Volume 7, Number 1—February 2001
Research
Gastroenteritis in Sentinel General Practices, the Netherlands
Matty A.S. de Wit*
, Marion P.G. Koopmans*, Laetitia M. Kortbeek*, Nan J. van Leeuwen*, AAD I.M. Bartelds†, and Yvonne T.H.P. van Duynhoven*
, Marion P.G. Koopmans*, Laetitia M. Kortbeek*, Nan J. van Leeuwen*, AAD I.M. Bartelds†, and Yvonne T.H.P. van Duynhoven*Table 2
Multivariate logistic regression analyses of the selection of participating cases from all cases that were reported or participated in the case-control study, the Netherlands
| Recruited or | % Recruited | %Part. | % Total | ORb for | ||
|---|---|---|---|---|---|---|
| reported | by GP | casesa | response | response | 95% CIc | |
| Gender | nid | |||||
| Male | 1,178 | 45 | 79 | 35 | ||
| Female | 1,370 | 44 | 78 | 35 | ||
| 0 | 123 | 34 | 76 | 26 | 0.84 | 0.51-1.37 |
| 1-4 | 452 | 40 | 76 | 31 | 0.89 | 0.63-1.25 |
| 5-14 | 342 | 36 | 82 | 30 | 0.85 | 0.59-1.21 |
| 15-24 | 265 | 51 | 65 | 33 | 1.00 | - |
| 25-39 | 621 | 51 | 76 | 39 | 1.30 | 0.95-1.78 |
| 40-64 | 487 | 50 | 85 | 42 | 1.50 | 1.08-2.07 |
| 65+ | 254 | 35 | 92 | 32 | 0.89 | 0.61-1.30 |
| Urbanization | ni | |||||
| Low | 305 | 34 | 94 | 32 | ||
| Intermediate | 1,654 | 46 | 79 | 37 | ||
| High | 582 | 45 | 72 | 32 | ||
| Region | ||||||
| North | 281 | 60 | 83 | 49 | 2.16 | 1.63-2.87 |
| East | 586 | 33 | 84 | 28 | 0.86 | 0.68-1.08 |
| West | 1,034 | 41 | 73 | 30 | 1.00 | - |
| South | 642 | 53 | 81 | 43 | 1.69 | 1.36-2.08 |
| Year of study | ||||||
| May 96- Apr 97 | 804 | 59 | 80 | 47 | 1.00 | |
| May 97- Apr 98 | 841 | 40 | 81 | 32 | 0.50 | 0.43-0.65 |
| May 98- Apr 99 | 889 | 34 | 77 | 26 | 0.40 | 0.33-0.50 |
| Total | 2,553 | 45 | 78 | 35 | - | - |
apart = participating.
bOR = odds ratio for participation (defined as a case questionnaire received at the National Institute of Public Health and the Environment).
cCI = confidence interval.
dni = not included in the logistic regression model.
