. 2016 Dec 27;114(2):268–273. doi: 10.1073/pnas.1616812114

Table S4.

Reduced event model: Effect of intergroup encounters and in-group affiliation on urinary oxytocin levels, log-transformed

Term	Estimate	SE	CI_lower	CI_upper	χ²^*	P
Intercept	4.484	0.224	4.037	4.986	–	–
Test predictor levels
Control with affiliation^†	0.097	0.163	−0.241	0.414	0.340	0.560
Control with coordination^†	0.689	0.249	0.198	1.200	4.902	0.027
Intergroup encounter without affiliation^†	1.136	0.199	0.723	1.559	28.920	<0.001
Intergroup encounter with affiliation^†	1.452	0.226	0.949	1.923	23.401	<0.001
Control predictors
Group^‡	−0.349	0.131	−0.624	−0.075	6.521	0.011
Sex^§	−0.438	0.214	−0.905	−0.015	3.943	0.047
Proximity^¶	−0.054	0.058	−0.173	0.064	0.858	0.354
Subgroup size^#	0.116	0.058	0.001	0.224	3.715	0.054
Rank^\|\|	0.174	0.109	−0.054	0.391	2.351	0.125

Statistically significant results (P ≤ 0.05) appear in bold.

Degrees of freedom are 1.

^†

^,‡,§χ² and P values refer to comparison with the reference categories ^†control without affiliation, ^‡East group, and ^§female.

^{^¶}

^,#,||z-transformed, mean ± SD of the original variables: ^¶56.46 ± 28.43 (range 5 to 99), ^#11.21 ± 5.95, and ^||0.618 ± 0.24 (range 0 to 1, with 1 being the highest social rank).