eha (version 1.4)

fert: Marital fertility nineteenth century

Description

Birth intervals for married women with at least one birth, 19th northern Sweden

Usage

data(fert)

source

Data is coming from The Demographic Data Base, Umea University, Umea, Sweden.

Details

The data set contain clusters of dependent observations defined by mother's id.

References

http://www.ddb.umu.se

Examples

data(fert)
fit <- coxreg(Surv(next.ivl, event) ~ ses + prev.ivl, data = fert, subset =
(parity == 1))
drop1(fit, test = "Chisq")