Table 1.
Outcome description in the study samples from the participating studies.
| Study | Country | Test | Age of assessment (y) | Evaluator | Cases [ (%)] | Non-cases () | Years of cohort enrollment |
|---|---|---|---|---|---|---|---|
| INUENDO-Greenland | Greenland | SDQ | 7–8 | Parents | 31 (6.0) | 487 | 2002–2004 |
| INUENDO-Ukraine | Ukraine | SDQ | 7–8 | Parents | 26 (5.4) | 459 | 2002–2004 |
| PCB cohort | Slovakia | CBCL-ADHD | 4 | Parents | 10 (5.4) | 175 | 2000–2002 |
| HUMIS | Norway | NPR | 10 | Medical doctor | 23 (2.3) | 966 | 2002–2009 |
| DNBC | Denmark | SDQ | 7 | Parents | 42 (4.6) | 872 | 1996–2002 |
| FETOTOXa | Denmark | DNHR, DPCR | 11 | Medical doctor | 215 (28.3) | 544 | 1996–2002 |
| INMA-Valencia | Spain | ADHD-DSM-IV | 4–5 | Teachers | 27 (7.3) | 344 | 2004–2005 |
| INMA-Sabadell | Spain | ADHD-DSM-IV | 4–5 | Teachers | 18 (4.8) | 360 | 2004–2007 |
| INMA-Gipuzkoa | Spain | ADHD-DSM-IV | 4–5 | Teachers | 7 (3.1) | 220 | 2006–2008 |
Note: ADHD-DSM-IV, ADHD Criteria of Diagnostic and Statistical Manual of Mental Disorders, 4th ed.; CBC-ADHD, attention syndrome scale of the Child Behavior Checklist; DNBC, Danish National Birth Cohort; DNHR, Danish National Hospital Registry; DPCR, Danish Psychiatric Central Registry; HUMIS, Norwegian Human Milk Study; INMA, Infancia y Medio Ambiente; NPR, Norwegian patient register; PCB, polychorinated biphenyl; SDQ, Strengths and Difficulties Questionnaire.
a
Observations in FETOTOX were selected using case–cohort sampling.