btumors: brain tumors trial data

Description

brain tumors trial data

Arguments

format

A data frame with 6 rows and 4 columns

source

Schoenfeld D. Sample-size formula for the proportional-hazards regression model. Biometrics 1983 June; 39:499-503. http://www.jstor.org/stable/2531021{JSTOR}

Details

Data from a trial of primary brain tumors performed by the Radiation Therapy Oncology Group in 1978. 272 patients in total were enrolled in a trial comparing chemotherapy to chemotherapy + radiotherapy. Prognostic factors are illustrated. Columns are: [object Object],[object Object],[object Object],[object Object]