Survival and morbidity of extremely premature infants based on obstetric assessment of gestational age

Changing prognosis for babies of less than 28 weeks' gestation in the north of England between 1983 and 1994

“…Survival has been a little higher in some of the hospital based studies published from centres in Australia,15161718 Canada,192021222324 and the United States,25 26 but it is widely recognised that the results achieved by a specialist institution do not always reflect those found in the population at large. Only a minority of studies report survival to 1 year rather than survival to discharge, and many exclude lethal malformation.…”

Actuarial Survival in the Premature Infant Less Than 30 Weeks' Gestation

“…Previous studies have characterized survival rates from birth among preterm infants, [1][2][3][4][5] and these data are commonly used by physicians and parents in making decisions concern-ing resuscitation and provision of aggressive care at or around birth. When data is presented in a series of actuarial-survival curves, stratified by either 100-g birth weight or 1-week gestational age intervals it is visually obvious that actuarial survival changes during the first 90 days of life, such that the survival rate improves most quickly during the first few days of life regardless of birth weight or gestational-age strata.…”

“…[1][2][3][4][5] This information is provided as a single survival rate from admission to discharge for each birth weight or gestationalage category. [1][2][3][4][5] This information is provided as a single survival rate from admission to discharge for each birth weight or gestationalage category.…”