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Table 2 The reliability and criterion validity of Chinese version of SCPI

From: Reliability and validity of the Chinese version of the LMC Skills, Confidence & Preparedness Index (SCPI) in patients with type 2 diabetes

  Measure Coefficient
Internal consistency for subscales
 Skills (9 items) Cronbach’s alpha 0.88
 Confidence (7 items) Cronbach’s alpha 0.81
 Preparedness (7 items) Cronbach’s alpha 0.86
 Overall (23 items) Cronbach’s alpha 0.92
Test–retest reliability (n = 23) Pearson’s correlation; p value r = 0.61; p = 0.002
Criterion validity
 DES-SF (n = 242) Spearman’s rank correlation; p value 0.376; p < 0.001
 DKTa (n = 121) Spearman’s rank correlation; p value 0.284; p < 0.001
 DKTb (n = 118) Spearman’s rank correlation; p value 0.351; p < 0.001
 SDSCA (n = 23) Spearman’s rank correlation; p value 0.465; p = 0.025
  1. DKT a means diabetic patients without insulin completed the first 14 questions; DKT b means diabetic patients using insulin completed all 23 questions