TABLE 3—

Gestational Age–Specific Components of the Black–White Infant Mortality Disparity: United States, 1990 and 2000

	1990				2000
	Distribution Differencea	Rate Differencea	Total Mortality Differenceb	% of Disparity	Distribution Differencea	Rate Differencea	Total Mortality Differenceb	% of Disparity
Gestational Age
< 28 weeks	480.4	−50.7	429.7	53.9	417.2	−12.7	404.5	61.8
28–31 weeks	113.3	−20.4	92.9	11.7	63.1	−6.5	56.6	8.6
32–36 weeks	102.0	5.8	107.8	13.5	48.9	11.3	60.2	9.2
37–39 weeks	10.6	92.5	103.0	12.9	−5.3	84.3	79.0	12.1
40 or 41 weeks	−42.0	86.8	44.8	5.6	−14.9	54.4	39.5	6.0
≥ 42 weeks	−7.2	25.8	18.6	2.3	−0.2	15.2	15.0	2.3
Total	657.0	139.8	796.8	100.0	508.8	146.1	654.8	100.0
All preterm	695.7	−65.3	630.4	79.1	529.2	−7.9	521.3	79.6
All term and postterm	−38.6	205.1	166.4	20.9	−20.5	153.9	133.5	20.4

Note. The infant mortality disparity is based on excess deaths per 100 000 live births.

^aExcess deaths per 100 000 live births among Black infants because of a greater gestational age–specific proportion or mortality rate among Black infants. Negative numbers indicate excess deaths among White infants because of a lower gestational age–specific proportion or mortality rate among Black infants.

^bSum of excess deaths per 100 000 live births among Black infants because of differences in the gestational age–specific proportion and mortality rate.