Dose response calculation for binomial regression models

```
PD(
model,
intercept = 1,
slope = 2,
prob = NULL,
x,
level = 0.5,
ci.level = 0.95,
vcov,
family,
EB = NULL
)
```

- model
Model object or vector of parameter estimates

- intercept
Index of intercept parameters

- slope
Index of intercept parameters

- prob
Index of mixture parameters (only relevant for

`zibreg`

models)- x
Optional weights length(x)=length(intercept)+length(slope)+length(prob)

- level
Probability at which level to calculate dose

- ci.level
Level of confidence limits

- vcov
Optional estimate of variance matrix of parameter estimates

- family
Optional distributional family argument

- EB
Optional ratio of treatment effect and adverse effects used to find optimal dose (regret-function argument)