Wrecker, what i think you are really looking for is a study that compares life expectancy of "moderate drinking vs total abstinence"
there are three main problems here. 1. what is "moderate"? 2. not all people are the same wrt to alcohol and 3. what form of alcohol (wine, beer, spirits etc)
I don't think you will find such a definitive and scientific study with usable conclusions
common sense should dictate that there would be little difference between (genuine) moderation and abstinence to worry about
moderate alcohol, a healthy diet and good exercise should be good enough. nature, luck and your genes will decide the rest
DrDc