Efficacy studies in natural family planning: issues and management implications illustrated with data from five studies.

Labbok, M H; Klaus, H; Perez, A · Am J Obstet Gynecol · 1991

review · Level V

Where this comes from

Abstract

Studies of method effectiveness must be carefully assessed for comparability of findings. Several parameters are identified that are important in the assurance of comparable results. This article discusses these issues with the use of data from previously published studies and emphasizes the management implications of use-effectiveness data.

Medical subject headings