Comparison of six alcohol consumption measures from survey data.

Data were collected from a national sample of 1680 New Zealanders that allowed comparison of six different alcohol consumption measures. A measure based on reports of typical frequency and the amount typically consumed in 15 specified drinking locations produced the highest estimate of consumption. This measure and three others showed a particularly high degree of correlation, these being: a measure based on typical frequency and typical occasion amount; a variation of the Finnish period estimate; and a New Zealand variation of the period estimate that incorporated a typical frequency measure. The four measures just described, together with a last 7 days measure, showed generally consistent results when data were examined at the level of the total population and age, gender and socio-economic sub-groups. A measure based on the last two drinking occasions showed the least consistency with the other measures. The high degree of consistency found in the present study is similar to that found in a previous Finnish study and gives confidence that different ways of obtaining information about alcohol consumption, including relatively quick methods, can lead to similar conclusions about the comparative drinking of population sub-groups.