R: NCCTG Lung Cancer Data

lung {survival} | R Documentation

## NCCTG Lung Cancer Data

### Description

Survival in patients with advanced lung cancer from the North Central Cancer Treatment Group. Performance scores rate how well the patient can perform usual daily activities.

### Usage

    lung
    cancer

### Format

inst: | Institution code
time: | Survival time in days
status: | censoring status 1=censored, 2=dead
age: | Age in years
sex: | Male=1 Female=2
ph.ecog: | ECOG performance score as rated by the physician. 0=asymptomatic, 1= symptomatic but completely ambulatory, 2= in bed <50% of the day, 3= in bed > 50% of the day but not bedbound, 4 = bedbound
ph.karno: | Karnofsky performance score (bad=0-good=100) rated by physician
pat.karno: | Karnofsky performance score as rated by patient
meal.cal: | Calories consumed at meals
wt.loss: | Weight loss in last six months

### Note

The use of 1/2 for alive/dead instead of the usual 0/1 is a historical footnote. For data contained on punch cards, IBM 360 Fortran treated blank as a zero, which led to a policy within the section of Biostatistics to never use "0" as a data value since one could not distinguish it from a missing value. The policy became a habit, as is often the case; and the 1/2 coding endured long beyond the demise of punch cards and Fortran.

### Source

Terry Therneau

### References

Loprinzi CL. Laurie JA. Wieand HS. Krook JE. Novotny PJ. Kugler JW. Bartel J. Law M. Bateman M. Klatt NE. et al. Prospective evaluation of prognostic variables from patient-completed questionnaires. North Central Cancer Treatment Group. Journal of Clinical Oncology. 12(3):601-7, 1994.

[Package survival version 3.2-7 Index]