Table 3. Coefficient and errors obtained in the Prais-Winsten regression, annual percentage variation, p-value and 95% confidence interval of the trend analysis for the rates of potential years of life lost due to mouth and pharynx cancer. Brazil, 1979–2013.

Variable	Regression coefficient	Standard error	p	Annual percentage variation	95%CI
Region
North	0.0070377	0.0018149	0.000	1.63	0.70–2.57
Northeast	0.0138159	0.0017684	0.000	3.23	2.31–4.16
Southeast	-0.0000539	0.0008691	0.951	-0.01	-0.45–0.43
South	0.0012696	0.0009869	0.207	0.29	-0.21–0.79
Midwest	0.0112856	0.0015774	0.000	2.63	1.81–3.46
Site
Mouth	0.0011698	0.0008179	0.162	0.27	-0.14–0.69
Pharynx	0.0045502	0.0010925	0.000	1.05	0.49–1.61
Sex
Male	0.0030967	0.0009166	0.002	0.72	0.25–1.18
Female	0.0048772	0.0005882	0.000	1.13	0.83–1.43
Overall	0.0030144	0.0008302	0.001	0.71	0.32–1.11