TABLE III.
Cocaine Use Characteristics, Cocaine-Related Effects, and Cocaine Treatment History by Group [N (%)]
| Behaviors | Group 2 1,241 (12.5) |
Group 3 180 (1.81) |
Group 4 3,258 (32.7) |
Group 5 1,916 (19.2) |
χ2 (df=3) |
|---|---|---|---|---|---|
| Mean [SD] age of first cocaine use in year | 21.1 (5.7) | 36.5 (11.8) | 21.4 (5.2) | 17.9 (4.3) | 1,057.8 |
| Mean [SD] age of onset of heaviest cocaine use in year | 27.2 (8.2) | 45.1 (5.0) | 29.3 (7.4) | 25.8 (8.4) | 2,158.0 |
| Used cocaine daily or almost daily | 861 (69.4) | 157 (87.2) | 3,026 (92.9) | 1,857 (96.9) | 540.8 |
| Injected cocaine intravenously | 388 (31.3) | 44 (24.4) | 129 (3.9) | 1,417 (74.0) | 1,804.4 |
| Stayed high from cocaine for a whole day or more | 594 (47.9) | 131 (72.8) | 2,628 (80.7) | 1,623 (84.7) | 576.2 |
| Strong desire for cocaine made it hard to think of anything else | 404 (32.6) | 118 (65.6) | 2,532 (77.7) | 1,619 (84.5) | 933.9 |
| Cocaine interfered with work, school, or home life | 318 (25.6) | 111 (617) | 2,475 (76.0) | 1,650 (86.1) | 1,132.4 |
| Family members, friends, doctor, clergy, boss, Or people at work or school objected to cocaine use |
475 (38.3) | 108 (60.0) | 2,683 (82.4) | 1,664 (86.9) | 961.2 |
| Been arrested or had trouble with the police because Of cocaine use |
310 (25.0) | 61 (33.9) | 1,776 (54.5) | 1,233 (64.4) | 465.6 |
| Gave up or greatly reduced important activities due to cocaine use |
419 (33.8) | 131 (72.8) | 2,853 (87.6) | 1,775 (92.6) | 1,418.3 |
| Ever treated for a cocaine-related problem | 432 (34.8) | 109 (60.6) | 2,372 (72.8) | 1,421 (74.2) | 585.6 |
| Ever attended self-help group for cocaine use | 363 (29.3) | 90 (50.0) | 2,186 (67.1) | 1,369 (71.5) | 601.2 |