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help for episensrri
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Basic sensitivity analysis for binary unmeasured confounders

episensrri #arr [ , pexp(numlist) punexp(numlist) rrcd(#) rout format(%fmt) ]

where

#arr is the apparent relative risk

Description

episensrri provides basic sensitivity analysis of the apparent or observed relative risks according to specified plausible values of the prevalence of the unmeasured confounding among exposed and unexposed, and the relative risks between confounder and disease. It is an immediate command, see help immed.

Options

pexp(numlist) specifies the prevalence of the unmeasured confounder among the exposed subjects.

punexp(numlist) specifies the prevalence of the unmeasured confounder among the unexposed subjects.

rrcd(#) specifies the relative risk between the unmeasured confounder and disease.

rout identifies (rule-out approach) the relative risk between the unmeasured confounder and disease (rrcd(#)) such that the apparent relative risk (#arr) would move to the null (1). Range for rrcd(#) is 0 to 50.

format(%fmt) specifies the display format for presenting numbers. format(%3.2f) is the default; see help format.

Examples

episensrri 1.76 , pexp(0.7) punexp(0.5) rrcd(5) episensrri 1.76 , pexp(0.4(.1)0.7) punexp(0.3(.1)0.5) rrcd(5) episensrri 1.76 , pexp(0.4(.1)0.7) punexp(0.3(.1)0.5) rrcd(10) episensrri 1.86 , pexp(0.6) punexp(.2) rrcd(1.5) ro

References

Schneeweiss S., 2006, Sensitivity analysis and external adjustment for unmeasured confounders in epidemiologic database studies of therapeutics. Pharmacoepidemiol Drug Saf, 15(5):291-303.

Authors

Nicola Orsini, Division of Nutritional Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Sweden

Rino Bellocco, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Sweden

Sander Greenland, Department of Epidemiology, UCLA School of Public Health, USA

Support

http://nicolaorsini.altervista.org nicola.orsini@ki.se

Also see

Manual: [ST] epitab

Online: epitab, episens, episensi (if installed)