Table 2.

Model coefficients associated with the number of times men were co-unokais together

Independent variable	IRR (semirobust SE)	Z	P
Dyad from same population block	1.28 (0.04)	8.7	<0.001
Absolute age difference	0.99 (0.002)	−4.2	<0.001
Dyad from same place of birth	0.86 (0.04)	−3.6	<0.001
Dyad from same patriline	0.93 (0.05)	−1.3	0.21
Coefficient of relatedness	1.22 (0.25)	0.9	0.35
Constant	0.56 (0.02)	−21.3	<0.001

IRR, incidence rate ratio. Data coding: 0 = no; 1 = yes.