title: Trends in prevalence and survival of very low birthweight infants, England and Wales: 1983-7.
abstract: Between 1983 and 1987 over 99% of all infants born in England and Wales had their birth weights recorded when the birth was registered. Trends in occurrence and one year survival of those who weighed under 1500 g at birth have been calculated in 100 g groups, separately for single and multiple births. By 1987 singleton live births in England and Wales who weighed between 700 and 799 g had a 43% chance of surviving to 1 year compared with a 32% chance five years earlier; those who weighed 800 to 899 g had a 55% chance compared with 46%. The absolute number of survivors weighing between 500 and 999 g at birth increased by nearly 50% between 1983 and 1987, and there was a 30% increase overall in survivors weighing less than 1500 g.
authors.affiliation: Department of Environmental and Preventive Medicine, St Bartholomew's Medical College, Charterhouse Square, London.
authors.forename: E
authors.initials: E
authors.lastname: Alberman
authors.forename: B
authors.initials: B
authors.lastname: Botting
mesh_terms: D000367:Age Factors; D001724:Birth Weight; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality / Q000639:trends*; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008297:Male; D015995:Prevalence; D014852:Wales