Table 2. Viral etiology of acute gastroenteritis in a day-care center, Rio de Janeiro, Brazil, 1994–2008.
| Variables | RotavirusPositive/examined(%) | NorovirusPositive/examined(%) | AstrovirusPositive/examined(%) | Any viral etiologyPositive/examined(%) |
| Age group | ||||
| 4–24 months | 77/384 (20.1)a | 114/307 (37.1)b | 16/193 (8.3) | 207/384 (53.9) |
| 25–60 months | 7/119 (5.9)a | 23/112 (20.5)b | 3/89 (3.4) | 33/119 (26.9) |
| Adults | 1/30 (3.3) | 12/29 (41.4) | 0/17 (0) | 13/30 (43.3) |
| Unknow | 2/6 | 2/4 | 0/2 | 4/6 |
| Season | ||||
| Summer | 0/24 (0) | 11/24 (45.8) | 0/13(0) | 11/24 (45.8) |
| Autumn | 40/239 (16.7) | 62/199 (31.2) | 11/137 (8) | 113/239 (47.2) |
| Winter | 31/220 (14.1) | 66/189 (34.9) | 6/123 (4.9) | 103/220 (46.8) |
| Spring | 16/56 (28.6) | 12/40 (30) | 2/28 (7.1) | 30/56 (53.6) |
| Temporal distribution | ||||
| 1994–2004 | 87/475 (18.3) | 115/388 (29.6) | 19/273 (7) | 221/475 (46.5) |
| 2005–2008 | 0/64 (0) | 36/64 (56.3) | 0/28 (0) | 36/64 (56.2) |
| Origen of Samples | ||||
| Outbreaks | 70/392 (17.9) | 107/322 (33.2) | 12/215 (5.6) | 189/392 (48.1) |
| Sporadic | 17/147 (11.6) | 44/130 (28.8) | 7/86 (8.1) | 68/147 (46.3) |
| Total | 87/539 (16.1) | 151/452 (33.4) | 19/301 (6.3) | 257/539 (47.7) |
a
Odds ratio (OR) = 4.01; 95% confidence interval (CI) = 1.72–9.81; p<0.001.
b
OR = 2.29; 95% CI = 1.33–3.95; p = 0.001.