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Table 5 Cox PH model summary of all predictors on survival of fingerlings

From: Survival analysis of African catfish and Nile tilapia briefly exposed to complex pesticide mixtures

Pesticide Parameter estimate SE Chi-square df Pr > ChiSq Hazard ratio 95.0% CI for the hazard ratio
Lower Upper
Atrazine-Mancozeb Species .245 .978 .063 1 .802 1.278a* .188 8.685
15 min  − .483 .572 .713 1 .398 .617 .201 1.894
30 min  − 1.102 .613 3.228 1 .072 .332 .100 1.105
45 min .156 .522 .089 1 .766 1.168 .420 3.250
60 min    4.509 3 .212    
Weight  − 5.220 2.737 3.636 1 .057 .005 .000 1.157
Length 1.132 1.011 1.254 1 .263 3.103 .427 22.521
Condition factor 1.670 .708 5.560 1 .018 5.312 1.326 21.284
Atrazine-Chlorpyrifos Species .129 .574 .051 1 .822 1.138a+ .369 3.504
15 min  − 1.165 .410 8.083 1 .004 .312 .140 .696
30 min  − .696 .385 3.267 1 .071 .499 .234 1.061
45 min  − .530 .365 2.101 1 .147 .589 .288 1.205
60 min    8.531 3 .036    
Weight  − 4.661 1.844 6.387 1 .011 .009 .000 .351
Length 1.063 .658 2.611 1 .106 2.895 .797 10.507
Condition factor 1.007 .329 9.375 1 .002 2.737 1.437 5.213
Atrazine-Lambda cyhalothrin Species .554 .610 .825 1 .364 1.740a+ .526 5.751
15 min  − 2.117 .504 17.650 1 .000 .120 .045 .323
30 min  − 1.290 .403 10.265 1 .001 .275 .125 .606
45 min  − .967 .365 7.039 1 .008 .380 .186 .777
60 min    23.436 3 .000    
Weight  − 6.316 3.407 3.436 1 .064 .002 .000 1.436
Length  − .210 .770 .074 1 .785 .811 .179 3.668
Condition factor  − .021 .413 .003 1 .960 .979 .436 2.200
Mancozeb-Chlorpyrifos Species  − .566 .540 1.098 1 .295 .568b+ .197 1.637
15 min  − 1.163 .552 4.430 1 .035 .313 .106 .923
30 min  − .938 .493 3.625 1 .057 .391 .149 1.028
45 min  − .099 .460 .047 1 .829 .906 .368 2.229
60 min    6.799 3 .079    
Weight  − 1.823 4.821 .143 1 .705 .162 .000 2050.017
Length  − 1.790 1.242 2.079 1 .149 .167 .015 1.903
Condition factor  − 1.165 .895 1.694 1 .193 .312 .054 1.802
Mancozeb-Lambda cyhalothrin Species .537 .701 .587 1 .444 1.711a+ .433 6.760
15 min  − 2.674 .573 21.746 1 .000 .069 .022 .212
30 min  − 1.342 .456 8.657 1 .003 .261 .107 .639
45 min  − 1.167 .451 6.682 1 .010 .311 .129 .754
60 min    23.575 3 .000    
Weight  − 2.991 1.331 5.048 1 .025 .050 .004 .683
Length .541 .651 .691 1 .406 1.718 .480 6.150
Condition factor 1.692 .649 6.785 1 .009 5.428 1.520 19.385
Chlorpyrifos-Lambda cyhalothrin Species 1.716 .488 12.379 1 .000 5.563a# 2.139 14.472
15 min  − 2.696 .475 32.190 1 .000 .067 .027 .171
30 min  − 1.308 .364 12.924 1 .000 .270 .132 .552
45 min  − .187 .337 .309 1 .579 .829 .428 1.606
60 min    38.745 3 .000    
Weight 3.244 .779 17.326 1 .000 25.627 5.564 118.033
Length  − 2.825 .591 22.856 1 .000 .059 .019 .189
Condition factor .302 .483 .392 1 .531 1.353 .525 3.485
Quaternary Species 2.779 .691 16.162 1 .000 16.099a# 4.154 62.396
15 min  − .990 .478 4.284 1 .038 .371 .145 .949
30 min  − 1.298 .462 7.884 1 .005 .273 .110 .676
45 min  − .378 .394 .921 1 .337 .685 .316 1.483
60 min    10.245 3 .017    
Weight  − 1.280 .946 1.831 1 .176 .278 .044 1.775
Length .719 .389 3.418 1 .064 2.053 .958 4.402
Condition factor 3.426 .619 30.678 1 .000 30.748 9.148 103.347
  1. aIndicates increase in hazard ratio, while bindicates a decrease in hazard ratio compared with when other predictors were held constant; *indicates significant when other predators were held constant but no longer significant; +indicates not significant when other predators were held constant and not significant now; #indicates not significant when other predators were held constant but now significant