Risk Factors Associated with Dengue Transmission and Spatial Distribution of High Seroprevalence in Schoolchildren from the Urban Area of Medellin, Colombia

Table 2

Univariate logistic regression for DENV IgG seroprevalence in the studied schoolchildren population in 2010–2012 from Medellin.

	2010 ()	Crude OR	95% CI	2011()	Crude OR	95% CI	2012 ()	Crude OR	95% CI
Gender	% (n)			% (n)			% (n)
Male	52.9 (459/867)	Ref.	—	57.2 (510/891)	Ref.	—	59.9 (200/334)	Ref.	—
Female	54.6 (503/921)	1.03	0.95–1.12	59.6 (594/997)	1.04	0.96–1.12	68.8 (258/375)	1.15	1.03–1.28
Self-reported ethnic group
Afro-descent	45.6 (41/90)	Ref.	—	63.1 (41/65)	Ref.	—	71.4 (10/14)	Ref.	—
Mestizo	54.2 (921/1,698)	1.19	0.95–1.50	58.8 (1,058/1,800)	0.93	0.77–1.13	64.5 (448/695)	0.90	0.64–1.26
Age group (years)
5 to 9	34.9 (199/571)	Ref.	—	45.4 (181/399)	Ref.	—	50 (94/188)	Ref.	—
10 to 14	61.6 (594/965)	2.99	2.41–3.71	60.2 (660/1,097)	1.90	1.51–2.40	70.5 (292/414)	2.40	1.68–3.41
15 to 19	67.1 (169/252)	3.80	2.78–5.21	67.1 (264/392)	2.60	1.95–3.47	64.6 (72/107)	2.06	1.25–3.40
Socioeconomic status
Low	58.2 (592/1,017)	Ref.	—	60.0 (682/1,137)	Ref.	—	61.2 (210/343)	Ref.	—
Middle	49.1 (318/648)	0.69	0.57–0.84	56.5 (368/651)	0.87	0.72–1.6	68.0 (247/363)	1.37	1.0–1.85
High	42.3 (52/123)	0.53	0.36–0.77	54.6 (53/97)	0.80	0.53–1.22	0 (0/0)	—	—
Study year
IgG positive	53.8 (962/1,788)	Ref.	—	58.8 (1,104/1,888)	1.21	1.06–1.38	64.6 (458/709)	1.57	1.30–1.87

Statistically significant: ; OR: odds ratio; CI: confidential interval.