. Author manuscript; available in PMC: 2008 Aug 1.

Published in final edited form as: Community Dent Oral Epidemiol. 2008 Aug;36(4):305–316. doi: 10.1111/j.1600-0528.2007.00395.x

Table 7.

Poisson regression models for the extent and severity of impacts (n = 923)

	Extent: mean no. of OHIP items reported fairly/very often (pseudo-R² = 0.13)				Severity: mean total OHIP-14 score(pseudo-R² = 0.09)
	Coeff.	IRR^a	95% CI for IRR	P-value	Coeff.	IRR^a	95% CI for IRR	P-value
Constant	−1.93	–	–	–	1.54	–	–	–
Female	0.30	1.35	1.12–1.64	0.002	0.04	1.04	0.99–1.09	0.148
Low SES	0.28	1.33	1.09–1.62	0.005	0.11	1.11	1.06–1.17	<0.001
Episodic dental user	0.76	2.14	1.68–2.71	<0.001	0.40	1.49	1.41–1.57	<0.001
Any decayed surface (DS) at 32 years	0.63	1.88	1.50–2.36	<0.001	0.29	1.34	1.27–1.41	<0.001
No. of teeth missing (because of caries) by 32 years	0.12	1.12	1.09–1.15	<0.001	0.06	1.07	1.06–1.08	<0.001
Case of periodontal disease (2+ sites with 4+ mm CAL at 32 years)	0.14	1.14	0.86–1.52	0.349	0.13	1.14	1.05–1.23	0.002

Ratio of geometric mean values.