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From |
"Edgar Munoz" <munozedg@hotmail.com> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: RE: Confidence Interval for Standardized Beta Coefficients in Linear Regression |

Date |
Sat, 25 Jul 2009 15:35:47 -0500 |

My mistake --- the correct formula is SE(StdBeta_i) = [SD(x_i)/SD(y)]*SE(beta_i) In addition, the Yvar in the regress command also must be standardized, in this case the CIs are obtained directly from the output. -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Edgar Munoz Sent: Saturday, July 25, 2009 2:43 PM To: statalist@hsphsun2.harvard.edu Subject: st: RE: Confidence Interval for Standardized Beta Coefficients in Linear Regression Andres, The simplest way is using the formula: SE(StdBeta_i) = [SD(Y)/SD(X_i)]*SE(beta_i) all of those numbers are available from regress output. Also, you could running a "regress" command using the standardized Xs variables in place of the original variables. Anyway you have those standard errors, you will be able to calculate 95% CIs for each coefficient using StdBeta +/- 2*SE(StdBeta). Edgar Munoz, BS, MS Statistician Institute for Health Promotion Research School of Medicine University of Texas Health Science Center at San Antonio 210-562-6500 (main) 210-562-6511 (direct) 210-348-0554 (fax) munoze@uthscsa.edu -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Andres Fandino Losada Sent: Friday, July 24, 2009 5:20 AM To: Stata List Subject: st: Confidence Interval for Standardized Beta Coefficients in Linear Regression Dear Stata List Members, How can I obtain the Confidence Intervals for Standardized Beta Coefficients in Linear Regression Analyses? Thank you very much, Andrés. Andrés Fandiño-Losada MD. MSc (Epidemiology). PhD Student. Department of Public Health Sciences Karolinska Institute e-mail: andres.fandino@ki.se andresfandino@yahoo.com * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Confidence Interval for Standardized Beta Coefficients in Linear Regression***From:*Andres Fandino Losada <andres.fandino@ki.se>

**st: RE: Confidence Interval for Standardized Beta Coefficients in Linear Regression***From:*"Edgar Munoz" <munozedg@hotmail.com>

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