Interpretation of interactions: guide for the perplexed.
In this issue, Zammit et al explore how five dichotomised risk factors work together to predict risk for non-affective psychosis in a large Swedish cohort. In this editorial, we review these findings, and comment on both the nature of additive v. multiplicative models and the meaning of statistical interactions.
Kendler
Kenneth S
KS
Gardner
Charles O
CO
D003627:Data Interpretation, Statistical; D006801:Humans; D015233:Models, Statistical; D011618:Psychotic Disorders / Q000453:epidemiology*; D012307:Risk Factors