Table 4.

Multivariable analysis (fully adjusted and reduced) for risk factors associated with ARI.

		Fully adjusted (model A)		Reduced (model B)
Variables	Categories	amOR†	P>|z|	amOR†	P > |z|
Gender	Male	Ref	Ref	Ref	Ref
	Female	0.79 (0.68–0.91)	0.002	0.78 (0.67–0.91)	0.002
Mother age	≤20 year	Ref	Ref
	20–30	0.82 (0.61–1.10)	0.180
	>30	0.821 (0.60–1.12)	0.218
Mother's education	No education	Ref	Ref
	Primary	1.200 (0.96–1.50)	0.112
	Secondary	1.123 (0.90–1.41)	0.312
	Higher	1.015 (0.76–1.35)	0.917
Father's education	No education	Ref
	Primary	0.922 (0.73–1.17)
	Secondary	1.009 (0.82–1.24)
	Higher	0.869 (0.68–1.11)
Exclusively breastfed (0–6 months)	No	Ref	Ref	Ref	Ref
	Yes	0.821 (0.69–0.98)	0.026	0.81 (0.69–0.97)	0.019
Wealth index (quintiles)	Poorest	Ref	Ref
	Poor	0.964 (0.76–1.22)	0.761
	Middle	0.983 (0.77–1.26)	0.894
	Rich	0.900 (0.69–1.17)	0.438
	Richest	0.911 (0.68–1.22)	0.527
Improved source of sanitation	No	Ref	Ref
	Yes	1.158 (0.96–1.40)	0.132
Comorbid with diarrhea	No	Ref	Ref	Ref	Ref
	Yes	1.579 (1.35–1.85)	<0.001	1.64 (1.40–1.91)	<0.001

A—Model includes all predictors significant at p < 0.2 in bivariate analysis.

B—Parsimonious model selected using backward elimination, p < 0.05 considered significant.

^†Adjusted matched odds ratio.