Determinants of Aedes mosquito density as an indicator of arbovirus transmission risk in three sites affected by co-circulation of globally spreading arboviruses in Colombia, Ecuador and Argentina

Table 4 Mixed-effects regression IRR values, the two boundaries of the 95% CI (IRR 2.5% and 97.5% CI) and the P value, for each predictor included in the final model of household female Aedes mosquito density for the dataset from Ibagué, Colombia

Predictor^a	Level^a	IRR	IRR 2.5% CI	IRR 97.5% CI	P
Number of occupants		1.16	1.05	1.28	0.002*
Number of occupants who study		1.13	1.02	1.25	0.017*
Number of floors		1.23	1.11	1.34	< 0.001*
Number of family cores		0.78	0.70	0.87	< 0.001*
Distance to nearest household		0.89	0.80	0.98	0.019*
Arbovirus knowledge		0.87	0.81	0.94	< 0.001*
Wealth index	Lowest	Reference
	Middle	0.87	0.69	1.11	0.257
	Highest	0.65	0.51	0.84	0.001*
Insecticide use	No	Reference
Insecticide use	Yes	0.83	0.71	0.98	0.023*
Killing insects	No	Reference
Killing insects	Yes	0.82	0.62	1.06	0.129
Use of other means of protection against mosquitoes	No	Reference
Use of other means of protection against mosquitoes	Yes	0.68	0.53	0.85	0.001*
Presence of green areas around household	No	Reference
Presence of green areas around household	Yes	1.26	1.04	1.52	0.018*
Presence of water bodies near household	Yes	Reference
Presence of water bodies near household	No	1.47	1.08	1.97	0.011*
Presence of other/decorative vegetation	No	Reference
Presence of other/decorative vegetation	Yes	1.59	1.26	2.00	< 0.001*
Waste collection method	Inside property	Reference
	Outside property	9.63	2.03	176.58	0.026*
	Private or municipal collection	8.91	1.93	163.28	0.030*

Estimation of model coefficients was conducted on a total of 370 households (98% of the full dataset). Average proportion of variance explained by random-effects factors, i.e. month and neighborhood, was 0.23 and 0.84, respectively
^aPredictors that are underlined have an IRR that is significantly different from 1
*Significant at a threshold α = 0.05

ISSN: 1756-3305