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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: J Dev Behav Pediatr. 2011 FEB-MAR;32(2):125–135. doi: 10.1097/DBP.0b013e31820839d7

Table 1.

Maternal and Infant dyads included and not included at the 3 year evaluation

Mean (SD) / Number (Percent)
Maternal Characteristics Included
(N = 290)
Excluded
(N=122)
P
Race NS
  White 109 (37.6) 51 (41.8)
  Hispanic 66 (22.8) 26 (21.3)
  Pacific Islander 51 (17.6) 20 (16.4)
  Asian 37 (12.8) 20 (16.4)
  Black 17 (5.9) 4 (3.3)
  American Indian 9 (3.1) 1 (0.8)
  Other 1 (0.3) 0 (0.0)
Household Income < $10,000 71 (26.2) 35 (32.4) NS
Hollingshead SES V 61 (21.0) 32 (26.7) NS
Public Insurance 229 (81.5) 106 (86.9) NS
No Partner 161 (55.5) 66 (54.1) NS
Education <12 years 117 (40.3) 55 (45.8) NS
Age, yr 25.2 (5.6) 25.1 (5.5) NS
Gestational Age at 1st Prenatal Visit, wk 11.3 (7.1) 13.7 (7.8) <.01
Weight Gain during this pregnancy, lbs 42.1 (20.1) 34.1 (15.8) NS
Prenatal Tobacco Exposure 148 (51.0) 70 (57.4) NS
Prenatal Alcohol Exposure 71 (24.5) 35 (28.7) NS
Prenatal Marijuana Exposure 56 (19.3) 20 (16.4%) NS
Infant Characteristics
Gestational age, wk 38.6 (2.2) 38.7 (1.8) NS
Birth weight, g 3262.9 (618.9) 3210.8 (549.5) NS
Length, cm 50.6 (3.5) 50.1 (2.8) NS
Head circumference, cm 33.9 (1.9) 33.9 (1.7) NS
Low Birth weight, <2500 g 34 (11.7%) 13 (10.7%) NS
Apgar 1 minute 7.8 (1.3) 8.0 (0.9) NS
Apgar 5 minute 8.8 (0.5) 8.9 (0.3) NS
Male, % 153 (52.8%) 67 (54.9%) NS