Key points from article :
Study of 70,000 people who had completed a survey about their health and lifestyle in 2007-2008.
People were only asked about their drinking habits and other lifestyle choices at a single time point.
Confounding factors (such as diet and exercise) may not have been recorded in enough detail to be useful.
Study did not distinguish between type 1 and type 2 diabetes (which have different causes).
The study was published in the Diabetologia journal.
