Table 1.

Incidence of all gastroenteritis, rotavirus gastroenteritis and severe rotavirus gastroenteritis in the study cohorts

	Cohort 1 (birth to 12 months) (n = 100)	Cohort 2 (12–24 months)(n = 100)	Birth to 24 months
Child-years of follow-up	92·3	94·5	186·8
Gastroenteritis episodes, n	139	71	210
Gastroenteritis episodes/child-year, rate (95% CI)	1·50 (1·48–1·53)	0·75 (0·57–0·93)	1·12 (0·97–1·28)
Rotavirus gastroenteritis episodes, n	17	13	30
Rotavirus gastroenteritis episodes/child-year, rate (95% CI)	0·18 (0·10–0·27)	0·14 (0·07–0·21)	0·16 (0·10–0·22)
Severe gastroenteritis (Vesikari score ⩾11) episodes, n	13	1	14
Severe gastroenteritis episodes/child-year; rate (95% CI)	0·14 (0·04–0·17)	0·01 (−0·01–0·03)	0·07 (0·02–0·09)
Severe rotavirus gastroenteritis (Vesikari score ⩾11) episodes, n	5	0	5
Severe rotavirus gastroenteritis episodes/child-year, rate (95% CI)	0·05 (0·01–0·10)	–	0·03 (0·00–0·05)

CI, Confidence interval.