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Table 2 Minimum Important Difference (MID's) and Effect Sizes (SRM's)

From: What is the relationship between the minimally important difference and health state utility values? The case of the SF-6D

Study/patient group

N

MID – Mean change in SF-6D (95% CI)*

Standard Deviation

Effect Size (SRM) (95% CI)*

0.5 of a Standard Deviation

Older adults 1st follow-up

1362

0.039 (0.034 to 0.044)

0.099

0.39 (0.35 to 0.45)

0.050

Older adults 2nd follow-up

948

0.026 (0.021 to 0.033)

0.096

0.27 (0.22 to 0.34)

0.048

IBS patients

56

0.023 (-0.001 to 0.050)

0.096

0.24 (-0.03 to 0.52)

0.048

IBS control patients

27

0.025 (-0.013 to 0.071)

0.113

0.22 (-0.15 to 0.62)

0.057

Leg ulcer patients

45

0.032 (-0.001 to 0.071)

0.131

0.24 (-0.06 to 0.53)

0.066

OA Knee patients

59

0.032 (0.015 to 0.049)

0.066

0.49 (0.22 to 0.73)

0.033

Limb reconstruction patients

29

0.048 (0.007 to 0.091)

0.120

0.40 (-0.02 to 0.79)

0.060

Early (RA) patients

99

0.039 (0.017 to 0.061)

0.112

0.33 (0.14 to 0.58)

0.056

COPD Patients

29

0.010 (-0.019 to 0.043)

0.087

0.11 (-0.28 to 0.47)

0.044

  1. *Bootstrap Bias-Corrected and accelerated (BCA) 95% Confidence Intervals.