TABLE 1—

Birthweight-Specific Infant Deaths and Mortality Rates Among Singleton Infants at ‡20 Weeks’ Gestation, by Race: United States, 1989–1991 and 1998–2000

		White			AIAN
Perioda	Birthweight range, gb	No.	Rate	% Change in Ratec	No.	Rate	% Change in Ratec
1989–1991
	500–999	11 625	443.4		191	515.0
	1000–1499	4202	113.0		79	160.2
	1500–2499	9447	25.6		199	37.3
	2500–4499	27 923	3.2		780	6.3
	4500–7999	461	2.4		17	. . .
1998–2000
	500–999	9331	320.8	–28d	169	343.6	–33d
	1000–1499	2606	67.6	–40d	54	90.7	–43d
	1500–2499	6901	18.4	–28d	126	22.4e	–40d
	2500–4499	18 707	2.2	–31d	494	4.6e	–27d
	4500–7999	280	1.8	–25d	27	9.2e

Note.AIAN = American Indians/Alaska Natives; . . . = fewer than 20 deaths in the numerator and estimate is considered unreliable.

^aData are from the Centers for Disease Control and Prevention, National Center for Health Statistics linked birth/infant death file.

^bBirthweight-specific infant mortality rates per 1000 live births were adjusted by gestational age using the 1998–2000 distribution for total births.

^cPercentage change in rate from 1989–1991 to 1998–2000, by race.

^dSignificant change in rates from 1989–1991 to 1998–2000 from z-test using NCHS methods.

^eSignificant difference between AIAN and White infants in 1998–2000 rates from z-test using NCHS methods.