Table 5.
Distributions and associations (Odds-Ratios) of scores on the composite risk index with current DSM-IV adult ADHD among respondents who met criteria for ADHD in childhood pooled across the ten surveys (n = 629)
| Current ADHD among childhood cases |
||||||||
|---|---|---|---|---|---|---|---|---|
| Distributon1 | Prevalence2 | Conditional distribution3 | ||||||
| % | (SE)4 | % | (SE)4 | % | (SE)4 | OR5 | (95% CI)5 | |
| I. Composite risk index | ||||||||
| 0 | 16.2 | (2.1) | 21.2 | (5.7) | 6.9 | (1.7) | 1.0 | -- |
| 1-2 | 41.7 | (2.8) | 46.0 | (5.3) | 38.5 | (4.2) | 3.5* | (1.6-7.6) |
| 3-6 | 32.1 | (2.7) | 58.6 | (9.5) | 37.6 | (4.2) | 8.3* | (2.9-23.8) |
| 7+ | 9.9 | (1.7) | 85.7 | (5.1) | 17.1 | (3.2) | 23.8* | (7.6-74.4) |
| χ236 | 32.8* | |||||||
| AUC = .76 | ||||||||
Significant at the .05 level, two-sided test
Distribution: The conditional prevalence of scores on the risk index among respondents with a history of childhood ADHD
Prevalence: The conditional prevalence of current adult ADHD among respondents with a history of childhood ADHD in sub-samples defined by the level of the risk index in the row
Conditional distribution: The proportion of all respondents with adult ADHD who have scores at each level of the risk index
SE: Standard error of the prevalence estimate
OR: Odds-ratio; CI: Confidence interval. The ORs are based on a single logistic regression equation that controlled for country in the sub-sample of respondents with a history of childhood ADHD to predict current adult ADHD.
The 3 degree of freedom χ2 evaluates the joint significance of the three coefficients for level on the composite risk index in predicting adult persistence of ADHD.