We extended these analyses to test whether prediction from ODD to CD in boys was affected by levels of sub-threshold CD symptoms. Confining the analysis to boys without CD at Wave 1, CD symptoms were significant additional predictors of a later CD diagnosis (OR for a 1 symptom increase: 3.0, 95% CI: 1.8, 4.9, p<.001). Despite these effects, however, ODD remained independently associated with increased risk of later CD (OR=5.7, 95% CI: 2.1, 15.2; p=.001).
