. Author manuscript; available in PMC: 2016 Jan 31.

Published in final edited form as: Am J Obstet Gynecol. 2014 Jul 11;212(2):145–156. doi: 10.1016/j.ajog.2014.07.003

Table 1.

Characteristics of comprehensive cervical screening for precocious cervical ripening to predict singleton preterm delivery in large observational cohort studies, 1980–2014

Author, Published Year	Screen period	Location, venue	Population	Gestational weeks	Exam
Papiernik et al., 1986²⁷	1971–1976	^*Haguenau, France	4430	18, 19–24, 25–28, 29–31, 32–34, and 35–36	DE
Bouyer et al., 1986⁶¹	Ibid	Ibid	4390	18, 19–24, 25–28, 29–31, 32–34, and 35–36	DE
Mortensen et al,1987⁶⁵	1982	^*Skaraborg, Sweden	581	24, 28 & 32	DE
Hartmann et al,1999⁷⁵	1995–2000	4 sites in North Carolina, USA	871	24–29	DE
Newman et al., 2008⁷⁷ Iams et al., 1996⁸	1992–1994 Ibid	10-site MFMU network, USA Ibid	2916, 2538 2915, 2531	22–24, 26–29 Ibid	DE & TVU DE & TVU
Hasegawa et al,1996⁸¹	1994	10 centers, Japan	729	15–34	TVU
Taipale & Hiilesmaa, 1998⁶³	1995–1996	^*Helsinki, Finland	3694	18–22	TVU
To et al., 2001⁶⁴	1997–2000	^*London, the UK	6334	22–24	TVU
de Carvalho et al, 2005⁷⁶	1998–2001	São Paulo, Brazil	1958	21–24	TVU
Leung et al, 2005⁶²	2000–2002	^*Hong Kong, China	2880	18–22	TVU
Parra-Saavedra et al., 2011⁸⁰	2009–2010	Barranquilla, Colombia	1115	5–36	TVU

Note: DE: digital examination; TVU: transvaginal sonography.

for routine care. Ibid, the same as above; MFMU, NIH Maternal Fetal Medicine Unit Network in the U.S.