February, 2003
© 2000, 2001, 2003 Scott S. Emerson, M.D., Ph.D.
Often we
have many choices for the summary measure to be compared across
treatment groups
Example:
Treatment of high blood pressure with a primary outcome of systolic
blood pressure at end of treatment
Statistical analysis
might for example compare
·Average
·Median
·Percent
above 160 mm Hg
·Mean or
median time until blood pressure below 140 mm Hg