Table 3. Multivariate model with living with extended family × education interaction term.

Factors	Adjusted HR (95% CI)	Chi-squared p-value
Age (years)
≤25	3.44 (2.04, 5.81)	<0.001
26–35	1.70 (1.12, 2.59)	0.013
>35	1.00
Five or more household members with EVD (excluding self)	0.56 (0.37, 0.84)	0.005
Diarrhea symptoms during EVD	0.49 (0.30, 0.80)	0.004
Education × living with extended family interaction term		0.001
Level 1: Not living with extended family—secondary or higher/8+ years of education (versus primary level or lower/<8 years of education)	2.62 (1.50, 4.58)
Level 2: Living with extended family—secondary or higher/8+ years of education (versus primary level or lower/<8 years of education)	0.77 (0.49, 1.20)

HR > 1 implies higher probability of being confirmed EBOV RNA negative in semen (lower likelihood of EBOV persistence); HR < 1 implies a lower probability of being confirmed EBOV RNA negative in semen (increased likelihood of EBOV persistence).

CI, confidence interval; EBOV, Ebola virus; EVD, Ebola virus disease; HR, hazard ratio.