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Table 2 Minimal adequate models of oxidative status markers

From: Plasmodium infection and oxidative status in breeding great tits, Parus major

  Estimate SE t value p value
Superoxides     
 Intercept 0.0163 0.1119 0.15 0.885
 Body mass 0.0143 0.0062 2.29 0.026
 Age 0.0434 0.0145 2.99 0.004
 Sex 0.0295 0.0121 2.44 0.019
 Hatching date     0.840
 Brood size 0.0084 0.0044 1.91 0.060
 Infection 0.0311 0.0126 2.47 0.017
 Infection: age     0.074
 Infection: sex     0.823
 Infection: brood size     0.757
ROMs
 Intercept 5.3231 1.0428 5.10 <0.001
 Body mass     0.147
 Age 0.9421 0.4480 2.10 0.041
 Sex 1.0925 0.3917 2.79 0.008
 Hatching date     0.345
 Brood size 0.2640 0.1584 1.67 0.099
 Infection 4.0244 1.5971 2.52 0.015
 Infection: age     0.122
 Infection: sex     0.629
 Infection: brood size 0.6147 0.2528 2.43 0.019
Membrane resistance
 Intercept 95.0378 4.4943 21.15 <0.001
 Body mass     0.787
 Age     0.919
 Sex 3.1481 0.8484 3.71 <0.001
 Hatching date 0.4560 0.0969 4.71 <0.001
 Brood size 1.2989 0.3879 3.35 0.001
 Infection     0.113
 Infection:age     0.558
 Infection: sex     0.290
 Infection: brood size     0.365
Antioxidant capacity
 NULL     
 Body mass     0.671
 Age     0.087
 Sex     0.173
 Hatching date     0.336
 Brood size     0.084
 Infection     0.816
 Infection: age     0.972
 Infection: sex     0.165
 Infection: brood size     0.897
  1. The markers are superoxide production (superoxide production corrected for mitochondria quantity; n total 141, n sub-adult/adult 47/94, n female/male 70/71, n uninfected/infected 80/61), reactive oxygen metabolites (ROMs square root transformed; n total 134, n sub-adult/adult 43/91, n female/male 65/69, n uninfected/infected 73/61), RBC membrane resistance to oxidative attack (n total 133, n sub-adult/adult 50/83, n female/male 67/66, n uninfected/infected 75/58) and plasma antioxidant capacity (log transformed; n total 69, n sub-adult/adult 16/53, n female/male 34/35, n uninfected/infected 43/26) and the models considered reproductive effort as brood size
  2. Minimal models are given in italic with intercept, as well as estimate, standard error (SE), t value and p value for each term. Non-significant terms that were tested, are given with the p value of the likelihood ratio test before being dropped out of the model