TABLE 5.

Validity Statistics of ZBI Short Versions

ZBI versions	No. items	Cronbach’s α	ZBI-22*	HADS-A*	HADS-D*	AUC†
ZBI-9	9	0.87	0.95	0.62	0.57	0.79
ZBI-22	22	0.93	–	0.65	0.59	0.81
Other short versions
Bedard et al, 20014	12	0.90	0.97	0.63	0.58	0.81
Ballesteros et al, 201210	12	0.92	0.97	0.64	0.59	0.80
Hebert et al, 200023	12	0.92	0.97	0.65	0.60	0.81

^*Represents Pearson’s correlations. All correlations are statistically significant (P<0.001).

^†AUC=area under curve analysis.