Table 4.
Statistically significant odds ratios and associated 95% confidence intervals for exposures in cases associated with specific CGF40 subtypes vs. sporadic cases (cases with CGF40 subtype detected once) from case-case analysis
| Cases, n | Reported risk factor | Exact OR | ||||
|---|---|---|---|---|---|---|
| CGF40 subtype | Yes/ (yes+no) |
% | OR | 95% CI | Two-sided P value | |
| Urban residence | ||||||
| Sporadic | 89 | 71/85 | 83·5 | Ref. | – | – |
| 0926·002·001 | 6 | 2/6 | 33·3 | 0·102 | 0·008–0·792 | 0·0261 |
| 0129·001·002 | 6 | 2/6 | 33·3 | 0·102 | 0·008–0·792 | 0·0261 |
| Acquired in Nova Scotia | ||||||
| Sporadic | 89 | 35/75 | 46·7 | Ref. | – | – |
| 0083·001·002 | 17 | 12/13 | 92·3 | 13·401 | 1·815–600·55 | 0·0038 |
| 0253·004·001 | 12 | 8/9 | 88·9 | 8·949 | 1·108–415·595 | 0·0354 |
| 004·003·001 | 8 | 7/7 | 100·0 | 10·521* | 1·972-infinity | 0·0142 |
| 0173·002·004 | 6 | 6/6 | 100·0 | 8·947* | 1·631-infinity | 0·0277 |
| Works in chicken or mink farming or processing | ||||||
| Sporadic | 89 | 3/81 | 3·7 | Ref. | – | – |
| 0129·001·002 | 6 | 3/6 | 50·0 | 23·679 | 2·266–277·09 | 0·0067 |
| Contact with chickens | ||||||
| Sporadic | 89 | 6/80 | 7·5 | Ref. | – | – |
| 0882·005·001 | 6 | 3/6 | 50·0 | 11·609 | 1·282–107·827 | 0·0277 |
| 0129·001·002 | 6 | 4/6 | 66·7 | 22·641 | 2·665–298·775 | 0·0026 |
| Drank unpasteurized milk | ||||||
| Sporadic | 89 | 3/72 | 4·2 | Ref. | – | – |
| 0018·001·002 | 14 | 4/12 | 33·3 | 10·91 | 1·554–88·696 | 0·014 |
| Has a pet dog and/or cat | ||||||
| Sporadic | 89 | 40/81 | 49·4 | Ref. | – | – |
| 0083·001·002 | 17 | 13/14 | 92·9 | 13·056 | 1·803–579·77 | 0·0037 |
OR, Odds ratio; CI, confidence interval.
*
Median unbiased estimate.