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Table 1 Comparison of characteristics for participants age 8-15 years not included and included in sample

From: Association of pyrethroid pesticide exposure with attention-deficit/hyperactivity disorder in a nationally representative sample of U.S. children

  Not Included Included
Characteristic N with Characteristica %a Overall Na N with Characteristica %a Overall Na
Age 8-11 years 490 46.8 1341 307 46.5 687
Male gender 661 51.3 1341 323 52.9 687
Race/ethnicity       
  African American 451 15.4 1341 210 13.0 687
  Mexican American 386 11.0 1341 205 11.1 687
  Other race/ethnicity 111 14.2 1341 56 12.5 687
White, non-Hispanic 393 59.4 1341 216 63.4 687
Caregiver report of ADHD 96 9.7 1139 66 10.8 684
DSM-IV Defined ADHD 75 9.9 966 55 9.6 667
ADHD by DSM-IV Criteria and/or Caregiver report 137 17.8 980 93 14.6 687
Poverty-Income Ratio       
  <1.00 370 20.9 1260 203 20.7 664
  1.00-1.85 318 22.7 1260 155 20.2 664
  >1.85-3.00 231 20.0 1260 125 22.0 664
  >3.00 341 36.4 1260 181 37.1 664
Reported health insurance 1109 88.0 1325 564 83.6 681
Reported prenatal tobacco exposure 203 17.2 1325 92 18.1 677
Birth weight <2.5 kg 130 8.2 1322 50 5.9 682
Reported current household tobacco smoke exposure 298 23.2 1326 145 22.7 683
Urinary 3-PBA < LOD 29 23.2 148 131 21.2 687
  1. Abbreviations: ADHD, Attention-Deficit/Hyperactivity Disorder; DSM-IV, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition; SE, standard error; LOD, limit of detection; 3-PBA, 3-phenoxybenzoic acid
  2. aN reflects actual sample size, % is weighted to reflect national prevalence estimates