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Table 1 Range of the percentage of demographic characteristics among the counties in EARLI Study field site areasa

From: Infant siblings and the investigation of autism risk factors

  County Low and High Percentages within Field Site Catchment Areas
Characteristics SE Pennsylvania (13 counties in PA, NJ, DE) NE Maryland (9 counties in MD) N. California (25 counties in CA)
White 41.0% to 89.2% 19.2% to 92.9% 43.0% to 91.4%
Black or African-American 3.6% to 43.4% 3.2% to 64.5% 0.4% to 14.7%
Asian 0.8% to 8.9% 1.1% to 14.4% 1.1% to 33.3%
Hispanic or Latino 3.0% to 18.8% 2.6% to 17.0% 8.5% to 55.4%
Language other than English spoken at home (5 years or older)b 7.4% to 24.8% 5.2% to 35.8% 6.5% to 51.2%
Families below povertyc 4.2% to 22.9% 4.5% to 22.9% 7.2% to 24.6%
25+ years old with educational attainment 9th to 12th grade, no diploma 7.8% to 28.8% 5.7% to 31.6% 6.6% to 33.0%
  1. aData are derived from the 2010 US census. b2005 to 2009 for all counties; 2000 for Philadelphia City and Baltimore City. c2009 for all counties; 1999 for Philadelphia City and Baltimore City. EARLI, Early Autism Risk Longitudinal Investigation.