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Low 5-minute Apgar score: a population-based register study of 1 million term births

Thorngren-Jerneck, Kristina LU and Herbst, Andreas LU (2001) In Obstetrics and Gynecology 98(1). p.65-70
Abstract
OBJECTIVE: To determine the rate of 5-minute Apgar scores below 7 in term infants (at least 37 weeks) in Sweden during 1988-1997, evaluate the influence of obstetric risk factors on low 5-minute Apgar scores, and to study the infant prognosis regarding infant mortality, neonatal neurologic morbidity, and outcome. METHODS: Data were collected from the Swedish Medical Birth Registry 1988-1997, and the National Hospital Discharge Registry. Odds ratios (OR) and risk ratios were calculated. RESULTS: Among 1,028,705 term newborns, 7787 (0.76%) had 5-minute Apgar scores below 7. The annual rate of low Apgar scores decreased from 0.77% in 1988 to 0.63% in 1992, but thereafter increased to 0.82% in 1998. The highest OR was found for vaginal breech... (More)
OBJECTIVE: To determine the rate of 5-minute Apgar scores below 7 in term infants (at least 37 weeks) in Sweden during 1988-1997, evaluate the influence of obstetric risk factors on low 5-minute Apgar scores, and to study the infant prognosis regarding infant mortality, neonatal neurologic morbidity, and outcome. METHODS: Data were collected from the Swedish Medical Birth Registry 1988-1997, and the National Hospital Discharge Registry. Odds ratios (OR) and risk ratios were calculated. RESULTS: Among 1,028,705 term newborns, 7787 (0.76%) had 5-minute Apgar scores below 7. The annual rate of low Apgar scores decreased from 0.77% in 1988 to 0.63% in 1992, but thereafter increased to 0.82% in 1998. The highest OR was found for vaginal breech delivery (OR 6.7), birth weights above 5 kg (OR 6.3), and second born twins (OR 4.1). Primiparity, maternal age, smoking, post-date pregnancy, epidural analgesia, male infant gender, and being born at night, were also significant risk factors for Apgar below 7 at 5 minutes. The infant mortality rate was 48 per 1000 (OR 14.4), and the ORs were 31.4 for a diagnosis with cerebral palsy, 7.9 for epilepsy, and 9.5 for mental retardation. CONCLUSION: Several obstetric risk factors are associated with low 5-minute Apgar score in term infants. Mortality and the risk of severe neurologic morbidity are increased in these infants. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Obstetrics and Gynecology
volume
98
issue
1
pages
65 - 70
publisher
Lippincott Williams & Wilkins
external identifiers
  • pmid:11430958
  • scopus:0034935475
ISSN
1873-233X
language
English
LU publication?
yes
id
17141747-6e56-4f5c-b082-1ee654ab6fba (old id 1120624)
alternative location
http://www.greenjournal.org/cgi/content/full/98/1/65
date added to LUP
2016-04-01 16:10:37
date last changed
2022-03-30 05:54:18
@article{17141747-6e56-4f5c-b082-1ee654ab6fba,
  abstract     = {{OBJECTIVE: To determine the rate of 5-minute Apgar scores below 7 in term infants (at least 37 weeks) in Sweden during 1988-1997, evaluate the influence of obstetric risk factors on low 5-minute Apgar scores, and to study the infant prognosis regarding infant mortality, neonatal neurologic morbidity, and outcome. METHODS: Data were collected from the Swedish Medical Birth Registry 1988-1997, and the National Hospital Discharge Registry. Odds ratios (OR) and risk ratios were calculated. RESULTS: Among 1,028,705 term newborns, 7787 (0.76%) had 5-minute Apgar scores below 7. The annual rate of low Apgar scores decreased from 0.77% in 1988 to 0.63% in 1992, but thereafter increased to 0.82% in 1998. The highest OR was found for vaginal breech delivery (OR 6.7), birth weights above 5 kg (OR 6.3), and second born twins (OR 4.1). Primiparity, maternal age, smoking, post-date pregnancy, epidural analgesia, male infant gender, and being born at night, were also significant risk factors for Apgar below 7 at 5 minutes. The infant mortality rate was 48 per 1000 (OR 14.4), and the ORs were 31.4 for a diagnosis with cerebral palsy, 7.9 for epilepsy, and 9.5 for mental retardation. CONCLUSION: Several obstetric risk factors are associated with low 5-minute Apgar score in term infants. Mortality and the risk of severe neurologic morbidity are increased in these infants.}},
  author       = {{Thorngren-Jerneck, Kristina and Herbst, Andreas}},
  issn         = {{1873-233X}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{65--70}},
  publisher    = {{Lippincott Williams & Wilkins}},
  series       = {{Obstetrics and Gynecology}},
  title        = {{Low 5-minute Apgar score: a population-based register study of 1 million term births}},
  url          = {{http://www.greenjournal.org/cgi/content/full/98/1/65}},
  volume       = {{98}},
  year         = {{2001}},
}