[Risk factors and perinatal consequences of short interpregnancy interval: a retrospective case-control study].
OBJECTIVE
To study the maternal risk factors and perinatal complications of a short interpregnancy interval.


METHODS
Retrospective case-control study between 2007 and 2009, comparing a group with a short interpregnancy interval (less than 9 months, n=83), and a control group (interval between two pregnancies between 18 and 24 months, n=166).


RESULTS
The main risk factor of short interpregnancy interval is to be unemployed (OR=3.2, P<0.001). There is a significant link between lack of prescription contraceptives in postpartum and a short interval between pregnancies (OR=3.4, P<0.001). We also found a higher rate of anemic women during pregnancy (OR=4.9, P=0.001) and postpartum (OR=2.1, P=0.02) in case of short interpregnancy interval. Short interpregnancy interval increases risk of small for gestational age (OR=2.4, P=0.05) and thermoregulation disorders (OR=3.1, P=0.02).


CONCLUSIONS
A low socioeconomic level is a risk factor of short interpregnancy interval. Short interpregnancy interval is at risk of maternal iron deficiency and neonatal complications like low birth weight and hypothermia.
Service d'obstétrique, CHU Anne-de-Bretagne, 16, boulevard de Bulgarie, BP 90347, 35203 Rennes cedex 2, France. laurent.vandenbroucke@yahoo.fr
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D000328:Adult; D001721:Birth Intervals; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007035:Hypothermia; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000209:etiology; D007236:Infant, Small for Gestational Age; D000090463:Iron Deficiencies; D011247:Pregnancy; D011248:Pregnancy Complications; D012189:Retrospective Studies; D012307:Risk Factors; D012959:Socioeconomic Factors; D013997:Time Factors