Table 1.

Selected Items from Existing Data Sets to be Integrated

Items tapping alcohol use
Data set	Variable	Item stem	Response options
Add Health	H3TO41	During the past two weeks, how many times did you have five or more drinks on a single occasion, for example, in the same evening?	(number of times)
	H3TO43	During the past 12 months, on how many days have you been drunk or very high on alcohol?	0= none 1= 1 or 2 days in the past 12 months 2= once a month or less (3 to 12 times in the past 12 months) 3= 2 or 3 days a month 4= 1 or 2 days a week 5= 3 to 5 days a week 6= every day or almost every day
CDP	DAU15EDF	Have you ever had a drink first thing in the morning to steady your nerves or get rid of a hangover?	0= no 1= yes
	DAU15RDF	In the last 30 days, have you had a drink first thing in the morning to steady your nerves or get rid of a hangover?	0= no 1= yes
GSMS	CHA3I01	How many whole drinks per week have you consumed, on average, in the past 3 months?	(number of drinks)

Items tapping associations with deviant peers
Data set	Variable	Item stem	Response options
Add Health	H3TO52	My close friends would disapprove of my binge drinking.	1= strongly agree 2= agree 3= neither agree nor disagree 4= disagree 5= strongly disagree
	H3TO104	Of your three best friends, how many binge drink at least once a month?	0= none of my friends 1= one friend 2= two friends 3= three friends
CDP	Y15A39	I hang around with kids who get in trouble	0= not true 1= somewhat or sometimes true 2= very true or often true
GSMS	CAV8I02	How many of your friends use marijuana or other drugs?	0 = None 2= A few 3= Some 4= Most 5= All

Note. Add Health = National Longitudinal Study of Adolescent Health; CDP = Child Development Project; GSMS = Great Smoky Mountains Study of Youth.