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. 2016 Sep 1;4:e2237. doi: 10.7717/peerj.2237

Table 4. Best fitted models obtained when the diquat × CAR interaction is removed at P > 0.10 after a backward stepwise procedure (see Methods).

Heart MDA and fat tocopherol did not maintain any term (all P > 0.10).

Dependent variable Terms in the model Slope SE F df P
Eye rings redness Carotenoid 25.55 3,154 <0.001
Total brightness −0.00004 0.00002 7.71 1,155 0.006
Eye ring redness in day 48 0.286 0.064 19.99 1,155 <0.001
Eye ring tocopherol 0.023 0.012 6.72 1,154 0.011
Eggs during diquat experiment −0.002 0.001 6.21 1,155 0.014
Bill redness Carotenoid 16.22 385.7 <0.001
Diquat 4.46 177.9 0.038
Total brightness −0.0001 0.00003 22.32 1,150 <0.001
Bill redness in day 48 0.163 0.054 9.1 1,141 0.003
Bill tocopherol 0.045 0.013 11.6 1,132 <0.001
Liver vitamin A 0.0008 0.0004 4.26 1,141 0.041
Leg redness Carotenoid 10.86 377.2 <0.001
Sex 2.86 180.3 0.095
Red chip 1.035 0.217 22.83 127.4 <0.001
Leg redness in day 48 0.58 0.064 81.19 1,147 <0.001
Leg tocopherol 3.022 0.589 26.36 1,146 <0.001
Liver tocopherol −1.78 0.523 11.59 1,147 <0.001
Total papilioerythrinone in the eye rings Carotenoid 25.34 3,153 <0.001
Sex 15.53 1,156 <0.001
Tocopherol in the eye ring 0.953 0.14 46.43 1,158 <0.001
Eggs (total) −0.009 0.004 5.43 1,153 0.021
Total papilioerythrinone in the bill Carotenoid 131.19 368.3 <0.001
Sex 2.9 176.3 0.092
Tocopherol in the bill 1.564 0.129 147.34 1,142 <0.001
Plasma retinol −9.038 4.666 3.75 1,145 0.055
Eggs (total) −0.009 0.003 8.37 177.9 0.005
Total astaxanthin in the legs Carotenoid 9.4 377.9 <0.001
Sex 10.56 187 0.002
Tocopherol in the legs 0.564 0.081 48.28 1,159 <0.001
Total papilioerythrinone in the legs Carotenoid 5.24 384.2 0.002
Sex 7.39 186.3 0.008
Tocopherol in the legs 0.866 0.139 38.79 1,152 <0.001
Tocopherol in the legs Carotenoid 3.97 385.7 0.011
Sex 5.74 189.2 0.019
Eggs (total) −0.004 0.002 4.93 185.4 0.029
Plasma zeaxanthin Carotenoid 322.78 3,150 <0.001
Zeaxanthin in day 48 0.31 0.07 19.6 3,150 <0.001
Plasma tocopherol 0.561 0.038 217.91 3,150 <0.001
Fat tocopherol −0.038 0.013 8.72 3,150 0.004
Liver vitamin A 0.002 0.001 5.35 3,150 0.022
Eggs during diquat experiment −0.004 0.002 4.06 3,150 0.046
Plasma tocopherol Carotenoid 5.78 398.2 0.001
Diquat 4.26 186.9 0.042
Tocopherol in day 48 0.19 0.066 8.32 1,144 0.005
Liver vitamin A −0.003 0.001 2.89 1,147 0.091
Fat retinol 0.034 0.016 4.81 1,147 0.029
Plasma retinol Plasma tocopherol 5.608 2.058 7.43 1,153 0.007
Eggs during diquat experiment −0.278 0.112 6.18 178 0.015
Liver lutein Carotenoid 130.26 3,161 <0.001
Plasma tocopherol 0.071 0.035 3.98 1,161 0.048
Liver tocopherol 0.263 0.028 87 1,161 <0.001
Liver vitamin A Carotenoid 59.87 3,157 <0.001
Sex 23.03 1,159 <0.001
Plasma tocopherol −11.396 3.947 8.34 1,157 0.004
Liver tocopherol 9.738 3.418 8.12 158 0.006
Total number of eggs −0.396 0.069 32.78 1,157 <0.001
Fat lutein Carotenoid 13.3 3,156 <0.001
Fat tocopherol 1.29 0.175 54.41 1,153 <0.001
Liver vitamin A 0.02 0.01 4.42 1,157 0.037
Plasma retinol −0.036 0.016 5.34 1,156 0.022
Fat retinol 0.271 0.084 10.44 1,157 0.002
Fat zeaxanthin Carotenoid 46.81 3,163 <0.001
Fat tocopherol 0.952 0.143 44.45 1,146 <0.001
Liver vitamin A 0.018 0.008 5.32 1,162 0.022
Fat retinol 0.208 0.069 9.03 1,163 0.003
Fat retinol Carotenoid 35.37 3,167 <0.001
Total number of eggs −0.026 0.01 8.62 1,165 0.004
Plasma TRG-corrected MDA Diquat 7.04 1,145 0.009
sex 5.13 1,147 0.025
Diquat × sex 4.66 1,145 0.033
TRG-corrected MDA in day 48 2.366 0.739 10.26 1,144 0.002
Triglycerides 0.004 0.001 38.25 1,146 <0.001
Eggs during diquat experiment 0.136 0.043 10.17 1,146 0.002
Resistance to oxidative stress in erythrocytes Diquat 5.64 167.4 0.02
Lag time −0.242 0.034 49.91 1,128 <0.001