The Context of HIV Risk Among Drug Users and Their Sexual Partners

TABLE 1. Prevalence of substance use among Chicago (MACS) men, by visit [1] (in percents)
Substance:
Group A:
Cigarettes
Marijuana/Hashish
Cocaine
Crack [2]
Poppers
Group B:
MDA [3]
Hallucinogens [3]
Downers [3]
Uppers [3]
Other Substances:
Ethyl Chloride [4]
Heroin/Methadone [5]
Other Drugs
Visit Number/Year
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
1984/85 1985/86 1986/87 1987/88 1988/89 1989/90 1990/91 1991/92 1992/1993
39.4 35.7 34.0 32.2 32.9 30.1 31.0 29.5 30.2 31.3 30.9 31.7 30.4 28.4 28.6 27.5 27.8 28.7 26.8
70.2 64.6 62.6 57.4 50.7 49.9 45.7 44.1 43.7 41.6 41.2 39.9 34.0 32.2 29.6 31.8 35.0 31.8 33.2
33.9 28.8 25.3 22.2 20.9 16.6 15.2 15.3 15.3 14.4 12.9 12.2 10.3 8.3 9.4 6.5 7.5 5.5 5.5
1.5 0.9 0.6 0.6 1.7 1.2 1.2 1.6
70.6 69.0 59.3 52.9 49.0 44.5 46.2 44.1 43.3 42.5 42.4 43.4 38.7 30.2 21.1 21.6 27.9 24.7 27.1
15.5 14.6 10.4 5.6 3.9 2.4 1.7 2.1 2.5 2.0 1.0 1.0 0.9 1.1 1.5
18.2 12.9 9.6 5.5 5.2 4.1 4.3 3.0 2.5 3.3 4.2 2.5 2.9 2.2 2.3
19.4 12.3 7.9 7.9 5.2 3.3 2.7 4.1 3.7 3.1 0.8 1.5 1.6 1.5 1.3
17.6 12.9 10.4 7.2 4.9 3.3 4.3 3.8 4.1 5.3 3.0 4.4 31 3.7 2.3
5.1 4.3 3.8 2.8 2.2 2.1 2.2
1.8 1.5 1.9 1.2 0.4 0.4 0.2 0.2 0.0 0.3 0.3
1.4 2.0 1.5 2.2 3.0 1.8 0.5 1.9 1.1 1.8 1.3 2.2 1.8 0.9 1.7 6.3 6.9 6.1 5.7
Total N (by visit): 1005 925 852 824 736 704 600 531 563 604 595 592 556 543 522 524 494 491 506
[1] Cases include only those Chicago MACS respondents who subsequently entered the Coping and Change Study.
The proportions represent those respondents reporting use of each substance during the prior six-month period.
[2] Crack cocaine was included as a separate category, beginning at Visit 12.
[3] These items were dropped from the MACS questionnaire after Visit 15.
[4] This item was dropped from the MACS questionnaire after Visit 7.
[5] This item was dropped from the MACS questionnaire after Visit 11.