Table 1.
Principal Components Analysis of Reasons for Quitting Cannabis Use Among 385 Adult, Non-Treatment Seeking Cannabis Smokers.
| Factor | Reason for quitting | Eigenvalue | % Variance explained | Loading | % (n) endorsing ≥ two items in component | % (n) reporting | Cronbach α | MIC |
|---|---|---|---|---|---|---|---|---|
| Self-image and self-control | 2. I would like myself better if I quit | 7.63 | 14.34 | 0.526 | 91 (350) | 59(226) | 0.83 | 0.41 |
| 4. I could feel in control of my life | 0.672 | 66 (255) | ||||||
| 7. Using marijuana did not fit who I want to be | 0.574 | 6 (239) | ||||||
| 13. To get more things done during the day | 0.683 | 62 (240) | ||||||
| 15. To save money | 0.634 | 8 (323) | ||||||
| 23. To not be a bad example for children | 0.556 | 70 (269) | ||||||
| 24. To have more energy | 0.663 | 73 (280) | ||||||
| Health concerns | 10. Concern about having health problems | 2.06 | 12.22 | 0.817 | 56 (215) | 58 (222) | 0.83 | 0.50 |
| 11. Concern about suffering from a serious illness | 0.829 | 42 (160) | ||||||
| 14. Noticed symptoms that marijuana was hurting my health | 0.698 | 45 (175) | ||||||
| 18. Knew other people with health problems from marijuana | 0.564 | 21 (79) | ||||||
| 19. Be worried that marijuana would shorten life | 0.724 | 39 (152) | ||||||
| Interpersonal relationship concerns | 5. Close people would stop nagging at me | 1.77 | 9.25 | 0.656 | 49 (187) | 54 (209) | 0.72 | 0.39 |
| 6. To get praise from people I am close to | 0.637 | 37 (143) | ||||||
| 9. Someone gave an ultimatum | 0.599 | 21 (79) | ||||||
| 12. Close people would be upset with me | 0.752 | 50 (191) | ||||||
| Legal concerns | 20. Because of legal problems | 1.55 | 8.23 | 0.787 | 35 (173) | 33 (128) | 0.75 | 0.51 |
| 21. To avoid a conviction or jail sentence | 0.824 | 3 (131) | ||||||
| 22. To avoid involvement to criminal activities | 0.691 | 42 (162) | ||||||
| Social acceptability concerns | 3. To don’t have to leave social events | 1.13 | 8.23 | 0.471 | 46 (173) | 30 (115) | 0.73 | 0.40 |
| 8. Using marijuana is becoming less socially acceptable | 0.588 | 38 (145) | ||||||
| 25. Hair and clothes wouldn’t smell like marijuana | 0.577 | 47 (182) | ||||||
| 26. To not burn holes in clothes and furniture | 0.653 | 33 (127) | ||||||
| Self-efficacy | 1. To show myself that I could quit | 1.05 | 6.09 | 0.814 | 71 (273) | 91 (350) | 0.64 | 0.49 |
| 16. To prove to myself that I was not addicted | 0.770 | 72 (279) |
MIC = Mean Inter-item Correlation