Here’s some detailed and reliable data about the relationship between parents who drink and how it affects the likelihood of the children being drinkers as well.

You can download the full PDF document here:
http://www.phc.bris.ac.uk/phcdb/pubpdf/pubs/365.pdf

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Alcohol consumption by adolescents of parents with and without
alcohol problems
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                     Parental alcohol             No Parental              
                         problems                alcohol problems
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Usually drink 2
times a week
or more                        22.8%                   16.5%
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Was a little drunk
In past 3 months                67.5                    61.2
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Was seriously drunk
In past 3 months                44.0                    35.7
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Will drink in
next 2 weeks                    54.1                    51.1
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Will get little
bit drunk in
next 2 weeks                    36.0                    30.1
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Will get seriously
drunk in next
2 weeks                         18.2                    11.1
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Usually drink
with friends                    65.0                    58.7
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Usually drink
with relatives                  59.2                    64.1
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Usually drink with
girlfriend/boyfriend            18.5                    14.5
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Usually drink alone              9.2                     5.1
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Drink to get a
little bit drunk                30.5                    33.7
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Drink to get
seriously drunk                 21.1                    12.0
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Drink to forget my problems     15.8                     6.4
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Drink because
like the taste                  32.6                    47.9
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