oc_breast {dosresmeta}

Twenty-two case-control studies on the relation between oral contraceptives use and breast cancer

Description

The dataset reports the summarized dose-response results from twenty-two case-control studies on the relation between oral contraceptives use and breast cancer

Format

A data frame with 113 observations on the following 14 variables:

id	id of the studies included in the analysis.
author	names of the first author.
year	year of publication.
type	code for study design.
duration	assigned dose levels.
cases	number of cases for each exposure level.
n	total number of subjects (type = "ir" or "cc") or person-years (type = "ir") for each exposure level.
or	adjusted odds ratios.
lb	lower bound for the confidence limits of the adjusted odds ratios.
ub	upper bound for the confidence limits of the adjusted odds ratios.
logor	natural logarithm of the adjusted odds ratios.
se	standard error for the logarithm of the adjusted odds ratios.
menopause	indicator variable for a study that included postmenopausal women (1 = yes).
period	final year of case accrual (surrogate for the changing formulations of oral contraceptives over time).

Author(s)

Alessio Crippa, <[e-mail]>

References

Berlin JA, Longnecker MP, Greenland S. Meta-analysis of epidemiologic dose-response data. Epidemiology. 1993 May 1:218-28.