Studies on Lung Cancer Risk from ETS Exposure
Results from 37 studies on the risk of lung cancer from environmental tobacco smoke (ETS) exposure.
dat.hackshaw1998
The data frame contains the following columns:
| study | numeric |
study number |
| author | character |
first author of study |
| year | numeric |
publication year |
| country | character |
country where study was conducted |
| design | character |
study design (either cohort or case-control) |
| cases | numeric |
number of lung cancer cases |
| yi | numeric |
log odds ratio |
| vi | numeric |
corresponding sampling variance |
The dataset includes the results from 37 studies (4 cohort, 33 case-control) on the risk of lung cancer from environmental tobacco smoke (ETS) exposure from the spouse in women who are lifelong nonsmokers. Values of the log odds ratio greater than 0 indicate an increased risk of cancer in exposed women compared to women not exposed to ETS from their spouse.
Hackshaw, A. K., Law, M. R., & Wald, N. J. (1997). The accumulated evidence on lung cancer and environmental tobacco smoke. British Medical Journal, 315, 980–988.
Hackshaw, A. K. (1998). Lung cancer and passive smoking. Statistical Methods in Medical Research, 7, 119–136.
### copy data into 'dat' and examine data dat <- dat.hackshaw1998 dat ### random-effects model using the log odds ratios res <- rma(yi, vi, data=dat, method="DL") res ### estimated average odds ratio with CI (and credibility/prediction interval) predict(res, transf=exp, digits=2)
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