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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Pediatrics. 2009 Oct 12;124(5):1355–1362. doi: 10.1542/peds.2008-2898

Table 2.

Characteristics of Mothers Included and Excluded from the Study by Cocaine Exposure

Cocaine Exposed Comparison

Included (n = 360) Excluded (n = 183) p Included (n = 480) Excluded (n = 250) p
Race: African American 299 (83.1%) 136 (74.3%) .016 381 (79.4%) 189 (75.6%) .242
Age: 26–36 yr 255 (70.8%) 111 (60.7%) .017 204 (42.5%) 90 (36.0%) .089
Marital Status: Single 326 (90.8%) 158 (86.3%) .111 356 (74.2%) 185 (74.3%) .970
Insurance: Medicaid 313 (86.9%) 158 (86.3%) .844 374 (77.9%) 193 (77.2%) .825
Education: < High School 181 (50.3%) 92 (50.3%) .999 155 (32.4%) 72 (28.8%) .325
Hollingshead SES: Low-V 93 (27.6%) 50 (29.2%) .697 109 (22.9%) 37 (15.2%) .015
Prenatal Drug use
 Alcohol 274 (76.1%) 135 (73.8%) .550 234 (48.8%) 128 (51.2%) .530
 Tobacco 293 (81.4%) 157 (85.8%) .198 143 (29.8%) 68 (27.2%) .464
 Marijuana 143 (39.7%) 82 (44.8%) .255 45 (9.4%) 26 (10.4%) .657