More specifically, Abramowitz et al. (2004) found that conduct problems, as well as ADHD, were important predictors of the behavioral dimension of psychopathy in adults. (link.springer.com)
Callous - unemotional traits and conduct problems: A two - factor model of psychopathy in children (cambridge.org)
But, as with psychopathy, there are degrees of sadism and most of them stop well short of the Marquis for whom the term is named. (inc.com)