All the ORs abstracted here from the 2 Scandinavian
studies are statistically significant, although the effect
sizes are not large. Does schizophrenia without comorbid
substance use disorder elevate the risk for aggressive
behavior? These studies indicate that this effect can be
reliably detected but leave open the question of its
importance. However, small effect sizes do become
important when the outcomes of interest include serious
bodily harm or death.