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. Author manuscript; available in PMC: 2014 Mar 13.
Published in final edited form as: Horm Behav. 2010 May 28;58(3):440–449. doi: 10.1016/j.yhbeh.2010.05.009

Table 2.

Effect of categorical rank (high- and low-ranking), adult subgroup sex ratio (number of adult males/number of adult females), infant age (days), time of sample collection (AM vs PM), and an interaction term for rank by sex ratio on log-transformed faecal glucocorticoid metabolite (FGM) concentrations in female chimpanzees

Variable Estimate Numerator
df 		Denominator
df 		F P
Dependent variable: log FGM
Intercept 1.3089 1 10.627 503.927 <0.001
Rank (high vs low) 0.1239 a 1 6.922 2.479 0.160
Adult sex ratio 0.1025 1 38.775 0.037 0.848
Time of faecal collection (AM vs PM) 0.0224 b 1 95.999 0.121 0.728
Offspring age (days) −0.0293 1 17.856 1.740 0.204
Rank*adult sex ratio −0.2229 c 1 57.585 5.174 0.027

Statistically significant results appear in bold.

a

For high-rank;

b

For AM samples;

c

For high-rank*adult subgroup size.