No.	Name of Lifestyle	Third Class	Second Class	First Class	Type	No. of Studies
21	Duration of Alcohol consumption	NA	Alcohol	Habits+behaviors	Risk factor	1
22	Duration of drinking	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
23	Ever abstained from drinking	NA	Alcohol	Habits+behaviors	Risk factor	1
24	Ever drank alcohol	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
25	Ever had a period of heavy drinking	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
26	Ex-drinkers	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
27	Frequency of drinks	NA	Alcohol	Habits+behaviors	Risk factor No statistical significance factor	1
28	Frequency of Liquor	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
29	Frequency of Red Beer	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
30	Frequency of Red wine	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
31	Frequency of White wine drinks	NA	Alcohol	Habits+behaviors	Risk factor No statistical significance factor	1
32	Heavy Alcohol	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
33	Lifetime alcohol intake	NA	Alcohol	Habits+behaviors	Risk factor No statistical significance factor	1
34	Lifetime beer	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
35	Lifetime dose of alcohol intake	NA	Alcohol	Habits+behaviors	Risk factor No statistical significance factor	1
36	Lifetime duration of alcohol	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
37	Lifetime intake of alcohol	NA	Alcohol	Habits+behaviors	No statistical significance factor	1
38	Lifetime wine	NA	Alcohol	Habits+behaviors	Protective factor No statistical significance factor	1
39	Liquor	NA	Alcohol	Habits+behaviors	Risk factor No statistical significance factor	9
40	No. of Cigarettes Smoked	NA	Alcohol	Habits+behaviors	Protective factor No statistical significance factor	6