213 0.101 0.018–0.325
SF-6D 0.45 0.51 0.048 0.064 0.029–0.099 0.056 0.020–0.143
GHCr-index 0.36 0.31 8.876 9.158 1.798–16.517 8.786 3.096–17.804
EQ-VAS 0.45 0.36 9.106 8.789 2.580–14.999 9.076 3.525–18.624
  1. a Correlations of GRC variables with score changes of utility and criteria variables (a value of ρ 0.30 and above is sufficiently large to use the anchors for the calculation of MIC). GRC Global rating of change (1 = evaluation of amalgam removal results, & 2 = item-2 of the SF-36); CI (bootstrapped) confidence interval (with 1000 iterations); SD (baseline) standard deviation; MIC minimally important change; EQ-5D-5L EuroQol 5-dimensional 5-level questionnaire; SF-6D Short-form 6-dimension; GHCr (reversed) general health complaints; EQ-VAS (EuroQol) visual analogue scale