Table 4.

Container and water characteristics (categorical variables) in urban and rural sites in Anapoima municipality, Colombia, October-December 2011. Both mosquito-positive and negative containers are included. Differences between urban and rural sites were tested using Chi-square test

Variable	Value	Urban (%)	Rural (%)	Chi-square	P
		n = 36	n = 35
Container type	Wash basin (alberca)	52.8	60.0	0.38	0.540
	Ground tank	47.2	40.0
Location of container	Outdoors	52.8	73.5	3.22	0.073
	Indoors	47.2	26.5
Material of container	Plastic	33.3	20.6	6.31	0.043
	Cement	55.6	79.4
	Metal	11.1	0.0
Source of water	Village pipe	5.6	62.9	40.33	< 0.0001
	Municipal pipe	61.1	5.7
	Rain only	11.1	11.4
	Rain + village pipe	8.3	17.1
	Rain + municipal pipe	13.9	0.0
	Village pipe + river + spring	0.0	2.9
Use of water	Washing + cleaning	58.3	60.0	0.32	0.956
	Multiple uses, including drinking	11.1	11.4
	Multipe uses, excluding drinking	25.0	25.7
	Drinking only	5.6	2.9
Lid status	Effective lid	22.2	8.8	2.42	0.299
	None	58.3	70.6
	Ineffective lid	19.4	20.6
Frequency of container washing	Weekly	27.8	48.6	3.94	0.140
	Monthly	52.8	31.4
	Never	19.4	20.0
Location in shade	Yes	50.0	38.2	1.08	0.584
	No	16.7	23.5
	Partial	33.3	38.2
Location under roof	Yes	55.6	55.9	2.58	0.275
	No	13.9	26.5
	Partial	30.6	176
Algae in container	Present	19.4	22.9	0.12	0.725
Organic material in container	Present	66.7	42.9	4.06	0.044
Macroinvertebrates in container	Present	19.4	5.7	3.02	0.082