AA.data {survBayes}R Documentation

Shrinkage of aneurisms

Description

Data on the shrinkage of aneurisms associated with cerebral arteriovenous malformations (cAVM) after treatment. The time to a shrinkage of the aneurism to below 50% of the baseline volume was of interest. There is one random inspection time (current status). The data is given in interval notation. Several patients had multiple aneurisms.

Usage

data(AA.data)

Format

A data frame with 149 observations on the following 6 variables.

z
censoring variable
mo
the degree of cAMV occlusion by embolization (dichotomized at 50% )
lok
the location of the aneurism, whether at the midline arteries or at other afferent cerebral arteries
gr
The single aneurisms are not independent because aneurisms within a patient may shrink in the same way. Multiple aneurisms were observed per patient. This clustering of aneurisms is indicated by this grouping variable.
t.left
time of the begin of the interval
t.right
time of the end of the interval

Source

H.~J. Meisel, U.~Mansmann, H.~Alvarez, G.~Rodesch, M.~Brock, and P.~Lasjaunias. Cerebral arteriovenous malformations and associated aneurysms: Analysis of 305 cases from a series of 662 patients. {em Neurosurgery}, 46:793–802, 2000.

Examples

data(AA.data)

[Package survBayes version 0.1.5 Index]