Table 1. Number of primary health care units selected, non-response and response rates by macroregion. Brazil, 2009.

Macroregion	Number of PHCUs selected	%	Non-response	%	Response rate (%)
Midwest	110	6.9	13	3.7	88.2
Northeast	629	39.3	174	49.9	72.3
North	138	8.6	58	16.6	58.0
Southeast	473	29.6	79	22.6	83.3
South	250	15.6	25	7.2	90.0
Total	1,600	100.0	349	100.0	78.2

PHCU: Primary health care unit