Table 5.

Construct and criterion validity. Comparison of OIDP scores and self-rated measures of oral health and needs (n = 285)

	Mean (SD)	Quartiles	P value
Perceived dental treatment need
Not at all	0.7 (2.0)	(0.0, 0.0, 0.0)	< 0.001
Very little	1.3 (1.6)	(0.0, 0.0, 2.0)
To some extent	4.6 (4.8)	(1.5, 3.3, 6.5)
Considerably and a great deal	8.9 (8.1)	(3.7, 6.9, 10.2)
Perceived oral health
Very poor	9.6 (6.3)	(4.4, 9.5, 14.2)	< 0.001
Poor	8.9 (8.2)	(4.0, 6.6, 9.8)
Fair	3.4 (4.4)	(0.0, 2.1, 4.7)
Good	1.7 (2.6)	(0.0, 0.0, 1.8)
Very good	0.0 (0.0)	(0.0, 0.0, 0.0)
Perceived oral health vs. general health
Superior	1.4 (2.9)	(0.0, 0.0, 1.8)	< 0.001
Equal	3.2 (5.6)	(0.0, 1.8, 4.4)
Inferior	7.9 (7.7)	(1.8, 6.6, 11.2)
Perceived general health
Poor and Fair	7.3 (7.4)	(1.3, 4.4, 10.9)	<0.001
Good	3.7 (5.7)	(0.0, 2.2, 5.3)
Very good	2.0 (3.1)	(0.0, 0.0, 3.6)
Satisfaction with mouth/teeth
Not at all	8.5 (8.3)	(4.0, 6.5, 9.1)	< 0.001
Very little and To some extent	5.3 (6.1)	(1.5, 4.1, 7.9)
Considerably	1.1 (2.1)	(0.0, 0.0, 1.8)
A great deal	0.7 (2.0)	(0.0, 0.0, 0.0)
Prevalence of pain in mouth
No	1.5 (3.0)	(0.0, 0.0, 1.8)	< 0.001
Yes, not severe	3.2 (3.8)	(0.0, 1.8, 5.1)
Yes, severe	7.7 (8.3)	(2.6, 4.5, 8.7)
Yes, very severe	10.7 (8.6)	(5.5, 9.8, 13.1)