TABLE 1.
Linear mixed-effects model results for Bifidobacterium relative abundances between 6 and 18 months of life in the ECAM studya
| Model | Variable or parameter | Estimate | SE | Z-score | P value |
|---|---|---|---|---|---|
| Fixed effects | (Intercept) | 0.465 | 0.101 | 4.579 | <0.001 |
| Delivery [T.vaginal] | –0.114 | 0.097 | –1.181 | 0.238 | |
| Diet [T.formula-dominant] | –0.33 | 0.126 | –2.612 | 0.009 | |
| Sex [T.male] | –0.064 | 0.086 | –0.743 | 0.457 | |
| Delivery [T.vaginal]:diet [T.fd] | 0.46 | 0.177 | 2.605 | 0.009 | |
| Month | –0.015 | 0.017 | –0.904 | 0.366 | |
| Random effects | Intercept (subject ID) | 0.037 | 0.132 | ||
| Slope (change per mo) | 0.012 | 0.02 | |||
| Covariance (intercept, time) | –0.004 | 0.228 |
a
Parameter estimate (coefficient), standard error, Z score, and P value for each model parameter. Brackets indicate reference groups for interpreting fixed-effect estimates.