Fitzgerald J L, Mulford H A
J Stud Alcohol. 1982 Nov;43(11):1171-89. doi: 10.15288/jsa.1982.43.1171.
Survey data reveal that an increase in per-capita alcohol consumption in Iowa from 1961 to 1979 is attributable mainly to an increase in the prevalence of drinkers and less so to an increase in the frequency of drinking occasions, and that there was little change in the quantity per drinking occasion. The extent, the direction and the sources of the consumption changes, however, varied widely across sociodemographic subpopulations.
调查数据显示，1961年至1979年期间，爱荷华州人均酒精消费量的增加主要归因于饮酒者患病率的上升，而较少归因于饮酒场合频率的增加，并且每次饮酒场合的饮酒量变化不大。然而，消费变化的程度、方向和来源在社会人口亚群体中差异很大。
