cass1 {twostage} | R Documentation |
This is a pilot dataset from the Coronary Artery Surgery Study (CASS) and is discussed in Reilly (1996). It consists of a random sample of 25 subjects from each stratum defined by different levels of mortality and sex. The "first-stage" data from which this pilot sample was chosen had 8096 observations. There are three variables in the pilot dataset (see Data Description).
The dataset has 100 observations with 3 variables arranged in the
following columns:
Column 1 (Mortality)
The operative mortality of the patients
(0 = Alive, 1 = Dead)
Column 2 (age)
Column 3 (sex)
(0 = Male, 1 = Female)
Vliestra, et.al. (1980)
Reilly,M. 1996. Optimal sampling strategies for two-stage studies. Amer. J. Epidemiol. 143:92-100
Vliestra,R.E.,Frye R.L., Kromnal R.A.,et.al.(1980). Risk factors and angiographic coronary artery disease: a report from the Coronary Artery Surgery Study (CASS). Circulation 62:254-61
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