. Author manuscript; available in PMC: 2016 Jan 31.

Published in final edited form as: Community Dent Oral Epidemiol. 2014 Dec 3;43(1):24–32. doi: 10.1111/cdoe.12135

Table 5.

Incidence rate ratio and 95% confidence interval for extent of dft and DMFT in Pennsylvania

	Caries Extent

Predictor	IRR (95% CI)	p-value
	dft^a
Appalachian counties (vs. Non-Appalachian counties)	1.10 (1.01–1.19)	0.024
Age, years (per 1 year increase)	0.96 (0.92–0.99)	0.012

	DMFT^b
Appalachian counties (vs. Non-Appalachian counties)	1.07 (0.95–1.22)	0.27
Age, years (per 1 year increase)	1.14 (1.12–1.16)	<0.001

Note.

Adjusted for age and Appalachian residency in the logistic portion of the model.

Adjusted for age, age², and Appalachian residency in the logistic portion of the model.