Table 4 Cox PH model summary of pesticide mixture effect on survival of fingerlings
From: Survival analysis of African catfish and Nile tilapia briefly exposed to complex pesticide mixtures
Fish species | Compared pesticides | df | Parameter estimate | SE | Chi-square | Pr > ChiSq | Hazard ratio |
|---|---|---|---|---|---|---|---|
African catfish | Atrazine vs. Atrazine-Mancozeb | 1 | 2.059 | .411 | 25.142 | .000 | 7.834 |
Mancozeb vs. Mancozeb-Chlorpyrifos | 1 | 1.148 | .325 | 12.472 | .000 | 3.152 | |
Chlorpyrifos vs. Chlorpyrifos-Lambda cyhalothrin Mixture | 1 | .225 | .251 | .809 | .368 | 1.253 | |
Atrazine vs. Atrazine-Lambda-cyhalothrin | 1 | .828 | .274 | 9.109 | .003 | 2.289 | |
Mancozeb vs. Mancozeb-Lambda cyhalothrin | 1 | .919 | .296 | 9.646 | .002 | 2.507 | |
Atrazine vs. Atrazine-Chlorpyrifos | 1 | .634 | .258 | 6.009 | .014 | 1.884 | |
Atrazine vs. Quaternary mixture | 1 | .463 | .247 | 3.516 | .061 | 1.588 | |
Tilapia | Atrazine vs. Atrazine-Mancozeb | 1 | .146 | .318 | .210 | .647 | 1.157 |
Mancozeb vs. Mancozeb-Chlorpyrifos | 1 | .085 | .320 | .070 | .792 | 1.088 | |
Chlorpyrifos vs. Chlorpyrifos-Lambda cyhalothrin Mixture | 1 | 1.895 | .275 | 47.421 | .000 | 6.653 | |
Atrazine vs. Atrazine-Lambda-cyhalothrin | 1 | − .290 | .285 | 1.031 | .310 | .748 | |
Mancozeb vs. Mancozeb-Lambda cyhalothrin | 1 | − .161 | .303 | .284 | .594 | .851 | |
Atrazine vs. Atrazine-Chlorpyrifos | 1 | − .473 | .277 | 2.918 | .088 | .623 | |
Atrazine vs. Quaternary mixture | 1 | .274 | .329 | .696 | .404 | 1.315 |