Objective To determine the demographics and obstetric correlates of stillbirths.
Material and Methods This was a retrospective review of 78,092 deliveries, including 468 (0.60%) stillbirths, of Hispanic and African American ethnicity in Los Angeles from 1981 to 2001. Statistical analysis was done as indicated; variables significant on univariate analysis were entered into a logistic regression analysis model; p values less than .01 were considered significant.
Results Stillbirth was associated with a higher mean maternal age (27.13 vs 25.38 years, p = .000), lower delivery gestational age (35.06 vs 39.04 weeks, p = .000), and lower birth weight (2,322.66 vs 3,321.16 g, p = .000). Logistic regression showed that stillbirth was independently associated with (all p less than .001) African American ethnicity (OR = 1.55, [95% CI 1.24-1.95]), twin pregnancy (OR = 2.50 [95% CI 1.66-3.75]), birth defects (OR = 3.06 [95% CI 1.76-5.31]), placental abruption (OR = 3.08 [95% CI 1.98-4.81]), very preterm delivery (less than 33 weeks) (OR = 2.20 [95% CI 1.67-2.91]), preterm delivery (less than 36 weeks) (OR = 1.65 [95% CI 1.22-2.23]), and low birth weight (OR = 5.39 [95% CI 4.03-7.20]). Advanced maternal age showed borderline significance (OR = 1.41 [p < .05, 95% CI 1.01-1.96]). Umbilical cord compression, any medical complication, and no prenatal care were significantly associated with stillbirth on univariate but not logistic regression analysis. Gender, nulliparity, year of delivery, hypertensive disorders, infection disorders, diabetes, and previous cesarean delivery had no significant association with stillbirth on univariate analysis.
Conclusions Stillbirths are associated with a distinct pattern of adverse obstetric outcomes. African Americans were more likely to have stillbirths when compared with Hispanics.
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