Table 1

Demographic statistics by drug type.

Group

N

Age

Female

African-American

Education


Never smoker

341

58

64%

30%

12.9

Former smoker

429

59

60%

30%

12.6

Current smoker

318

52

62%

45%

11.9

Marijuana: never-user

576

62

69%

30%

12.1

Marijuana: former-user

380

50

53%

37%

13.0

Marijuana: current-user

88

48

44%

47%

12.4

Cocaine/heroin: never-user

887

59

65%

32%

12.4

Cocaine/heroin: former-user

178

48

46%

39%

12.9

Cocaine/heroin: current-user

29

46

48%

59%

11.9

Total

1102

57

62%

34%

12.5


Note. Mean age and education expressed in years. For age, ethnicity, and education there were significant differences between never, former, and current users of cigarettes, marijuana, and cocaine/heroin. Sex differences were seen for marijuana and cocaine/heroin users, but not for cigarette smoking.

Terracciano et al. BMC Psychiatry 2008 8:22   doi:10.1186/1471-244X-8-22

Open Data