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Emergency contraception use and the evaluation of barrier contraceptives. New challenges for study design,
R Dominik1, J Trussell, L Dorflinger
1Family Health International (FHI), Research Triangle Park, North Carolina 27513, USA. rdominik@fhi.org
Contraception
|March 30, 1999
Abstract:
The availability of emergency contraception (EC) introduces new complexities to barrier contraceptive evaluation. Researchers must determine whether the primary objective of interest is to measure the effectiveness of the barrier plus EC back-up or the effectiveness of the barrier alone. Barrier contraceptive effectiveness study protocols must specify what study volunteers will be told about EC, under what conditions EC will be dispensed, what information about EC use will be collected, and how EC use will be addressed during data analysis.