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SSIZEBI: Stata module to calculate sample size and power for the comparison of two or more proportions

Author

Listed:
  • Abdel G. Babiker

    (University College London Medical School)

Programming Language

Stata

Abstract

ssizebi estimates power or total sample size for tests comparing K proportions. Power is calculated if n() is specified as a positive number, otherwise total sample size is estimated. ssizebi computes sample size/power for the (global/trend) unconditional chisquare test or the conditional test based on the hypergeometric distribution with the one-step Peto approximation to the odds ratio (OR). Sample size/power is calculated in the unconditional case under either local or distant alternatives. Under local alternatives (eg max(OR,1/OR)

Suggested Citation

  • Abdel G. Babiker, 1999. "SSIZEBI: Stata module to calculate sample size and power for the comparison of two or more proportions," Statistical Software Components S365701, Boston College Department of Economics.
    • Handle: RePEc:boc:bocode:s365701
    as

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    File URL: http://fmwww.bc.edu/repec/bocode/s/ssizebi.ado
    File Function: program code
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    File URL: http://fmwww.bc.edu/repec/bocode/s/ssizebi.hlp
    File Function: help file
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