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Division of General Internal Medicine

Economic Evaluation in Clinical Trials

Chapter 9: Sample Size and Power for Cost-Effectiveness Analysis

"Immediate form" programs to estimate sample size and power when the sample size and standard deviation of costs and the standard deviation of effects are common for two treatment groups (cess1i and cepow1i), to estimate sample size and power when the sample size is common between two treatment groups, but the standard deviation of costs and the standard deviation of effects differ (cess2i and cepow2i), and to estimate the sample size and power when the sample size differs between the two treatment groups, but the standard deviation of costs and effects is the same (cedssi and cedpowi). The program called ssizeprgdoc provides brief documentation for the programs. Also included is a log file that demonstrates use of the 6 programs.

Updated 4/1/10