The<unk>  <unk>  is an epidemiological measure that indicates how many patients would require<unk> ment with a form of medication to reduce the expected<unk>  of cases of a defined endpoint by one.  It is defined as the inverse of the absolute risk reduction.
Number needed to treat
Point prevalence
Sample size
Attributable risk
Statistical significance
Biased sample
Period prevalence
Cumulative incidence