Table 1.

Effects of IC, litter size and age period on the number of live kittens and average juvenile body weight in domestic cat.

Predictors	Statistics
Number of surviving kittens
Intercept	B = 0.24 ± 0.38, z = 0.61, p = 0.54
Age	B = 0.05 ± 0.3, z = 0.16, p = 0.87
IC	B = −1.21 ± 0.73, z = 1.61, p = 0.11
Litter size	B = 0.77 ± 0.09, z = 8.12, p < 0.0001
Age/Litter size	B = −0.16 ± 0.07, z = 2.19, p = 0.03
Body mass of alive kittens at birth
Intercept	B = 0.12 ± 0.01, z = 22.16, p < 0.0001
Litter size	B = −0.004 ± 0.002, z = 1.83, p = 0.07
Number of live kittens	B = 0.003 ± 0.002, z = 1.12, p = 0.26
Body mass of alive kittens at the 60th day of age
Intercept	B = 0.88 ± 0.05, z = 16.56, p < 0.0001
Litter size	B = −0.02 ± 0.01, z = 1.71, p = 0.09
Number of live kittens	B = −0.03 ± 0.02, z = 2.05, p = 0.04

B and SE to model-averaged parameter estimates and standard errors in linear mixed-effect models. Litter identity was fitted as a random term in all LMMs. All effects were significant (p < 0.05).