Table 5.
Mantel-Haenszel and Stratified Analysis, and Risk Estimates for Specific Food and Water Exposures, by Consumption of Egg/Shrimp and Corned Beef Sandwiches for Lunch at the Canteen of the Company Affected by the Enterocytozoon bieneusi Outbreak, Denmark, 2020
| Did Not Eat Egg/Shrimp and Corned Beef Sandwich | Ate Egg/Shrimp and Corned Beef Sandwich | P-value | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Exposure | RRc | 95% CI | RRMH | 95% CI | RR0 | 95% CI | RR1 | 95% CI | |||||
| Baked pumpkin salad | 2.3 | 1.2 | 4.4 | 1.2 | .8 | 1.9 | 1.0 | .7 | 1.5 | 2.2 | .4 | 13.0 | .40 |
| Chocolate cake | 2.4 | 1.2 | 5.0 | 1.3 | 1.0 | 1.8 | 1.2 | .9 | 1.7 | 1.7 | .6 | 5.3 | .58 |
| Baked vegetables salad | 2.6 | 1.1 | 5.8 | 1.6 | .8 | 3.2 | 1.3 | .7 | 2.3 | Inf | … | … | … |
| Tap water (during the 2 weeks) | 2.7 | 1.2 | 6.5 | 1.2 | .9 | 1.6 | 1.0 | .8 | 1.4 | 2.2 | 1.1 | 4.4 | .04 |
Woolf test of homogeneity was used to assess statistically significant associations on effect modification.
Abbreviations: CI, confidence interval; RRc, relative risk (crude); RRMH, relative risk (Mantel-Haenszel adjusted); RR0, relative risk for stratum 0 (not exposed); RR1, relative risk for stratum 1 (exposed).