Table 2 Data on cocaine and alcohol use

 Age at the time of first use, yrs

22.8 ± 6.9

22.0 ± 6.9

 Time between last use and CMR (days)

72 ± 63

73 ± 79

 Frequency of use in the last month of consumption (number of uses)

3.1 ± 1.7

3.4 ± 1.8

 Frequency of use in the last 3 months of consumption (uses per month)

3.7 ± 1.6

3.9 ± 1.4

 Maximum frequency of use in lifetime (uses per month)

7.3 ± 1.5

7.5 ± 1.5

 Amount of consumption in the last month of consumption (g)

3.7 ± 1.7

4.1 ± 1.3

 Years of regular cocaine use (yrs)

13.8 ± 13

14.2 ± 8

 Nasal insufflation

82%

81%

 Smoked

15%

15%

 Intravenous

3%

4%

 Subjects with alcohol abuse/dependence, n (%)

32 (52%)

17 (53%)

 Years of alcohol use

9.7 ± 11.2

10.6 ± 11.5

 Amount of consumption in the past month (g)

101 ± 138

73 ± 142