{smcl}
{* 25sep2006}{...}
{hline}
help for {hi:episensrri}
{hline}

{title:Basic sensitivity analysis for binary unmeasured confounders}

{p 4 14 10}{cmd:episensrri} {it:#arr} [ {cmd:,}   {cmdab:pe:xp(}{help numlist}{cmd:)} {cmdab:pu:nexp(}{help numlist}{cmd:)} {cmdab:rrcd(}{it:#}{cmd:)} 
 {cmdab:ro:ut} {cmdab:f:ormat(%}{it:fmt}{cmd:)}  ]{p_end}

{p 4 14 10} where  {p_end}

{p 4 14 10}{it:#arr} is the apparent relative risk {p_end}

{title:Description}

{p 4 10 10}{cmd: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 {help immed}.{p_end}

{title:Options}

{p 4 8 2}{cmdab:pe:xp(}{help numlist}{cmd:)} specifies the prevalence of the unmeasured confounder among the exposed subjects. {p_end}

{p 4 8 2}{cmdab:pu:nexp(}{help numlist}{cmd:)} specifies the prevalence of the unmeasured confounder among the unexposed subjects. {p_end}

{p 4 8 2}{cmdab:rrcd(}{it:#}{cmd:)} specifies the relative risk between the unmeasured confounder and disease. {p_end}

{p 4 8 2} {cmdab:ro:ut} identifies (rule-out approach) the relative risk between the unmeasured confounder and disease 
				({cmdab:rrcd(}{it:#}{cmd:)}) such that the apparent relative risk ({it:#arr}) would move to the null (1). 
				Range for {cmdab:rrcd(}{it:#}{cmd:)} is 0 to 50. {p_end}

{p 4 8 2}{cmdab:f:ormat(%}{it:fmt}{cmd:)} specifies the display format for presenting numbers.
{cmd:format(%3.2f)} is the default; see help {help format}.{p_end}

{title:Examples}

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

{title:References}

{p 4 8 2} Schneeweiss S., 2006, Sensitivity analysis and external adjustment for unmeasured confounders in epidemiologic database studies of therapeutics.
 {it:Pharmacoepidemiol Drug Saf}, 15(5):291-303.{p_end}

{title:Authors}

{p 4 8 2}Nicola Orsini, Division of Nutritional Epidemiology,
Institute of Environmental Medicine, Karolinska Institutet, Sweden {p_end}

{p 4 8 2}Rino Bellocco, Department of Medical Epidemiology and Biostatistics,
Karolinska Institutet, Sweden {p_end}

{p 4 8 2}Sander Greenland, Department of Epidemiology, 
UCLA School of Public Health, USA {p_end}

{title:Support}

{p 4 12}{browse "http://nicolaorsini.altervista.org"}{p_end}
{p 4 12}{browse "mailto:nicola.orsini@ki.se?subject=info episensrri":nicola.orsini@ki.se}{p_end}

{title:Also see}

    Manual:  {bf:[ST] epitab}

{psee}
Online:  {helpb epitab}, {helpb episens}, {helpb episensi} (if installed)
{p_end}