Table 3.

Known-groups validity:

OHIP5 scores in subjects who differed in their denture status, number of natural teeth present and treatment urgency in 403 subjects with OHIP5 data.

Variables	No	OHIP 5 mean ± sd	Effect size Cohen’s d (95%CI)
Presence of denture	396a		0.91 (0.16 to 1.66)
Yes	7	5.3 ± 4.5
No	389	2.7 ± 2.8
Number of natural teeth present	395b		1.35 (0.68 to 2.02)
Less than 20 teeth	9	6.4 ± 5.7
Equal or more than 20 teeth	386	2.6 ± 2.7
Treatment urgency	396a		−0.04 (−0.41 to 0.32)*
Urgent care	1	14.0 ± 0.0
Early care	31	2.8 ± 3.1
No obvious problem	364	2.7 ± 2.8

^*Excluding ‘Urgent care’ group because of too small number of subjects

Missing data for

^a7 and

^b8 subjects