Changing patterns of perinatal death, 1982-2000: a retrospective cohort study.
OBJECTIVE
To describe trends in cause specific stillbirth and neonatal mortality.


METHODS
Retrospective cohort study.


METHODS
686,860 births in 1982-2000, to mothers resident in the Northern Region of England.


METHODS
Cause specific stillbirth and neonatal mortality; rate ratios (RR) and 95% confidence intervals (CI) in 1991-2000 compared with 1982-1990.


RESULTS
In singletons, rates of stillbirth and neonatal mortality declined over time (RR stillbirths, 0.81 (95% CI 0.76 to 0.87); RR neonatal mortality, 0.76 (95% CI 0.70 to 0.82)). Death from congenital anomalies declined substantially for both stillbirths (RR 0.52; 95% CI 0.40 to 0.68) and neonatal mortality (RR 0.58; 95% CI 0.51 to 0.67). Mortality due to intrapartum hypoxia also fell, by nearly 50% for stillbirths and 30% for neonatal deaths. There was no reduction in stillbirths due to antepartum hypoxia in babies weighing > or = 2500 g, or in mortality attributed to infection. In multiples, the risk of death was higher (RR stillbirths, 4.13 (95% CI 3.68 to 4.64); RR neonatal death, 7.82 (95% CI 7.13 to 8.58)). Stillbirth rates declined significantly (RR 0.71; 95% CI 0.57 to 0.89) but neonatal mortality did not (RR 0.91; 95% CI 0.77 to 1.08). There was no reduction in neonatal mortality resulting from prematurity, or in mortality from congenital anomalies.


CONCLUSIONS
There is considerable overlap in the causes of stillbirth and neonatal mortality. Future progress in reducing perinatal mortality requires better understanding of the aetiology of antepartum stillbirth, of the excess risks of prematurity facing multiple births, particularly in the light of their increasing incidence, and of strategies to prevent perinatal infection.
Bell
R
R
School of Population and Health Sciences, Faculty of Medical Sciences, University of Newcastle, Newcastle upon Tyne NE2 4HH, UK. ruth.bell@ncl.ac.uk
Glinianaia
S V
SV
Rankin
J
J
Wright
C
C
Pearce
M S
MS
Parker
L
L
D000328:Adult; D001724:Birth Weight; D002423:Cause of Death; D003141:Communicable Diseases / Q000401:mortality; D000013:Congenital Abnormalities / Q000401:mortality; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000401:mortality; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D007234:Infant, Premature; D008423:Maternal Age; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D012307:Risk Factors; D014427:Twins