### Mediator model

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

Residuals:
    Min      1Q  Median      3Q     Max 
-3.4000 -2.5000 -1.7000  0.4434 24.3000 

Coefficients:
            Estimate Std. Error t value Pr(>|t|)  
(Intercept)   2.2132     0.8784   2.520   0.0123 *
trt           0.7434     0.5532   1.344   0.1801  
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Residual standard error: 4.594 on 274 degrees of freedom
Multiple R-squared:  0.006548,	Adjusted R-squared:  0.002923 
F-statistic: 1.806 on 1 and 274 DF,  p-value: 0.1801

### 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 -0.11110276 0.22700215 -0.48943482 0.6245339 -0.55601880 0.33381328
tnie  0.03334147 0.03106515  1.07327555 0.2831475 -0.02754511 0.09422805
tnde -0.15210190 0.22116506 -0.68773024 0.4916227 -0.58557746 0.28137366
pnie  0.07434062 0.05726103  1.29827589 0.1941925 -0.03788894 0.18657017
te   -0.07776129 0.22486579 -0.34581200 0.7294840 -0.51849013 0.36296756
pm   -0.40551445 1.27419891 -0.31825051 0.7502949 -2.90289842 2.09186951
      exp(est) exp(lower) exp(upper)
cde  1.0226621  0.6114066   1.710544
pnde 0.8948468  0.5734877   1.396282
tnie 1.0339035  0.9728308   1.098810
tnde 0.8589008  0.5567842   1.324949
pnie 1.0771736  0.9628199   1.205109
te   0.9251853  0.5954189   1.437589
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.