README.md

Package directadjusting

Compute estimates and confidence intervals of weighted averages quickly and easily.

Recommended installation

devtools::install_github(
  "FinnishCancerRegistry/directadjusting",
  ref = readline("enter latest tag on github: ")
)

Example

library("directadjusting")

# suppose we have poisson rates that we want to adjust for by age group.
# they are stratified by sex.
library("data.table")
set.seed(1337)

offsets <- rnorm(8, mean = 1000, sd = 100)
baseline <- 100
sex_hrs <- rep(1:2, each = 4)
age_group_hrs <- rep(c(0.75, 0.90, 1.10, 1.25), times = 2)
counts <- rpois(8, baseline * sex_hrs * age_group_hrs)

# raw estimates
my_stats <- data.table(
  sex = rep(1:2, each = 4),
  ag = rep(1:4, times = 2),
  e = counts / offsets
)
my_stats[["v"]] <- my_stats[["e"]] / offsets

# adjusted by age group
my_adj_stats <- direct_adjusted_estimates(
  stats_dt = my_stats,
  stat_col_nms = "e",
  var_col_nms = "v",
  conf_lvls = 0.95,
  conf_methods = "log",
  stratum_col_nms = "sex",
  adjust_col_nms = "ag",
  weights = c(200, 300, 400, 100)
)