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CSTI: Stata module that modifies csi command in order to use total numbers rather than individual cell counts

Author

Listed:
  • Philip M Jones

    (University of Western Ontario)

Programming Language

Stata

Abstract

Binary outcomes (such as mortality) are typically published in a Table as the number of events over the number of patients or subjects in the group, i.e. "n/N". If one wants to compute a risk ratio and P value, Stata's -csi- command can be used. However, to use -csi- it is first necessary to calculate, within each group, the difference between the total number of subjects and the number of events. This is because -csi- expects the data to be entered as individual cell counts rather than "events" and "total subjects”. -csti- allows you to enter the n/N naturally and avoids having to compute the difference between the total subjects and number of events. The command is implemented as a wrapper for -csi- built-into Stata. For example, if 23/130 patients died in an Intervention group while 13/127 patients died in a control group, Stata's -csi- syntax would be "csi 23 13 107 114”, whereas when using -csti-, the command becomes "csti 23 130 13 127”.

Suggested Citation

  • Philip M Jones, 2014. "CSTI: Stata module that modifies csi command in order to use total numbers rather than individual cell counts," Statistical Software Components S457914, Boston College Department of Economics, revised 04 Oct 2014.
    • Handle: RePEc:boc:bocode:s457914
    Note: This module should be installed from within Stata by typing "ssc install csti". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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    File URL: http://fmwww.bc.edu/repec/bocode/c/csti.ado
    File Function: program code
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    File URL: http://fmwww.bc.edu/repec/bocode/c/csti.sthlp
    File Function: help file
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    More about this item

    Keywords

    csi; risk ratio; relative risk; Stata;
    All these keywords.

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