forestsearch (version 0.1.0)

cox_summary: Cox model summary for subgroup (OPTIMIZED)

Description

Called in analyze_subgroup() <-- SG_tab_estimates

Usage

cox_summary(
  Y,
  E,
  Treat,
  Strata = NULL,
  use_strata = !is.null(Strata),
  return_format = c("formatted", "numeric")
)

Value

Character string with formatted HR and CI (or numeric vector if return_format="numeric").

Arguments

Y

Numeric vector of outcome.

E

Numeric vector of event indicators.

Treat

Numeric vector of treatment indicators.

Strata

Vector of strata (optional).

use_strata

Logical. Whether to use strata in the model (default: TRUE if Strata provided).

return_format

Character. "formatted" (default) or "numeric" for downstream use.

Details

Calculates hazard ratio and confidence interval for a subgroup using Cox regression. Optimized version with reduced overhead and better error handling.

Examples

# \donttest{
library(survival)
cox_summary(
  Y     = gbsg$rfstime / 30.4375,
  E     = gbsg$status,
  Treat = gbsg$hormon
)
# }