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Drug Alcohol Rev. 2014 Jul;33(4):385-92. doi: 10.1111/dar.12148. Epub 2014 May 6.

When yesterday's consumption strikes back: deviation from usual consumption inversely predicts amounts consumed the next weekend evening.

Author information

1
Research Department of Addiction Switzerland, Research Institute, Lausanne, Switzerland.

Abstract

INTRODUCTION AND AIMS:

Young adults' weekend alcohol consumption is characterised by heavy episodic drinking (HED) with low alcohol use in between. This study investigates whether consuming a lower or higher number of drinks than usual on a given evening predicts consumption the following evening.

DESIGN AND METHODS:

In French-speaking Switzerland, 115 young adults (57% female, mean age = 23.2) answered questionnaires on their cellphones six times every Thursday, Friday and Saturday evening over five consecutive weeks. Multilevel models with group-mean centering were used to analyse 462 evening pairs.

RESULTS:

Although the sample average number of drinks consumed tended to increase from Thursday [Mmen (SD) = 3.6 (5.0); Mwomen (SD) = 2.9(4.2)] to Saturday [Mmen (SD) = 7.4( 7.1); Mwomen (SD) = 5.2(5.6)], substantial day-to-day variations were observed within individuals. Variations from the usual consumption (i.e. higher or lower number of drinks than usual) on the first day had a significant inverse impact on amounts consumed the following day (unstandardised regression coefficient (B) = -0.27, P < 0.01). This effect was more marked for evening pairs including HED (B = -0.44, P < 0.001). Men and heavy drinkers were less subject to day-to-day variations than women and usually moderate drinkers.

DISCUSSION AND CONCLUSIONS:

The inverse relationship might result from adverse consequences experienced after HED or an intentional reduction in alcohol consumption in anticipation of a heavy drinking session the next day. Event-specific prevention is needed for women and usually light or moderate drinkers as their more distinct consumption peaks put them at greater risk, particularly of accidents and injuries.

KEYWORDS:

cellphone; group-mean centering; heavy episodic drinking; preventive measure; young adult

PMID:
24802354
DOI:
10.1111/dar.12148
[Indexed for MEDLINE]

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