This file contains 978 records with cointinous data from the Ille-et-Vilaine
study of esophageal cancer and alcohol/tobacco consumption.  See Breslow
and Day (1980) Appendix I for grouped data from this study.  The records
are coded as follows:

Cols          Var          Range/Description
----------------------------------------------------------------------------
 1- 2        Case          0 = Control
                           1 = Case

 3- 5        Age           Age at diagnosis

 6- 7        Age           1 = 25 - 34 years
             Group         2 = 35 - 44 
                           3 = 45 - 54
                           4 = 55 - 64
                           5 = 65 - 74
                           6 = 75+

 8- 9        Tobacco       0 = None
             Group         1 =  1- 4 grams per day
                           2 =  5- 9
                           3 = 10-14
                           4 = 15-19
                           5 = 20-29
                           6 = 30-39
                           7 = 40-49
                           8 = 50+
                           9 = Unknown amount (treated as unknown)

10-17        Tobacco       0, 2.5, 7.5, 12.5, 15, 25, 35, 45, and 
             Amount        60 grams per day corresponding to above
                           groups (99 = unknown amount)

18-25        Log(tob+1)    Transform of above variable; 99 = unknown

26-29        Beer          Beer in grams per day

30-33        Wine          Wine in grams per day
 
34-37        Cider         Cider in grams per day

38-41        Aperitif      Aperitif in grams per day

42-45        Digestive     Digestive in grams per day

46-49        Total         Total alcohol in grams per day
             Alcohol

50-57        Log(alc+1)    Transform of above variable
-----------------------------------------------------------------------------
Notes:

1) The three controls with unknown tobacco amount or age under 25
   were deleted for the Chapter 6 analyses.

2) The grouped data in Appendix I do not agree exactly with these
   continuous data as regards the alcohol and tobacco groups, due
   to a programming error made in the 1970's.