Table 5 MCIDs estimation of the QLICD-SLE and relevant indicators by ROC curve method (n = 181).

From: Establishing minimal clinically important differences for the quality of life scale QLICD-SLE for patients with systemic lupus erythematosus based on ROC curve

Indicators

Value

Physical domain

Psychological domain

Social domain

Sub-total (QLICD-GM)

Specific module

Total (QLICD-SLE)

Area under the ROC curve (AUC)

0.822

0.826

0.820

0.886

0.843

0.898

Significance level P (Area = 0.5)

 < 0.001

 < 0.001

 < 0.001

 < 0.001

 < 0.001

 < 0.001

Youden index J

0.489

0.580

0.556

0.680

0.578

0.669

Associated criterion (MCID)

8.3

2.3

2.5

2.7

9.2

3.2

Sensitivity

66.7%

100%

91.7%

100%

75.0%

100%

Specificity

82.3%

57.9%

63.9%

68.1%

82.8%

66.9%

  1. Sub-total is the sum of the three domains of the QLICD-GM (general module), Total (QLICD-SLE) is the sum of the QLICD-GM and the specific module.
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