Volume 9, Number 12—December 2003
Research
Risk Factors for Norovirus, Sapporo-like Virus, and Group A Rotavirus Gastroenteritis
Matty AS de Wit*1, Marion PG Koopmans*, and Yvonne THP van Duynhoven*
Table 4
Risk factors for rotavirus gastroenteritis, prevalence in cases and controls (54 pairs), univariate and multivariate odds ratios using logistic regression and PARa
| Rotavirus gastroenteritis | Cases | Controls | OR uni | 95% CI | OR multi | 95% CI | PAR (%) | |||
|---|---|---|---|---|---|---|---|---|---|---|
| N (%) |
N (%) |
|||||||||
| Household member with gastroenteritis |
n.i. |
|||||||||
| No |
30 (63.4) |
44 (91.7) |
np |
|||||||
| Yes, 1 |
10 (21.3) |
4 (8.3) |
||||||||
| Yes, >1 |
7 (14.9) |
0 (0.0) |
||||||||
| Contact with persons with gastroenteritis outside household |
86 |
|||||||||
| No |
13 (24.1) |
33 (61.1) |
1.0 |
- |
1.0 |
- |
||||
| Yes |
10 (18.5) |
6 (11.1) |
6.4 |
1.5 to 27.5 |
12.9 |
1.2 to 133.6 |
||||
| Do not know |
31 (57.4) |
15 (27.8) |
8.2 |
2.3 to 29.0 |
14.8 |
1.8 to 120.6 |
||||
| Educational level |
n.i. |
|||||||||
| Low |
2 (3.7) |
6 (11.1) |
0.3 |
0.0 to 2.9 |
||||||
| Middle |
15 (27.8) |
23 (42.6) |
1.0 |
- |
||||||
| High |
37 (68.5) |
25 (46.3) |
2.1 |
0.9 to 4.6 |
||||||
| Food-handling hygiene scoreb |
1.2 |
1.0 to 1.6 |
1.5 |
1.1 to 2.1 |
46 |
|||||
| Blender in household | 16 (29.6) | 30 (55.6) | 0.2 | 0.1 to 0.7 | 0.1 | 0.0 to 0.6 | ||||
aOR, odds ratio; PAR, population-attributable risk fraction; uni, univariate; multi, multivariate; CI=confidence interval; np, not possible to calculate; n.i.: not in final model.
bHigher score indicates less hygienic practices, OR for increase of 1.
1Current address of first author: Municipal Health Service, Department of Epidemiology, Documentation and Health Promotion, Nieuwe Achtergracht 100, 1018 WT Amsterdam, the Netherlands; email: mdwit@gggd.amsterdam.nl
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