Table 5.
Summary of a permutational distance-based linear model testing the effect of age (Age), gender (Sex), pet ownership (Dog or Cat), and family size (FamSize) on unweighted and weighted UniFrac distance (measures of community dissimilarity)
| AgeGroup | Body site | Best model | AICc | Psuedo-F | p | r2 | |
| Unweighted | All | Palms (L&R) | (+)Age | −453.49 | 5.9182 | 0.001 | 2.2 |
| (+)Dog | −455.94 | 4.4837 | 0.001 | 1.19 | |||
| (+)FamSize | −454.95 | 2.0378 | 0.001 | 0.62 | |||
| Forehead | (+)Age | −264.31 | 2.7579 | 0.001 | 1.69 | ||
| Fecal | (+)Age | −269.34 | 4.3775 | 0.001 | 2.71 | ||
| Oral | (+)Age | −386.58 | 2.4774 | 0.002 | 1.5 | ||
| Adults | Palms (L&R) | (+)Dog | −284.03 | 4.303 | 0.001 | 2.43 | |
| Forehead | (+)Dog | −166.1 | 2.3878 | 0.001 | 2.33 | ||
| Fecal | None | NA | NA | NA | NA | ||
| Oral | None | NA | NA | NA | NA | ||
| Infants | Palms (L&R) | None | NA | NA | NA | NA | |
| Forehead | None | NA | NA | NA | NA | ||
| Fecal | None | NA | NA | NA | NA | ||
| Oral | None | NA | NA | NA | NA | ||
| Seniors | Palms (L&R) | None | NA | NA | NA | NA | |
| Forehead | None | NA | NA | NA | NA | ||
| Fecal | None | NA | NA | NA | NA | ||
| Oral | None | NA | NA | NA | NA | ||
| Weighted | All | Palms (L&R) | (+)Age | −727.66 | 23.597 | 0.001 | 9.05 |
| (+)Sex | −730.84 | 5.218 | 0.001 | 1.57 | |||
| (+)FamSize | −733.39 | 4.5795 | 0.002 | 0.39 | |||
| Forehead | (+)Age | −418.2 | 19.463 | 0.001 | 15.11 | ||
| (+)Sex | −423.78 | 7.6939 | 0.001 | 1.29 | |||
| (+)FamSize | −424.89 | 3.1675 | 0.028 | 0.22 | |||
| Fecal | (+)Age | −353.08 | 2.4044 | 0.061 | 1.51 | ||
| Oral | (+)FamSize | −416.32 | 3.4073 | 0.019 | 2.05 | ||
| Adults | Palms (L&R) | (+)Sex | −462.24 | 4.5058 | 0.002 | 5.36 | |
| (+)FamSize | −464.11 | 3.9149 | 0.003 | 1.09 | |||
| (+)Dog | −465.65 | 3.5858 | 0.003 | 0.22 | |||
| Forehead | (+)Sex | −295.94 | 4.3628 | 0.008 | 4.18 | ||
| Fecal | None | NA | NA | NA | NA | ||
| Oral | None | NA | NA | NA | NA |
This analysis was performed for the entire data set (All) as well as separately for age groups. The terms from the best model for each body site are shown, along with the percent of total variation explained (r2). Those terms of statistically significant and largest effect are bolded for each body site.