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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: J Child Psychol Psychiatry. 2014 Mar 27;55(8):935–944. doi: 10.1111/jcpp.12219

Table 1. Child and Family Characteristics.

Time 1 Data
(N=1294)
Time 2 Data
(N=884)
Current ASD Diagnosis (allowed to select more than one)

  Autism/Autistic Disorder (%) 62.9 60.4

  Asperger's Disorder (%) 22.1 23.1

  PDD-NOS (%) 24.5 25.6

Child's Gender

  Male (%) 82.2 82.8

SRS/P Total Score (SD) (N=1230) (N=852)
107.0 (27.3) 106.4 (27.3)

Chronological Age (SD) months 92.3 (32.6) 104.5 (32.6)

IQ Proxy (SD) (N=1112) (N=760)
81.3 (27.7) 83.3 (27.3)

Mother's College Education (%) (N=1286) (N=878)

  Partial High School or Lower 0.8 0.5
  High School or GED 15.5 12.7
  Associates Degree/Partial College 29.0 26.8
  Bachelor or Master Degree 50.0 54.6
  Advanced Degree such as doctorate 4.1 4.8

Annual Household Income (%) (N=1209) (N=813)

  Less than $20,000 8.3 6.8
  $20,000 to $39,999 17.2 17.1
  $40,000 to $59,999 19.3 17.1
  $60,000 to $79,999 16.9 16.6
  $80,000 to $99,999 14.3 15.4
  $100,000 or more 24.0 27.1

Race/Ethnicity (allowed more than one) (%) (N=1294) (N=884)

  African-American 5.0 5.0
  American Indian/Alaskan Native 3.5 3.4
  Asian 3.9 4.5
  Native Hawaiian/Pacific Islander 0.3 0.3
  Other 3.4 2.7
  White 93.0 93.0
  Hispanic or Latino Origin 9.9 9.2