Table 4.

Results of a two-step cluster analysis of containers, statistics (percentage and mean ± SE) of some of the variables used in the classification, and pupae of Aedes aegypti, Dhaka, during the 2011 monsoon season

Derived clusters	Percentage of containers per cluster	Percentage of containers under the full shade (both indoor and outdoor)	Percentage of containers with rain water in them	Percentage of containers with vegetation nearby	Ae. aegypti pupae per container (mean ± SE)	Total count of pupae per cluster (% of pupae)
I	41.7	90.8	0.0	18.3	(0.94 ± 0.20)*	192 (34.9)
II	58.3	9.2	100.0	81.7	(1.25 ± 0.19)†	358 (65.1)

SE = standard error.

^*Container sample size in cluster I was 206.

^†Container sample size in cluster II was 287.