Table 3.

Internal reliability analysis of COHIP-SF 19 JP and each subscale (n = 379)

Scale (number of items)	Cronbach’s alpha	Item-test correlation	Item-rest correlation	Alpha if item deleted
Total COHIP-SF 19 JP (19)	0.77	0.08–0.68	0.04–0.60	0.74–0.79
Oral health (5)	0.57	0.36–0.56	0.23–0.45	0.75–0.77
Functional well-being (4)	0.45	0.31–0.48	0.24–0.37	0.76–0.77
Socio-emotional well-being (10)	0.68	0.08–0.68	0.04–0.60	0.74–0.79