The interactive effect of conduct problems and obesity on P300a latency (CP × OB: Anterior region: F1,208 = 7.4, p < .007; Posterior region: F1,208 = 6.7, p < .01) is the most intriguing of all of the results. Table 2 shows, and Tukey post hoc tests confirm, that significant increases in anterior and posterior region P300a latencies were only present in CP+ subjects who were also obese. In other words, neither obesity nor conduct problems alone were sufficient to cause impairments in frontal brain function. The combination was critical.
