infert

Infertility after Spontaneous and Induced Abortion

This is a matched case-control study dating from before the availability of conditional logistic regression.

Keywords
datasets
Usage
infert
Note

One case with two prior spontaneous abortions and two prior induced abortions is omitted.

Format

1. Education
0 = 0-5 years
1 = 6-11 years
2 = 12+ years 2.
age age in years of case
3. parity
count 4.
number of prior 0 = 0
induced abortions
1 = 1
2 = 2 or more
5. case status
1 = case
0 = control
6. number of prior
0 = 0
spontaneous abortions 1 = 1
2 = 2 or more 7.
matched set number 1-83

Source

Trichopoulos et al (1976) Br. J. of Obst. and Gynaec. 83, 645--650.

Aliases
  • infert
Examples
library(datasets) require(stats) model1 <- glm(case ~ spontaneous+induced, data = infert, family = binomial()) summary(model1) ## adjusted for other potential confounders: summary(model2 <- glm(case ~ age+parity+education+spontaneous+induced, data = infert, family = binomial())) ## Really should be analysed by conditional logistic regression ## which is in the survival package if(require(survival)){ model3 <- clogit(case ~ spontaneous+induced+strata(stratum), data = infert) print(summary(model3)) detach() # survival (conflicts) }
Documentation reproduced from package datasets, version 3.1.1, License: Part of R 3.1.1

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