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. 1999 May;80(3):F221-5.
doi: 10.1136/fn.80.3.f221.

Relation between size of delivery unit and neonatal death in low risk deliveries: population based study

D Moster  1 , R T Lie, T Markestad
Affiliations

Relation between size of delivery unit and neonatal death in low risk deliveries: population based study

D Moster et al. Arch Dis Child Fetal Neonatal Ed. 1999 May.

Abstract

Aim: To examine risk of neonatal death after low risk pregnancies in relation to size of delivery units.

Methods: A population based study of live born singleton infants in Norway with birthweights of at least 2500 g was carried out. Antenatal risk factors were adjusted for.

Results: From 1972 to 1995, 1.25 million births fulfilled the criteria. The neonatal death rate was lowest for maternity units with 2001-3000 annual births and steadily increased with decreasing size of the maternity unit to around twice that for units with less than 100 births a year (odds ratio 2.1; 95 % confidence interval 1.6 to 2.8). Institutions with more than 3000 deliveries a year also had a higher rate (odds ratio 1.7; 95% CI 1.4 to 2.0), but analyses suggest that this rate is overestimated.

Conclusion: Around 2000 to 3000 annual births are needed to reduce the risk of neonatal deaths after low risk deliveries.

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