CI for treatment difference in exposure-adjusted rates

Derive mean difference and associated confidence intervals for exposure-adjusted rates (per 100 PYs)

calculate_diff_rates(rate1, rate2, py1, py2, cl = 0.95)

Arguments

rate1

(numeric)
Event or incidence rate (per 100 PYs) in active treatment

rate2

(numeric)
Event or incidence rate (per 100 PYs) in comparator treatment

py1

(numeric)
100PEY or 100PYAR in active treatment

py2

(numeric)
100PEY or 100PYAR in comparator treatment

cl

(numeric)
confidence level

Examples

calculate_diff_rates(
  rate1 = 152.17, rate2 = 65.21, py1 = 230, py2 = 230,
  cl = 0.95
)
#> [2025-02-12 02:27:09] >
#> CI for treatment difference in exposure-adjusted rates
#> is calculated and saved in a dataframe
#>    diff        se    lower    upper
#> 1 86.96 0.9721782 85.05457 88.86543