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Table 1 ‘Effects of maternal presence’ model results: effects of maternal presence 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 −0.2810.071−0.430, − 0.144
Test predictors
 Age a 0.1340.0440.037, 0.227
 Sex (Male)Female0.1000.0470.001, 0.191
 Age a: Sex (Male)Female0.1620.0470.092, 0.27210.5100.001
 orphan (Yes)No−0.1220.046− 0.220, − 0.0276.3760.012
Control predictors
 SGb 0.6900.0240.641, 0.740131.566< 0.001
  North groupEast group−0.1040.081−0.263, 0.0604.1290.127
  South group0.0470.073−0.110, 0.195
 Sine Julian date 0.0530.030−0.006, 0.11727.019< 0.001
 Cosine Julian date 0.1860.0310.120, 0.250
  1. Statistically significant effects (P ≤ 0.05) appear in bold and coded level of factors in parenthesis
  2. a-bz-transformed, mean ± SD of the original variable: a 9.61 ± 3.26 years, b1.02 ± 0.01
  3. *df = 1 except for Group, where df = 2