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JAMA. 2000;284:1919-1920.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

MMWR. 2000;49:837-840

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National infant mortality rates among non-Hispanic black women are twice those of non-Hispanic white women.¹ Nearly two-thirds of this disparity is attributable to a higher rate of preterm delivery (PTD) (i.e., 37 weeks' gestation) among blacks.² To investigate state-specific changes in PTD rates among blacks and whites, natality data for 1990 and 1997 were analyzed from 50 states and the District of Columbia (DC). These data indicated that, although the PTD rate was twice as high among blacks than among whites, the disparity decreased as the result of an increase in preterm births among whites and a decrease among blacks.³

U.S. natality files for 1990 and 1997 were used for this analysis. PTD was defined as a singleton, live birth occurring at 17-36 weeks' gestation. Gestational age was determined using the first day of the mother's last normal menstrual period (LMP) and the date of . . . [Full Text of this Article]

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