Table 3.

Best supported linear mixed models (based on the log likelihood criterion) predicting gut microbial similarity between immigrant males (n = 61 samples from 19 individuals) and long-term, adult group residents (n = 78 samples from 38 individuals)

	Fixed effects	Estimate	Standard error	DF	t	P	Direction of effect
Core
Weighted UniFrac	consecutive years in group	−0.0281	0.0106	59	−2.64	0.0106	↑ time ↓dissimilarity
Non-core
Weighted UniFrac	consecutive years in group	−0.0126	0.00306	9.39	−4.12	0.0024	↑ time ↓dissimilarity

Note: Subject identity was modeled as a random effect