Letter

Preterm delivery in primiparous women at low risk: Preterm birth or delivery? Study authors suggest new terms

BMJ 2006; 332 doi: 10.1136/bmj.332.7549.1094-a (Published 4 May 2006)
Cite this as: BMJ 2006;332:1094.2

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  1. Ida Vogel (iv@soci.au.dk), associate professor,
  2. Ulrik Kesmodel, associate professor,
  3. Steen Rasmussen, statistician,
  4. Jens Langhoff-Roos, consultant,
  5. Bo Jacobsson, associate professor
  1. Department of Clinical Genetics, Aarhus University Hospital, DK-8000 Aarhus, Denmark
  2. NANEA at the Institute of Public Health, Department of Epidemiology, University of Aarhus, DK-8000 Aarhus
  3. National Board of Health, Health Statistics, DK-2300 Copenhagen, Denmark
  4. Juliane Marie Centre, Department of Obstetrics, Rigshospitalet, DK-2100 Copenhagen
  5. Perinatal Centre, Department of Obstetrics and Gynecology, Sahlgrenska University Hospital/Ostra, SE-41345 Gothenburg, Sweden

    EDITOR—The term preterm birth is used differently in the literature: some use preterm birth to refer to the number of infants born before 37 completed weeks,1 2 and others use the term to specify the number of pregnancies ending before 37 completed weeks.3 Still others have restricted their analyses to singleton pregnancies to avoid this difference.4 The use of the alternative term preterm delivery varies in a similar fashion. …

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