### Mediator model

Call:
lm(formula = bili ~ trt, data = data)

Residuals:
    Min      1Q  Median      3Q     Max 
-2.6050 -1.8125 -1.2587  0.0875 25.0950 

Coefficients:
            Estimate Std. Error t value Pr(>|t|)  
(Intercept)   1.5200     0.8489   1.791   0.0749 .
trt           0.6925     0.5336   1.298   0.1959  
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Residual standard error: 3.735 on 194 degrees of freedom
Multiple R-squared:  0.008607,	Adjusted R-squared:  0.003496 
F-statistic: 1.684 on 1 and 194 DF,  p-value: 0.1959

### Outcome model

Call:
glm(formula = spiders ~ trt + bili + trt:bili, family = poisson(link = "log"), 
    data = data)

Coefficients:
            Estimate Std. Error z value Pr(>|z|)    
(Intercept) -1.62134    0.38231  -4.241 2.23e-05 ***
trt          0.07229    0.23962   0.302  0.76288    
bili         0.12547    0.03985   3.148  0.00164 ** 
trt:bili    -0.03830    0.02405  -1.592  0.11131    
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

(Dispersion parameter for poisson family taken to be 1)

    Null deviance: 198.14  on 275  degrees of freedom
Residual deviance: 186.76  on 272  degrees of freedom
AIC: 354.76

Number of Fisher Scoring iterations: 5

### Mediation analysis 
             est          se           Z         p        lower       upper
cde   0.02240911  0.26245492  0.08538271 0.9319571  -0.49199308  0.53681130
pnde -0.05680382  0.23898764 -0.23768517 0.8121253  -0.52521099  0.41160336
tnie  0.03105934  0.02959931  1.04932651 0.2940279  -0.02695424  0.08907293
tnde -0.09499669  0.23030512 -0.41248189 0.6799863  -0.54638644  0.35639305
pnie  0.06925222  0.05511394  1.25652808 0.2089246  -0.03876913  0.17727356
te   -0.02574447  0.23520352 -0.10945616 0.9128407  -0.48673489  0.43524595
pm   -1.17267834 10.83538145 -0.10822677 0.9138158 -22.40963575 20.06427906
      exp(est) exp(lower) exp(upper)
cde  1.0226621  0.6114066   1.710544
pnde 0.9447794  0.5914306   1.509236
tnie 1.0315467  0.9734058   1.093160
tnde 0.9093759  0.5790384   1.428169
pnie 1.0717065  0.9619728   1.193958
te   0.9745841  0.6146300   1.545343
pm          NA         NA         NA

Evaluated at:
avar: trt
 a1 (intervened value of avar) = 2.3
 a0 (reference value of avar)  = 1.1
mvar: bili
 m_cde (intervend value of mvar for cde) = 1.4
cvar: 
 c_cond (covariate vector value) = 

Note that effect estimates can vary over m_cde and c_cond values when interaction = TRUE.