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From |
Roger Newson <r.newson@imperial.ac.uk> |

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

Subject |
Re: st: tabulation of comparison outcomes in -somersd- |

Date |
Thu, 21 Oct 2010 19:50:22 +0100 |

I hope this helps. Best wishes Roger References

Roger B Newson BSc MSc DPhil Lecturer in Medical Statistics Respiratory Epidemiology and Public Health Group National Heart and Lung Institute Imperial College London Royal Brompton Campus Room 33, Emmanuel Kaye Building 1B Manresa Road London SW3 6LR UNITED KINGDOM Tel: +44 (0)20 7352 8121 ext 3381 Fax: +44 (0)20 7351 8322 Email: r.newson@imperial.ac.uk Web page: http://www.imperial.ac.uk/nhli/r.newson/ Departmental Web page: http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/ Opinions expressed are those of the author, not of the institution. On 21/10/2010 19:08, Feiveson, Alan H. (JSC-SK311) wrote:

Hi - I believe Somers' D is equal to (P - N)/T, where P = # positive relevant comparisons, N = # negative relevant comparisons, and T = total # of relevant comparisons, where in -somersd- "relevant" is determined by non-occurrence of ties in the first variable and whichever strata/within/between comparisons I specify. So after running -somersd- I wish to record the values of P, N and T. Does anyone know if this information is accessible after running -somersd- ? Al Feiveson * * 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/

**Follow-Ups**:**RE: st: tabulation of comparison outcomes in -somersd-***From:*Nick Cox <n.j.cox@durham.ac.uk>

**References**:**st: tabulation of comparison outcomes in -somersd-***From:*"Feiveson, Alan H. (JSC-SK311)" <alan.h.feiveson@nasa.gov>

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