“…The two groups were also compared on the average ratings (on a 0–8 scales, with 0 = unimportant to 8= very important) applied to the excerpts of the QIS on the 9 main topics coded for SU, and only 1 of the 7 (seeing others go “down wrong path”) showed a significant difference (ADHD = 4.99 vs LNCG = 3.85, t(72) = 2.68, p < 0.006). 2 Swanson et al (in press) described the origins of the QIS sample based on initial recruitment of ADHD (n = 576) and LNCG (n = 289) cases, retention into adulthood of the ADHD (n= 476) and LNCG (n = 267), and participation of the 4 sites of ADHD (n = 325) and LNCG (n = 159) cases. The 4 subgroups defined by Diagnosis in childhood and Persistence of substance use were compared on 5 demographic variables related to substance use (sex, and household education, social-economic, public assistance, and race/ethnicity status) with no clear evidence of confounding, and were compared on perceived frequency and reasons given in the interview for use and non-use of substances. 3 Jensen et al (in press) described additional qualitative classification procedures that yielded a total of 67 SU persisters (50 ADHD, 17 LNCG), 58 SU desisters (39 ADHD, 19 LNCG; this sample was narrowed to 33 of the 58 on the basis of heavier use [two previous assessments documenting ongoing SU] and a subsequent ≥ four years of ongoing abstinence), 32 Abstainers (18 ADHD, 14 LNCG), 16 SU Late Starters (9 ADHD, 7 LNCG), and 10 SU Resumes (9 ADHD, 1 LNCG). From these qualitative classification procedures, 10 ADHD and 10 LNCG participants were randomly selected from the SU Persister group, the SU Desister group, and the Abstainer group (male to female ratio of 4:1) to yield a final sample of 60 participants.…”