Personality Characteristics and Oral Health-Related Quality of Life in an Iranian Adult Population

Table 4

Final modelling of OHIP-14 score based on associated variables using the backward method.

Variables	IRR (95% CI)	value
Losing a tooth
No	Reference
Yes	1.31 (1.10, 1.57)	0.003
Self-assessment of oral health
Poor	Reference
Fair	0.81 (0.67, 0.97)	0.021
Good	0.70 (0.59, 0.84)	<0.0001
Very good	0.76 (0.54, 1.07)	0.122
Excellent	0.88 (0.54, 1.43)	0.601
PAS	0.98 (0.97, 0.99)	0.028
NAS	1.01 (1.00, 1.02)	0.035

Correlation is significant at the 0.01 level. Correlation is significant at the 0.05 level.