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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: J Pediatr. 2010 Apr 18;157(2):288–295.e1. doi: 10.1016/j.jpeds.2010.02.039

TABLE 1.

Maternal and child characteristics of the exposed subjects and the comparison cohort. Values are expressed as percent or mean (SD) where indicated.

Variables Exposed
N=320
Comparison
N= 423
P value
Race: Black 267 (83.4) 342 (80.9) 0.364
Maternal Age: Mean (SD) 30.4 (4.7) 26.8 (5.7) <0.001
Marital status: Single 293 (91.6) 329 (77.8) <0.001
Low SES (Hollingshead level 5) 90 (29.6) 85 (20.2) 0.004
Medicaid 282 (88.1) 325 (76.8) <0.001
Education < 12years 159 (49.7) 134 (31.7) <0.001
Prenatal alcohol use 241 (75.3) 225 (53.2) <0.001
Prenatal tobacco use 262 (81.9) 119 (28.1) <0.001
Prenatal marijuana use 127 (39.7) 40 (9.5) <0.001
Child’s Sex: male 168 (52.5) 215 (50.8) 0.652
Child’s Gestational Age, wk, Mean(SD) 36.1 (4.0) 36.3 (4.1) 0.284
Child’s Birth Weight, g, Mean(SD) 2560 (740) 2683 (865) 0.008
Child’s Head Circumference, cm,
Mean(SD)
32.0 (2.8) 32.2 (3.1) 0.100
Child’s Birth Length, cm, Mean(SD) 46.4 (4.7) 47.0 (5.2) 0.024