CI for treatment difference in exposure-adjusted rates — calculate_diff

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
)
#> [2024-08-14 03:49:21] >
#> 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