Table 2. Cox regression to verify the factors associated with the reduction in the number of Community Health Agents (CHAs) per family health teams in Brazil after the publication of the new PNAB, between October 2017 and December 2019.

		B	Default Error	p	HR	Confidence Interval 95%
						Bottom	Top
Region
North					1.000
	Northeast	0.000	0.032	0.990	1.000	0.939	1.064
	Midwest	0.228	0.039	< 0.001	1.256	1.164	1.356
	Southeast	0.078	0.034	0.020	1.081	1.012	1.154
	South	0.214	0.035	< 0.001	1.239	1.156	1.327
HDI
	High HDI	0.052	0.020	0.011	1.053	1.012	1.096
	Low HDI				1.00
Population Size
Up to 30 thousand inhabitants					1.000
	30,001 to 50 thousand inhabitants	-0.031	0.028	0.274	0.969	0.917	1.025
	50,001 to 100 thousand inhabitants	0.122	0.031	0.000	1.130	1.063	1.201
	> 100 thousand inhabitants	0.171	0.032	0.000	1.186	1.114	1.264

Note: Statistically significant: p < 0.05.