text_summary: Generates a textual summary of a group sequential design...

In gsDesign2: Group Sequential Design with Non-Constant Effect

Generates a textual summary of a group sequential design using the AHR method.

Description

Generates a textual summary of a group sequential design using the AHR method.

Usage

text_summary(x, information = FALSE, time_unit = "months")

Arguments

x	A design object created by gs_design_ahr() with or without to_integer().
information	A logical value indicating whether to include statistical information in the textual summary. Default is FALSE.
time_unit	A character string specifying the time unit used in the design. Options include "days", "weeks", "months" (default), and "years".

Value

A character string containing a paragraph that summarizes the design.

Examples

library(gsDesign)

# Text summary of a 1-sided design
x <- gs_design_ahr(info_frac = 1:3/3, test_lower = FALSE) %>% to_integer()
x %>% text_summary()

# Text summary of a 2-sided symmetric design
x <- gs_design_ahr(info_frac = 1:3/3,
                   upper = gs_spending_bound, lower = gs_spending_bound,
                   upar = list(sf = sfLDOF, total_spend = 0.025),
                   lpar = list(sf = sfLDOF, total_spend = 0.025),
                   binding = TRUE, h1_spending = FALSE) %>% to_integer()
x %>% text_summary()

# Text summary of a asymmetric 2-sided design with beta-spending and non-binding futility bound
x <- gs_design_ahr(info_frac = 1:3/3, alpha = 0.025, beta = 0.1,
                   upper = gs_spending_bound, lower = gs_spending_bound,
                   upar = list(sf = sfLDOF, total_spend = 0.025),
                   lpar = list(sf = sfHSD, total_spend = 0.1, param = -4),
                   binding = FALSE, h1_spending = TRUE) %>% to_integer()
x %>% text_summary()

# Text summary of a asymmetric 2-sided design with fixed non-binding futility bound
x <- gs_design_ahr(info_frac = 1:3/3, alpha = 0.025, beta = 0.1,
                   upper = gs_spending_bound, lower = gs_b,
                   upar = list(sf = sfLDOF, total_spend = 0.025),
                   test_upper = c(FALSE, TRUE, TRUE),
                   lpar = c(-1, -Inf, -Inf),
                   test_lower = c(TRUE, FALSE, FALSE),
                   binding = FALSE, h1_spending = TRUE) %>% to_integer()
x %>% text_summary()

# If there are >5 pieces of HRs, we provide a brief summary of HR.
gs_design_ahr(
  fail_rate = define_fail_rate(duration = c(rep(3, 5), Inf),
                               hr = c(0.9, 0.8, 0.7, 0.6, 0.5, 0.4),
                               fail_rate = log(2) / 10, dropout_rate = 0.001),
  info_frac = 1:3/3, test_lower = FALSE) %>%
  text_summary()

gsDesign2 documentation built on June 8, 2025, 12:26 p.m.