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Our work assessed attention in MLBW and VLBW groups of preterm children, compared with a group of full-term children, and it also combined the assessment of sustained attention with assessment of other skills.
Percentage * of live births, by infant characteristics--Delaware, 1994-2000 1994-1996 1998-2000 Characteristic (n = 30,802) (n = 32,286) Birthweight VLBW ([dagger]) (<1,500 g) 1.7 1.9 MLBW ([section]) (1,500 g-2,499 g) 6.5 6.7 Normal ([greater than or equal to] 2,500 g) 91.8 91.4 Plurality Singletons 97.1 96.5 Twins 2.8 3.3 Triplets-plus 0.2 0.2 Gestational age (wks) <28 0.9 1.0 28-36 10.5 11.7 [greater than or equal to] 37 88.6 87.2 * Percentages might not add to 100% because of rounding.
For the mailed questionnaire a stratified, random sampling method was used to select a similar number of MLBW and NBW controls stratifying race (black, not black), maternal age (10 to 19, 20 to 24, and 25 plus), and urban or nonurban residency.
The study population consisted of 450 maternal surveys for fetal deaths, 779 singletons for VLBW cases, 799 singleton MLBW controls, and 800 singleton controls for mothers having NBW infants, a total of 2,828 surveys.
During 1983-1999, BWSMRs for LBW declined 36.9% for all races (46.7% for MLBW and 38.3% for VLBW).
American Indian mothers had nearly 50% greater IMRs for MLBW infants than did white mothers, whereas Japanese, Filipino, and Cuban mothers had rates approximately 40% lower.
Blacks and Puerto Ricans had a higher incidence of VLBW and MLBW than non-hispanic whites.
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