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

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

 DKT^a (n = 121)

Spearman’s rank correlation; p value

0.284; p < 0.001

 DKT^b (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