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Research article

First published 2003-3

Sample Size Calculations for Main Effects and Interactions in Case–control Studies using Stata's nchi2 and npnchi2 Functions

Catherine L. Saunders, D. Timothy Bishop, Jennifer H. Barrett

The Stata Journal: Promoting communications on statistics and Stata

Free access

Research article

First published 2003-3

Christopher F. Baum, Mark E. Schaffer, Steven Stillman

The Stata Journal: Promoting communications on statistics and Stata

Free access

Research article

First published 2003-3

Germán Rodríguez, Irma Elo

The Stata Journal: Promoting communications on statistics and Stata