Table 4.
Comparison of the proportions of positive RAMS for each challenge strain per number of total RAMS collected using logistic regression
| Baseline and comparison strain | Value of logistic regression statistic for proportion of positive RAMSa |
||||
|---|---|---|---|---|---|
| β | SE (β) | z value | P value | OR (95% CI) | |
| Relative to FRIK 47 | |||||
| Intercept | 0.0890 | 0.1492 | 0.5960 | 0.5511 | 1.0930 (0.8159–1.4660) |
| FRIK 1641 | −1.8678 | 0.3349 | −5.5770 | 2.45 × 10−8 | 0.1545 (0.0771–0.2893) |
| FRIK 1641 Δstx2 | −0.6837 | 0.2660 | −2.5700 | 0.0102 | 0.5048 (0.2974–0.8457) |
| FRIK 2533 | −3.8731 | 0.7305 | −5.3020 | 1.15 × 10−7 | 0.0208 (0.0033–0.0686) |
| Relative to FRIK 1641 | |||||
| Intercept | −1.7789 | 0.2999 | −5.9320 | 2.98 × 10−9 | 0.1688 (0.0896–0.2930) |
| FRIK 1641 Δstx2 | 1.1841 | 0.3720 | 3.1830 | 0.0015 | 3.2679 (1.6069–6.9703) |
a
SE, standard error; OR, odds ratio; CI, confidence interval.