Table 1.

Demographics

Exposed
(n = 98)
Unexposed
(n = 101)
Rank Sum, χ2, or
ANCOVA Test
(df)
Mother
 Age (y)28.2  (4.8)22.9  (5.1) z = 7.051-165
 Parity2.6  (1.9)1.7  (1.1) z = 3.791-165
 Prenatal visits4.2  (4.3)6.9  (3.3) z = −4.91-165
 Education (y)11.9  (1.7)12.4  (1.6) z = −2.0*
Infant
 Gender (% female)57%43%χ2 = 4.5*
 Gestational age
 (weeks)
37.8  (2.2)38.8  (2.2) z = −3.3**
 5-Minute Apgar8.7  (0.7)8.7  (1.1) z = −0.13)
 Head circumference1-a
 (cm)
32.8  (0.1)33.4  (0.1) F (1,171) = 6.61-165
 Birth weight1-a (g)2863  (42)3102  (41) F (1,175) = 16.01-165
 Birth length1-a (cm)47.4  (0.2)48.7  (0.2) F (1,172) = 12.51-165
  • F1-a Gestational age covaried.

  • * P < .05;

  • ** P < .01;

  • F1-165 P < .001.