# Incidences calculations.

### Description

A function to calculate incidence rates for every combination of age and calendar years.

### Usage

1 2 | ```
incidences(age_min, age_max, year_min, year_max, follow_up,
start_age, start_year, case)
``` |

### Arguments

`age_min` |
The age at which incidences should begin to be calculated. |

`age_max` |
The age at which incidences should stop to be calculated. |

`year_min` |
The calendar year at which indicidences should begin to be calculated. |

`year_max` |
The calendar year at which incidences should stop to be calculated. |

`follow_up` |
A vector of dimension |

`start_age` |
A vector of dimension |

`start_year` |
A vector of dimension |

`case` |
A vector of dimension |

### Details

This function can be used to obtain incidences for the functions `est.expDeath`

, `var.expDeath`

and `inference.SMR`

. A complete example of usage is provided in the help page of the `screening`

dataset.

### Value

A matrix whose first column is the number of person-years at risk, the second column is the calendar years, the third column is the ages and the fourth column is the incidence rates.

### Author(s)

Denis Talbot, Thierry Duchesne, Jacques Brisson, Nathalie Vandal.

### See Also

`est.expDeath`

, `var.expDeath`

, `inference.SMR`

, `screening`