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Table 2 Data on cocaine and alcohol use

From: Long term effects of cocaine on the heart assessed by cardiovascular magnetic resonance at 3T

Cocaine Age at the time of first use, yrs 22.7 ± 6.7
  Time between last use and CMR, days 53 ± 40
  Frequency of use in the past (number of uses) 3.2 ± 1.8
  Frequency of use in the past 3 months (uses per month) 3.8 ± 1.6
  Maximum frequency of use in lifetime (uses per month) 7.5 ± 1.5
  Amount of consumption in the past month (g) 3.8 ± 1.6
  Years of regular cocaine use (yrs) 13.9 ± 9
  Route of administration  
     Nasal insufflation 81%
     Smoked 16%
     Intravenous 3%
Alcohol Subjects with alcohol abuse or dependence, n (%) 49 (51%)
  Age at the time of first use, yrs 16 ± 4
  Time between last use and CMR (days) 120 ± 237
  Frequency of use in the past month (number of uses) 2.7 ± 2.3
  Frequency of use in the past 3 months (uses per month) 2.8 ± 2.3
  Amount of use in the past month (gr) 120 ± 170
  Years of alcohol use 20 ± 7 yrs