Ectopic pregnancy {epicalc}R Documentation

Dataset of a case-control study looking at history of abortion as a risk factor for ectopic pregnancy

Description

This case-control study has one case series and two control groups.
The subjects were recruited based on three types of pregnancy outcome (outc)

Usage

data(Ectopic)

Format

A data frame with 723 observations on the following 4 variables.

id
a numeric vector
outc
a factor with levels EP IA Deli
EP = ectopic pregnancy
IA = women coming for induced abortion
Deli = women admitted for full-term delivery
hia
a factor with levels never IA ever IA
gravi
a factor with levels 1-2 3-4 >4

Examples

data(Ectopic)
library(nnet)
use(Ectopic)
multi1 <- multinom(outc ~ hia + gravi)
summary(multi1)
mlogit.display(multi1)

# Changing referent group of outcome
ep <- outc == "EP"
ia <- outc == "IA"
deli <- outc == "Deli"
multi2 <- multinom(cbind(ia, ep, deli) ~ hia + gravi)
summary(multi2)
mlogit.display(multi2)

[Package epicalc version 2.4.0.11 Index]