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Braz. j. med. biol. res ; 37(5): 737-744, May 2004. ilus, tab, graf
Artigo em Inglês | LILACS | ID: lil-357539

RESUMO

Preterm delivery is the main cause of neonatal death and ultrasonographic cervical assessment has been shown to be more accurate than digital examination in recognizing a short cervix. This is a cross-sectional study, involving 1131 women at 22-24 weeks of pregnancy, designed to determine the distribution of cervical length and to examine which variables of demographic characteristics and obstetric history increase the risk of a short cervix (15 mm or less). The distribution of maternal demographic and obstetric history characteristics among patients with cervical length ú15 mm was analyzed and compared to the findings for the general population. Risk ratios (RR) between subgroups were generated from this comparison. Median cervical length was 37 mm and in 1.5 percent of cases it was 15 mm or less. The proportion of women with a short cervix (<=15 mm) was significantly higher among patients with a low body mass index (RR = 3.5) and in those with previous fetal losses between 16-23 weeks (RR = 33.1) or spontaneous preterm deliveries between 24-32 weeks (RR = 14.1). We suggest that transvaginal sonographic measurement of cervical length be performed as part of a routine midtrimester ultrasound evaluation. There are specific variables of demographic characteristics and obstetric history which increase the risk of detecting a short cervix at 22-24 weeks.


Assuntos
Humanos , Feminino , Gravidez , Recém-Nascido , Colo do Útero , Trabalho de Parto Prematuro , Ultrassonografia Pré-Natal , Índice de Massa Corporal , Idade Gestacional , Razão de Chances , Valor Preditivo dos Testes , Segundo Trimestre da Gravidez , Fatores de Risco , Vagina
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