Maternal effects on offspring growth indicate post-weaning juvenile dependence in chimpanzees (Pan troglodytes verus)

Table 2 ‘Maternal rank effects’ model results: The effect of mother’s dominance rank on creatinine levels (log-transformed)

Term	Reference category	Estimate	SE	95% CI	Chisq^*	P
Intercept		−0.090	0.105	−0.298, 0.135	–	–
Test predictors
Categorical mother’s rank (Subordinate)	Alpha	−0.292	0.103	−0.491, − 0.090	7.632	0.006
Continuous mother’s rank		−0.054	0.031	−0.117, 0.011	2.828	0.093
Control predictors
Age ^a		0.147	0.036	0.068, 0.220	–	–
Sex (Male)	Female	−0.180	0.059	− 0.298, − 0.059	–	–
Age ^a: sex (Male)	Female	−0.061	0.050	−0.162, 0.038	1.407	0.236
SG^b		0.797	0.057	0.683, 0.917	69.257	< 0.001
Mother’s age^c		0.061	0.035	−0.012, 0.132	2.671	0.102
East group	North group	0.151	0.078	0.007, 0.308	3.698	0.157
South group	North group	0.080	0.069	−0.056, 0.220	3.698	0.157
Sine Julian date		−0.034	0.055	−0.142, 0.084	10.274	0.005
Cosine Julian date		0.144	0.046	0.045, 0.237	10.274	0.005

Statistically significant results (P ≤ 0.05) appear in bold and coded level of factors in parenthesis
^az-transformed, mean ± SD of the original variables: ^a6.62 ± 1.82 years, ^b1.02 ± 0.01, ^c30.52 ± 8.30 years
^*df = 1 except for Group, where df = 2

ISSN: 1742-9994