Table 1. List of Selected Sites and their Required Sample Size for the 2013 EWI Survey (Adopted from the WHO EWI HIVDR Guidelines, 2010).

Region	N°	Name of the selected sites	Geographic location of site (Urban or Rural)	Healthcare category (Primary, Secondary, or Tertiary)	Patients enrolled on ART in 2012	Sample size (WHO guidelines)
Centre	1	Yaoundé Central Hospital	Urban	Secondary	1921	180
	2	National Social Welfare Hospital	Urban	Secondary	796	160
	3	Yaoundé Jamot Hospital	Urban	Secondary	938	175
	4	Yaounde General Hospital	Urban	Tertiary	421	140
	5	Yaoundé Pediatric and Gyneco-Obstetric Hospital	Urban	Tertiary	263	120
	6	University Health Centre—Yaoundé	Urban	Tertiary	634	155
	7	Cité Verte District Hospital	Urban	Primary	435	145
	8	Mbalmayo District Hospital	Rural	Primary	323	130
	9	Obala District Hospital	Rural	Primary	254	120
Littoral	10	Douala Laquintinie Hospital	Urban	Secondary	615	155
	11	Douala General Hospital	Urban	Tertiary	377	135
	12	Nylon District Hospital	Urban	Primary	958	175
	13	Saint jean Malte Hospital of Njombe	Rural	Primary	260	120
	14	Nkongsamba District Hospital	Rural	Primary	381	135
	15	Edéa District Hospital	Rural	Primary	292	120
Total						2165

EWI, early warning indicator; WHO, World Health Organization; HIVDR, HIV drug resistance; ‘‘Urban” referred to city/township settings; ‘‘Rural” referred to peripheral/village settings; ‘‘Primary” referred to first-level health facilities; ‘‘Secondary” referred to medium/intermediate level health facilities; ‘‘Tertiary” referred to high/reference level health facilities.