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. Author manuscript; available in PMC: 2008 Jun 1.
Published in final edited form as: Prev Med. 2007 Mar 1;44(6):471–476. doi: 10.1016/j.ypmed.2007.02.018

Table 2.

Sources of alcohol over time for entire sample of alcohol users and sub-sample of consistent alcohol users.

Source Fall 2002 (6th grade) Spring 2003 (6th grade) Spring 2004 (7th grade) Spring 2005 (8th grade)
Alcohol Users

 Na (578) (825) (978) (1328)
Parents/guardian (%) 32.7 30.6 24.4 18.9
Friend’s parent or guardian (%) 4.1 3.0 4.0 4.5
Another adult over 21 (%) 15.7 17.1 16.8 22.7
Someone under 21 (%) 9.7 12.2 18.4 16.4
Took it from home (%) 3.6 6.7 9.2 8.9
Took from friend’s house (%) 2.6 3.0 4.0 6.2
Commercial source (%) 2.4 2.6 3.2 5.6

Consistent Users

 Nb (217) (321) (329) (327)
Parents/guardian (%) 38.0 34.6 23.4 18.7
Friend’s parent or guardian (%) 4.6 3.4 4.0 2.7
Another adult over 21 (%) 16.1 17.1 16.1 25.1
Someone under 21 (%) 8.8 13.1 23.7 17.3
Took it from home (%) 2.8 8.1 12.1 11.9
Took from friend’s house (%) 2.3 3.7 3.7 4.6
Commercial sourcec (%) 2.8 1.9 3.3 6.7

Source: Project Northland Chicago, Chicago, Illinois, 2002–2005

a

Sample size increases over time because alcohol use (past year) increases with age.

b

Sample size generally increases over time because the sub-sample includes those who reporting drinking three out of four time periods rather than all four.

c

Bar, liquor store, convenience store, gas station, grocery store