Table 6.

Risk factors for Dengue virus exposure

	Model 1: risk factors		Model 2: risk factors and spatial information		Model 3: risk factors, spatial information, and potential sources
Variable	OR	95% CI	OR	95% CI	OR	95% CI
Gender
Female	REF		REF		REF
Male	0.66*	[0.43; 1.02]	0.65*	[0.42; 1.00]	0.61+	[0.40; 0.94]
Age category (year)
1–19	REF		REF		REF
20–30	0.46++	[0.25; 0.85]	0.44++	[0.24; 0.81]	0.42++	[0.23; 0.77]
31–45	0.48+	[0.26; 0.88]	0.42++	[0.23; 0.78]	0.45++	[0.24; 0.82]
46	0.65	[0.34; 1.27]	0.57	[0.29; 1.11]	0.59	[0.31; 1.14]
Migration status
Native	REF		REF		REF
15 years or less	1.21	[0.71; 2.07]	1.30	[0.76; 2.22]	1.40	[0.83; 2.36]
More than 15 years	1.72	[0.89; 3.32]	1.70	[0.88; 3.27]	1.52	[0.81; 2.86]
Income category†
I (lowest)	REF		REF		REF
II	1.19	[0.59; 2.40]	1.19	[0.60; 2.35]	1.25	[0.65; 2.42]
III	1.71	[0.86; 3.40]	1.54	[0.81; 2.29]	1.49	[0.78; 2.84]
IV	1.85*	[0.91; 3.75]	1.63	[0.81; 3.29]	1.58	[0.80; 3.10]
KAPi category
I (lowest)	REF		REF		REF
II	1.57	[0.78; 3.14]	1.61	[0.81; 3.18]	1.55	[0.80; 3.00]
III	2.71++	[1.32; 5.54]	2.68	[1.33; 5.40]	2.43++	[1.25; 4.74]
IV	2.44++	[1.20; 4.98]	2.37	[1.18; 4.76]	2.09+	[1.07; 4.05]
Northing (km)	–	–	0.88	[0.72; 1.08]	0.68++	[0.52; 0.89]
Easting (km)	–	–	0.72	[0.58; 0.90]	0.5+++	[0.35; 0.70]
Distance to flooding (m)	–	–	–	–	0.99903+++	[0.99854; 0.99952]
Distance to river shore (m)	–	–	–	–	1.00090+	[1.00019; 1.00160]
Cut 1: primary infection	3.99	[1.31; 6.66]	−0.53	[−1.52; 0.46]	−1.17	[−2.20; −0.13]
Cut 2: secondary infection	5.97	[3.21; 8.72]	1.40	[0.39; 2.42]	0.76	[−0.26; 1.78]

KAPi = indices for knowledge, attitudes, and practices; OR = odds ratio. The proportional odds/parallel lines assumption was tested with a Wald test. The models do not violate these assumptions (P = 0.750, 0.744, and 0.508, respectively).

P-values: +++ P < 0.001; ++ P < 0.01; + P < 0.05; and *P < 0.10.

^†The variable was transformed with the natural logarithm.