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. Author manuscript; available in PMC: 2015 Jun 4.
Published in final edited form as: J Autism Dev Disord. 2012 Oct;42(10):2121–2140. doi: 10.1007/s10803-012-1461-8

Table 1.

Population characteristics of the Study to Explore Early Development catchment areas

California Colorado Georgia Maryland North Carolina Pennsylvania
Catchment Area 2 Counties, San Francisco Bay Area 7 Counties, Denver 5 Counties, metropolitan Atlanta 7Jurisdictions, northeast Maryland 10 Counties, central North Caroline 3 Counties, Philadelphia
Live births/yr (N) (2005) 47,454 40,253 53,276 35,037 36,964 36,663
Maternal race/ethnicity (%)
Black/African 6.7 5.9 38.2 35.7 23.2 32.3
American
White 59.1 89.0 55.1 61.5 71.4 49.3
 Non-Hispanic 25.6 55.5 32.3 56.2 53.6 46.1
 Hispanic 33.5 33.5 22.7 5.3 17.8 2.9
Asian 16.6 4.5 6.2 5.1 4.7 6.3
Mixed/Other 14.5 0.6 0.1 0.0 0.7 9.3
Unknown 3.1 0.0 0.5 0.0 0.0 2.8
Non-Hispanic 65.8 65.9 70.5 94.3 82.0 85.6
Hispanic 34.2 34.1 22.7 5.7 18.0 12.9
Maternal education
< 12 years 20.0 22.9 22.0 14.5 23.2 19.2
 12 years 20.6 24.5 27.3 27.1 22.0 25.4
>12 and < 16 years 18.1 15.1 18.4 18.8 18.4 23.0
>= 16 years 41.3 34.9 32.3 38.6 36.1 31.2
Proportion of children under 18 years living in poverty (%) 12.2 (2005–07) 15.7 (2005) 17.6 (2005–07) 14.9 (2005) 20.1 (2005) 22.1 (2005–07)