TABLE 1

Sociodemographic and Pregnancy Characteristics of Births in California in 2006 by Diagnosed Prenatal Substance Exposure

Birth Cohort (N = 474 071)χ2 Test
All BirthsNo Substance (n = 466 643; 98.4%)Substance (n = 7428; 1.6%)
Nn%n%
Race or ethnicity
 Black30 88529 6166.3126917.1P < .001
 Hispanic290 947287 94861.7299940.4
 White152 239149 07931.9316042.5
Age at childbirth
 ≤19 y50 12349 27810.685411.5P < .001
 20–24 y116 326114 06124.4226530.5
 25–29 y126 344124 25526.6208928.1
 30+ y181 254179 03738.4221729.9
Insurance type
 Private226 153224 17548.1197827.0P < .001
 Public247 034241 67351.9536173.0
Paternity
 Established426 705422 29190.5441459.4P < .001
 Missing47 36644 3529.5301440.6
Prenatal care
 1st tri403 072398 59785.5411555.4P < .001
 2nd tri54 00052 23611.2176423.7
 3rd tri10 42198812.15407.3
 No care /missing657855691.2100913.6
Parity
 First birth179 543177 22838.0231531.2P < .001
 Non–first birth294 528289 41562.0511368.8
Infant birth wt
 Normal (≥2500 g)442 514436 33893.5617683.1P < .001
 Low (<2500 g)31 55730 3056.5125216.9
  • Tri, trimester.