Table 1.

Offspring Survival Is Negatively Associated with Neighbor Pressure during Pregnancy

Terms	b	SE	p	95% CI
Food availabilitya,b	0.294	0.214	0.170	0.95, 1.87
Number of individualsa,b	−0.058	0.216	0.790	0.67, 1.33
Number of malesa,b	−0.049	0.240	0.840	0.61, 1.47
Neighbor pressurea,b	1.025	0.391	0.008c	1.51, 4.85c
Sex_infant_maled	−0.777	0.398	0.051	0.19, 1.13
Age of motherb,d	0.596	0.231	0.010c	1.15, 2.87c
Rank of motherb,d	−0.117	0.197	0.550	0.66, 1.19

Cox proportional hazards model on offspring survival based on the pregnancy period (N = 81 offspring for 44 mothers; 37 death events). A positive regression coefficient b indicates an increased likelihood for the hazard to occur (e.g., death). Means and SD of z-transformed variables and test statistics are given in Data S2. Food availability is multiplied by each group territory size. See also Table S3 and Data S2.

^aTest predictors.

^bz-transformed.

^c95% confidence intervals (CIs) and p values indicating a statistically significant effect; 95% CIs are calculated using the R function “coxph” and are based on the hazard ratios (the exponent of the coefficients b).

^dControl predictors.