Achieving high coverage of larval-stage mosquito surveillance: challenges for a community-based mosquito control programme in urban Dar es Salaam, Tanzania

Table 6 Impact of larviciding on late stage Anopheles larvae occupancy.

Variable	Proportion occupied % (n/N)	OR [95% CI]	P
Intervention status
Non-larviciding	4.1 (44/1070)	1.00^a	NA
Larviciding area	5.9(111/1895)	2.32 [2.19,6.14]	< 0.004
*Intervention status × habitat found by CORP*
Found and reported by CORPs
Non-larviciding	0.9 (7/782)	1.00^a	NA
Larviciding area	0.3 (3/1181)	0.22 [0.147,0.34]	< 0.001
Not found or reported as dry habitats
Non-larviciding area	4.7 (37/782)	1.00^a	NA
Larviciding area	9.1(108/1181)	0.73 [0.383,1.37]	0.325

The Odds of change of late Anopheles habitat occupancy subject to CORPs detection sensitivity of wet habitats and subsequent larvicide application as interacting terms modelled with a binary distribution and logit link function using Generalized Estimating Equations (GEE)
^a reference group for a particular variable,
CI; confidence interval,
NA; Not applicable
n/N; the proportion of all habitats found to contain late stage Anopheles larvae by observations of the CORPs and the investigator.
OR; Odds ratios.

ISSN: 1475-2875