Moderate consumption of alcoholic beverages has been consistently reported to be associated with a lower risk of Type 2 diabetes compared to non-drinkers. Most studies have focused on the average daily alcohol intake or total amount consumed during a week. Therefore, Japanese researchers investigated the relationship between drinking patterns and the incidence of type-2 diabetes. The study population consisted of 10,631 Japanese men, age 40–55 years without type 2 diabetes at entry into the study and each participant was followed until diagnosis of type 2 diabetes or 5 years after the baseline, whichever came first.
Source: Relationship between drinking patterns and the risk of type 2 diabetes: Sato KK,Hayashi T, Harita N, et al. the Kansai Healthcare Study. J Epidemiol Community Health 2010 Dec 3.
Data on the consumption of alcoholic beverages were obtained from questionnaires, where the weekly frequency of alcohol drinking as well as the quantity per drinking day was addressed. During the follow-up period, 878 cases of type 2 diabetes were confirmed. The association between drinking patterns such as the weekly frequency and the quantity per drinking day, and the risk of type 2 diabetes was assessed and men who consumed 0.1–4.0 US standard drinks (12 g alcohol/drink) per drinking day on 4–7 days weekly had a 26 % lower risk of type 2 diabetes compared to non-drinkers.
The authors concluded that men who consumed alcoholic beverages in light to moderate amounts on 4-7 days per week, have a lower risk of type 2 diabetes compared to non-drinkers.