The epidemiology of residual Plasmodium falciparum malaria transmission and infection burden in an African city with high coverage of multiple vector control measures

Table 1 Factors affecting numbers of Anopheles gambiae malaria vectors caught in Ifakara tent traps over 12,170 trap nights of capture in 1562 locations distributed across Dar es Salaam, Tanzania

Variable	Proportion (n)	Odds ratio [95 % CI]	P
Live in one of the original 15 Urban Malaria Control Programme (UMCP) study wards
New study ward	51.0 % (6211)	1.00 [NA]	NA
Old UMCP study ward	49.0 % (5959)	3.36 [2.14, 5.29]	0.033
Living in a ward with or without active Bti larvicide application
No larviciding	38.3 % (4664)	1.00 [NA]	NA
Granule application managed by contractor^a	19.9 % (2416)	0.83 [0.16, 4.2]	0.820
Granule application managed by Ministry of Health & Social Welfare (MoHSW)	5.9 % (717)	0.31 [0.14, 0.71]	0.0053
Pre-diluted liquid application managed by MoHSW	35.8 % (4373)	0.15 [0.07, 0.30]	0.000000079
Population-wide LLIN use ^b
Increase in coverage by final round	From 51.0 to 71.2 %	0.72 [0.51,1.01]	0.057

NA not applicable
^aExcluded from the final model by merging with reference group because non-significant, but presented here for illustrative purposes
^bAssociation with community-level mean LLIN scale-up, captured by fitting city-wide mean reported LLIN use the previous night as a continuous covariate, so the relative rate presented is that estimated based on community-wide usage in the last round of surveys (71.2 %) versus the first (51.0 %)

ISSN: 1475-2875