Table 5.

Incidence rate ratios (IRR) and 95% confidence intervals (CI) of measured and reported fever among persons receiving MenAfriVac^® delivered with and without a controlled temperature chain (CTC), stratified by duration of vaccine exposure to ambient temperature, Benin, 2012

	Axillary température ≥ 38°C		Reported fever
Exposure duration (hours)	n/N	IRR (95% CI)*	n/N	IRR (95% CI)*
< 1 (control group)	27/999	Ref.	103/998	Ref.
1-12	10/655	0·51 (0·25 to 1·05)	17/654	0·23 (0·14 to 0·38)
13-36	1/77	0·32 (0·04 to 2·35)	3/77	0·25 (0·08 to 0·79)
37-60	6/212	1·08 (0·44 to 2·61)	5/211	0·23 (0·10 to 0·58)
>60	1/38	0·80 (0·11 to 5·91)	0/38	0

^*IRR and confidence interval are calculated using Poisson regression model adjusted for person-days