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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)
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author
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
2008-07-16 10:21:56
date last changed
2018-04-22 03:57:31
@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},
  volume       = {98},
  year         = {2001},
}