Data from Obel (1975) about a retrospective study of ovary cancer
carried out in 1973. Information was obtained from 299 women, who
were operated for ovary cancer 10 years before.
Usage
data("OvaryCancer")
Format
A data frame with 16 observations and 5 variables.
Freq
frequency.
stage
factor indicating the stage of the cancer at the
time of operation (early, advanced).
operation
factor indicating type of operation (radical,
limited).
survival
factor indicating survival status after 10 years
(yes, no).
xray
factor indicating whether X-ray treatment was received
(yes, no).
Source
E. B. Andersen (1991),
The Statistical Analysis of Categorical Data, Table 6.4.
References
E. B. Obel (1975),
A Comparative Study of Patients with Cancer of the Ovary Who Have
Survived More or Less Than 10 Years.
Acta Obstetricia et Gynecologica Scandinavica,
55, 429-439.
E. B. Andersen (1991),
The Statistical Analysis of Categorical Data.
2nd edition.
Springer-Verlag, Berlin.