The variance of the Incremental Net Monetary Benefit may also be calculated in a hypothetical situation when the standard deviation of costs and effectiveness in each group differ.

1 2 | ```
create_object_var_inmb_diff(sdc_ref, sdc_exp, sde_ref, sde_exp, rho,
object_lambda)
``` |

`sdc_ref` |
: standard deviation of costs in the reference group |

`sdc_exp` |
: standard deviation of costs in the experimental group |

`sde_ref` |
: standard deviation of effectiveness in the reference group |

`sde_exp` |
: standard deviation of effectiveness in the experimental group |

`rho` |
: coefficient of correlation between the difference in costs (dc) and the difference in effectiveness (de) |

`object_lambda` |
: object containing the ceiling cost-effectiveness ratio or maximum acceptable cost of a unit of effectiveness. See create_object_lambda |

create_object_var_inmb_diff returns an object of class VAR_INMB_DIFF which inherits from the class VAR_INMB_DIRECT

create_object_var_inmb_direct to directly provide a value for the variance of the Incremental Net Monetary Benefit

create_object_var_inmb to calculate the theoretical standard deviation of the expected INB with the same standard deviation in the reference and the experimental group

1 2 3 4 5 | ```
## First, create a lambda object
object_lambda <- create_object_lambda (20000)
## Then, create a var_inmb_diff object
var_inmb_diff <- create_object_var_inmb_diff(sdc_ref=2100, sdc_exp=2100, sde_ref = 0.12,
sde_exp = 0.12, rho = 0.1,object_lambda = object_lambda)
``` |

Questions? Problems? Suggestions? Tweet to @rdrrHQ or email at ian@mutexlabs.com.

All documentation is copyright its authors; we didn't write any of that.