Table 5.

Linear mixed model for males’ friendships and plasma vasopressin concentrations.

Variable	B	Standard error
Birth cohort: 2002	117.61*	51.21
Birth cohort: 2003a	–	–
High Rank	−283.55b	147.46
Middle Ranka	–	–
Low Rank	−451.05**	139.74
Disturbance Time	0.30**	0.056
Draw Time	−0.72*	0.33
Total Friendships	55.29b	30.12
Multiplex Friendships	132.30*	49.51
Play Friendships	−91.21*	43.79
Proximity Friendships	−202.80**	46.71
High Rank × Proximity Friendships	123.52*	44.33
Middle Rank × Proximity Friendshipsa	–	–
Low Rank × Proximity Friendships	170.83**	49.25

^aReference category; ^b0.05 < p < 0.10; *p ≤ 0.05 **p < 0.01.