Table 7.

Summary of a linear mixed effects analysis on the response of bacterial diversity across the body sites using the full data set and then filtered to include just adults

DOI: http://dx.doi.org/10.7554/eLife.00458.013

Age group	Body site	Fixed effects	Random effects	Model	ΔAIC	Pr(Chi)
All	Palms (L&R)	Dog + Cat + Sex + Kid	BS + Ag + Fa + FS + Pl + La	Full	0	NA
				(−)Dog	2.91	0.027
				(−)Cat	−5.60	1
				(−)Sex	1.73	0.053
				(−)Kid	−5.62	1
	Forehead	Dog + Cat + Sex + Kid	Ag + Fa + FS + Pl + La	Full	0	NA
				(−)Dog	0.57	0.11
				(−)Cat	−5.25	1
				(−)Sex	0.97	0.085
				(−)Kid	−4.22	1
	Fecal	Dog + Cat + Sex + Kid	Ag + Fa + FS + Pl + La	Full	0	NA
				(−)Dog	−0.049	0.16
				(−)Cat	−0.15	0.17
				(−)Sex	0.33	0.13
				(−)Kid	−0.13	0.17
	Oral	Dog + Cat + Sex + Kid	Ag + Fa + FS + Pl + La	Full	0	NA
				(−)Dog	1.22	0.072
				(−)Cat	−1.95	0.82
				(−)Sex	−1.88	0.73
				(−)Kid	−1.78	0.64
Adults	Palms (L&R)	Dog + Cat + Sex + Kid	BS + Fa + FS + Pl + La	Full	0	NA
				(−)Dog	4.09	0.014
				(−)Cat	−5.29	1
				(−)Sex	4.11	0.013
				(−)Kid	−5.69	1
	Forehead	Dog + Cat + Sex + Kid	Fa + FS + Pl + La	Full	0	NA
				(−)Dog	2.52	0.033
				(−)Cat	−4.99	1
				(−)Sex	−0.37	0.20
				(−)Kid	−4.38	1
	Fecal	Dog + Cat + Sex + Kid	Fa + FS + Pl + La	Full	0	NA
				(−)Dog	0.30	0.13
				(−)Cat	0.24	0.13
				(−)Sex	−1.44	0.45
				(−)Kid	−0.42	0.21
	Oral	Dog + Cat + Sex + Kid	Fa + FS + Pl + La	Full	0	NA
				(−)Dog	−0.29	0.19
				(−)Cat	−6.50	1
				(−)Sex	−7.22	1
				(−)Kid	−5.41	1

The factors tested are co-habitation of dogs (Dog), cats (Cat), children (Kid) and host gender (Sex). The base model takes into account the variability between age groups (Ag), families (Fa), family sizes (FS), sequencing lanes (La), and primer plates (Pl). Variability between left and right palms (BS) is also controlled for in the palm model. The change in model fit resulting from exclusion of each fixed effect based on Akaike's Information Criterion (AIC) is shown. Statistically significant values are in bold text.