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

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

TermReference categoryEstimateSE95% CIChisq*P
Intercept −0.0900.105−0.298, 0.135
Test predictors
 Categorical mother’s rank (Subordinate)Alpha−0.2920.103−0.491, − 0.0907.6320.006
 Continuous mother’s rank −0.0540.031−0.117, 0.0112.8280.093
Control predictors
 Age a 0.1470.0360.068, 0.220
 Sex (Male)Female−0.1800.059− 0.298, − 0.059
 Age a: sex (Male)Female−0.0610.050−0.162, 0.0381.4070.236
 SGb 0.7970.0570.683, 0.91769.257< 0.001
  Mother’s agec 0.0610.035−0.012, 0.1322.6710.102
  East groupNorth group0.1510.0780.007, 0.3083.6980.157
  South group0.0800.069−0.056, 0.220
 Sine Julian date −0.0340.055−0.142, 0.08410.2740.005
 Cosine Julian date 0.1440.0460.045, 0.237
  1. Statistically significant results (P ≤ 0.05) appear in bold and coded level of factors in parenthesis
  2. az-transformed, mean ± SD of the original variables: a6.62 ± 1.82 years, b1.02 ± 0.01, c30.52 ± 8.30 years
  3. *df = 1 except for Group, where df = 2