Prediction of differential adult health burden by conduct problem subtypes in males.
Level 3 - non-randomized controlled study
Prospective longitudinal birth cohort study
PubMed 17404124 · doi:10.1001/archpsyc.64.4.476
What was done
Researchers evaluated 526 male participants from the Dunedin Multidisciplinary Health and Development Study, a longitudinal birth cohort born between April 1972 and March 1973. Developmental trajectories were identified using prospective ratings of conduct problems assessed at ages 7, 9, 11, 13, 15, 18, 21, and 26 via general growth mixture modeling. At age 32, adult health burden was assessed as physical and mental health problems using diagnostic interviews and physical examinations.
What was found
Growth mixture modeling identified 4 developmental subtypes: childhood-onset/life-course-persistent, adolescent-onset, childhood-limited, and low. By age 32, study members with the life-course-persistent subtype experienced the worst health burden, followed to a lesser extent by those with the adolescent-onset subtype. The childhood-limited subtype had adult health outcomes within the range of the cohort norm. No specific numerical values or effect sizes were reported in the abstract.
Why it matters
The findings support the epidemiological validity of DSM conduct disorder distinctions based on age of onset while demonstrating that long-term persistence is a key determinant of adult health outcomes. Intervening early in persistent conduct problems could potentially mitigate long-term adult morbidity.
Limits
The abstract reports no numerical estimates, effect sizes, or confidence intervals. The sample is restricted to males from a single New Zealand birth cohort, limiting generalizability to females and other geographical or socioeconomic settings. As an observational cohort study, residual confounding cannot be excluded.
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