We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSecular trends in preterm birth: a hospital-based cohort study.AuthorsKramer, M S; Platt, R; Yang, H; Joseph, K S; Wen, S W; Morin, L; Usher, R HAbstractCanada and the United States have reported a recent increase in the incidence of preterm birth, but the reasons for this increase are unknown.PublicationJAMA, 1998, Vol 280, Issue 21, p1849ISSN0098-7484Publication typeJournal ArticleDOI10.1001/jama.280.21.1849