Study	Reason for exclusion
Andrews 2001	Only women with positive FFN were included.
Bisits 2004	Only women with positive FFN were included. They were randomized to tocolysis or not.
Elliott 2005	Only women with negative FFN were included.
Goldenberg 2001	Only women with positive FFN were included (secondary analysis of NICHD BV/TV study).
Hauth 2001	Only women with positive FFN were included.
Kalchbrenner 1999	This was a trial comparing speculum versus digital collection of FFN. There were no data regarding the results of the FFN test, and no intervention was reported based on FFN results.
Lachelin 2004	Only women with positive FFN were included. This is an ongoing trial not yet published.
Shennan 2006	Only women with positive FFN were included.

FFN: fetal fibronectin