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Table 3 Final study analytic samples

From: Assessment of demographic and perinatal predictors of non-response and impact of non-response on measures of association in a population-based case control study: findings from the Georgia Study to Explore Early Development

ASD POP
Likely ASD sample Likely POP sample
 N = 274
  All children initially identified as presumptive ASD based on previous diagnosis of ASD—data from the subset who completed the study suggest an 84% likelihood of final classification ASD if non-responders/non-completers had enrolled and completed the study.
 N = 2599
  Children identified as presumptive POP from random sample of birth certificates minus the 9 children who had a positive autism screen at enrollment
 N = 148
  Children initially identified as potential DD or POP who were enrolled and had a positive autism screen—data from the subset who completed the study suggest a 51% likelihood of final classification ASD if non-completers had completed the study.
 
Total N = 422 N = 2599
Final, complete ASD sample Final, complete POP sample
N = 118 N = 159