Table 2.

Odds of developing disease given characteristics of and residential proximity to source case. ‘ref’ indicates the reference group for the odds ratio calculations.

	unadjusted OR (95% CI)	p-value	adjusted OR (95% CI)	p-value
sex of source
male	ref	—	ref	—
female	0.80 (0.56, 1.15)	0.225	0.96 (0.64, 1.44)	0.841
age of source
<15 years	ref	—	ref	—
15–45 years	1.23 (0.63, 2.39)	0.539	1.31 (0.64, 2.67)	0.455
>45 years	0.95 (0.46, 1.95)	0.888	0.84 (0.38, 1.86)	0.667
residential proximity with source case
same household	ref	—	ref	—
same zone, different community	0.46 (0.32, 0.65)	<0.001**	0.27 (0.17, 0.42)	<0.001**
same community, different household	0.43 (0.26, 0.70)	0.001**	0.42 (0.22, 0.80)	0.008**
different zone	1.06 (0.60, 1.88)	0.833	0.74 (0.26, 2.11)	0.571
disease outcome of source case
survived	ref	—	ref	—
deceased	1.34 (0.96, 1.87)	0.089	1.14 (0.76, 1.72)	0.517

**p < 0.05.