Table 3.

Univariate and multi-variate logistic regression of risk factors associated with diphtheria in Sana'a, 2019.

	Univariate		Multi-variate
Variables	cOR	95% CI	aOR	95% CI
Sociodemographic factors
Paternal factors
Low education level	0.8	0.4–1.4	0.6	0.3–1.5
Not working	1.3	0.6–2.8	1.1	0.5–2.5
Maternal factors
Low education level	0.9	0.4–1.9	0.9	0.4–2.5
Not working	1.0	0.4–2.5	0.9	0.3–2.7
Household factors:
Type of house (apartment)	1.1	0.6–1.9	0.9	0.4–1.8
Family size of at least seven people (median)	0.7	0.4–1.3	0.6	0.3–1.2
Three or more rooms in house (mean)	0.9	0.5–1.6	0.8	0.4–1.7
Shared a bedroom with at least two people (mean)	2.1	1.0–4.2a	2.8	1.2–6.6a
Shared utensils and cups	1.2	0.4–3.2	1.1	0.3–3.3
Shared towels	1.3	0.7–2.5	0.9	0.4–1.9
Immunization status
Non-vaccinated	2.3	1.2–4.6a	2.6	1.2–6.0a
Source of infection
Travel history to area with diphtheria	1.2	0.4–3.2	0.5	0.2–1.7
Contact with diphtheria case	9.1	2.6–31.5a	10.6	2.6–43.6a

aOR, adjusted odds ratio; CI, confidence interval; cOR, crude odds ratio.

^aP<0.05.