Table 1.
Logistic Regression Models Predicting Time 4 ADHD from Time 1 Variables (N = 162)
| Model
|
|||||||
|---|---|---|---|---|---|---|---|
| Single predictor a | DISC-IV only | Mother | Father | Teacher | Observer | ||
| Predictors | M (SD) | b (SE)/OR | b (SE) | b (SE) | b (SE) | b (SE) | b (SE) |
| Intercept | −2.81 (.59) | −5.88 (1.24) | −2.85 (1.04) | −5.00 (1.35) | −3.10 (.65) | ||
| DISC-IV Hyperactivity | 5.49 (2.04) | .44 (.10)/1.56*** | .32 (.12)** | .21 (.13) | .31 (.12)* | .40 (.14)** | .31 (.12)* |
| Hyperactivity impairment | 3.00 (2.34) | .35 (.08)/1.42*** | .18 (.10) | .16 (.10) | .17 (.10) | .15 (.11) | .17 (.10) |
| DISC-IV Inattention | 4.09 (2.57) | .21 (.07)/1.24** | −.04 (.10) | −.11(.11) | −.03 (.10) | −.14 (.12) | −.03 (.10) |
| Inattention impairment | 2.54 (2.53) | .26 (.07)/1.3*** | .13 (.10) | .11 (.11) | .13 (.10) | .20 (.12) | .12 (.10) |
| BASC Hyperactivity-mother | 62.63 (12.55) | .08 (.02)/1.09*** | .06 (.02)** | ||||
| BASC Attention-mother | 58.06 (13.33) | .05 (.01)/1.05*** | .01 (.02) | ||||
| BASC Hyperactivity-father | 56.00 (16.33) | .03 (.02)/1.03b | .01 (.02) | ||||
| BASC Attention-father | 58.76 (15.61) | .02 (.02)/1.02 | −.01 (.02) | ||||
| BASC Hyperactivity-teacher | 52.48 (12.39) | .03 (.01)/1.03* | .06 (.04) | ||||
| BASC Attention-teacher | 50.19 (14.86) | .02 (.02)/1.02 | −.02 (.03) | ||||
| Observed activity/inattention | .41 (.25) | 1.54 (.68)/4.69* | .91 (.75) | ||||
| Likelihood ratio X2 c | 11.30** | 2.83 | 9.04* | 1.72 | |||
| OPPd (Kappae) | .69 (.40) | .76 (.53) | .69 (.39) | .70 (.40) | .70 (.41) | ||
| OPP for boys/girls | .74/.68 | .78/.73 | .73/.71 | .76/.72 | .76/.68 | ||
| Sensitivity | .62 | .70 | .63 | .67 | .67 | ||
| Specificity | .74 | .81 | .73 | .72 | .73 | ||
| PPP (cPPPf) | .64 (.38) | .73 (.53) | .64 (.37) | .64 (.37) | .65 (.38) | ||
| NPP (cNPPf) | .73 (.36) | .78 (.49) | .73 (.35) | .74 (.40) | .75 (.41) | ||
p < .05,
p < .01,
p < .001
Single predictor models were run for each predictor variable; logistic regression models were created in which each predictor was entered alone to predict ADHD.
This coefficient was significant (b = .04, SE = .02, p < .01) when imputed data were excluded.
The likelihood ratio X2 was calculated by subtracting the deviance of the model from the deviance of the DISC-IV only model.
A cutoff of 1/(1+e−z) = .45 was used.
Kappa was calculated to indicate the OPP correcting for chance prediction.
cPPP (corrected Positive Predictive Power) and cNPP (corrected Negative Predictive Power) were calculated to correct for chance (see Frick et al., 1994).
Note. OR = Odds Ratio; OPP = Overall Predictive Power; NPP = Negative Predictive Power; PPP = Positive Predictive Power; DISC-IV = Diagnostic Interview Schedule for Children; BASC = Behavior Assessment System for Children. The 6 children with ADHD Predominantly Inattentive Type at Time 4 were not included in these analyses. Because classification statistics (e. g., OPP) were not available using the MIANALYZE procedure, predictive power was calculated separately for each imputed data set and averaged across the five data sets.