Table 4.
Best-fit generalized linear mixed effects model (binomial) of variables and interactions that influenced ovary development
| Fixed effects | Groups | Estimate | SE | p value | Odds ratio (95% CI) |
|---|---|---|---|---|---|
| Intercept | 1.315 | 0.369 | < 0.0004 | 3.724 (3.000, 4.448) | |
| Treatment | Control (n = 196) | – | – | – | – |
| Fipronil (n = 185) | − 3.379 | 0.407 | < 0.0001 | 0.0314 (− 0.764, 0.832) | |
| Ivermectin (n = 91) | − 1.776 | 0.455 | 0.0001 | 0.169 (− 0.722, 1.061) | |
| Day after treatment | 0.060 | 0.033 | 0.07 | 1.062 (0.998, 1.126) |
Model: FullyGravid ~ Treatment + DayAfterTreat + (1|CowID), where the fixed effects were ‘Treatment’ (n = total number of mosquitoes dissected per treatment group) and ‘Day After Treatment’. The random effect was ‘CowID’ (i.e., the six individual heifers. Standard deviation = 0.250)