Drinking trajectories of at-risk groups: Does the theory of the collectivity of drinking apply?

Alcohol consumption among Swedish youth has declined in five groups that were delineated based on their relative ranking on a risk factor index. The findings are consistent with Skog's theory of the collectivity of drinking behaviour. [Norström T, Raninen J. Drinking trajectories of at-risk groups: Does the theory of the collectivity of drinking apply?.