Table 3.
Results of linear regression models with Shannon index as the dependent variable
| A. Model summary | ||||||
|---|---|---|---|---|---|---|
| R2 | ΔR2 | F change | df1 | df2 | p | |
| Unadjusted | 0.0144 | 44.31 | 1 | 3033 | <0.0001 | |
| Model 1 | 0.1568 | 0.1423 | 63.86 | 8 | 3025 | <0.0001 |
| Model 2 | 0.1720 | 0.0155 | 13.91 | 4 | 3021 | <0.0001 |
| Model 3 | 0.1831 | 0.0112 | 8.15 | 5 | 3016 | <0.0001 |
| B. Overview of coefficients | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dependent: | Unadjusted | Model 1 | Model 2 | Model 3 | |||||||||
| Shannon index | B | t | p | B | t | p | B | t | p | B | t | p | |
| PHQ-9 | (sum-score) | −0.1200 | −6.66 | 0.0000 | −0.0664 | −3.84 | 0.0001 | −0.0544 | −3.15 | 0.0016 | −0.0388 | −2.22 | 0.0263 |
| Gender | (Women = 1) | 0.0839 | 4.95 | 0.0000 | 0.0721 | 4.06 | 0.0000 | 0.0740 | 4.18 | 0.0000 | |||
| Age | 0.0571 | 3.17 | 0.0015 | 0.0663 | 3.66 | 0.0003 | 0.0768 | 4.13 | 0.0000 | ||||
| Education | 0.1089 | 5.64 | 0.0000 | 0.0913 | 4.70 | 0.0000 | 0.0850 | 4.39 | 0.0000 | ||||
| Smoker | (Yes = 1) | −0.0621 | −3.52 | 0.0004 | −0.0619 | −3.52 | 0.0004 | ||||||
| Physical activity | (min/wk*intensity) | 0.0078 | 0.46 | 0.6429 | 0.0064 | 0.38 | 0.7018 | ||||||
| Audit alcohol | (sum) | −0.0555 | −2.85 | 0.0044 | −0.0545 | −2.81 | 0.0050 | ||||||
| BMI | (kg/m2) | −0.1036 | −5.77 | 0.0000 | −0.0995 | −5.52 | 0.0000 | ||||||
| GI disorder | (yes = 1) | −0.0318 | −1.88 | 0.0600 | |||||||||
| Diabetes | (yes = 1) | −0.0408 | −2.29 | 0.0219 | |||||||||
| Diarrhea | (yes = 1) | −0.0523 | −3.12 | 0.0018 | |||||||||
| PPI | (yes = 1) | 0.0001 | 0.00 | 0.9976 | |||||||||
| Antibiotics | (yes = 1) | −0.0709 | −4.29 | 0.0000 | |||||||||
Tables present model summary (A) and overview of standardized regression coefficients (β) of predictor and covariates. Unstandardized values and constants are omitted for clarity. Models 1 to 3 also include ethnicity. Coefficients for ethnicity are reported separately in the text.