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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