Table 2

Incidence of acute gastroenteritis (per 100 children per year) in paediatric offices based on observation between December 1997 and May 1998

Centre^2-150	Number of cases	Children months under observation	Crude yearly incidence	Adjusted yearly incidence	95% confidence interval^2-151
Acute gastroenteritis (including all cases)
Leoben	67	25 494	3.15	3.00	2.36 to 3.82
Innsbruck	104	16 320	7.65	7.29	6.01 to 8.83
Acute gastroenteritis cases tested positive for rotavirus
Leoben	29	25 494	1.36	1.31	0.91 to 1.87
Innsbruck	20	16 320	1.47	1.36	0.88 to 2.11

↵2-150 Each centre includes two paediatric offices with different numbers of children enrolled: Leoben: n = 1170, n = 3079; Innsbruck: n = 1231, n = 1489.
↵2-151 Incidences are adjusted for month under observation and expressed as yearly incidence.