Cigarette Use Among United States Adolescents by High School Grade, 1991 vs 2021
| Cigarette Use by Year, % (95% CI)a | |||
|---|---|---|---|
| Cigarette Usage Category | High School Grade | 1991 | 2021 |
| Ever | 9 | 64.8 (61.6-67.9) | 13.9 (11.6-16.6) |
| 10 | 68.3 (64.8-71.6) | 16.4 (13.9-19.2) | |
| 11 | 72.8 (69.3-76.0) | 18.3 (16.1-20.7) | |
| 12 | 74.5 (71.2-77.6) | 22.7 (19.7-26.0) | |
| Overall | 70.1 (67.8-72.3) | 17.8 (15.9-19.9) | |
| Occasional | 9 | 23.2 (19.5-27.4) | 2.2 (1.6-3.0) |
| 10 | 25.2 (22.5-28.1) | 3.8 (3.0-4.8) | |
| 11 | 31.6 (27.8-35.7) | 4.1 (3.4-5.0) | |
| 12 | 30.1 (25.7-34.8) | 5.2 (4.4-6.2) | |
| Overall | 27.5 (24.8-30.3) | 3.8 (3.3-4.4) | |
| Frequent | 9 | 8.4 (6.2-11.3) | 0.4 (0.2-0.8) |
| 10 | 11.3 (9.0-14.1) | 0.6 (0.3-1.3) | |
| 11 | 15.6 (12.9-18.8) | 0.8 (0.4-1.4) | |
| 12 | 15.6 (12.4-19.4) | 1.0 (0.7-1.5) | |
| Overall | 12.7 (10.6-15.3) | 0.7 (0.6-1.0) | |
| Daily | 9 | 6.4 (4.6-8.7) | 0.3 (0.1-0.7) |
| 10 | 8.8 (6.5-11.8) | 0.4 (0.2-0.9) | |
| 11 | 12.2 (9.7-15.2) | 0.6 (0.3-1.0) | |
| 12 | 12.2 (9.7-15.2) | 0.9 (0.6-1.3) | |
| Overall | 9.8 (7.8-12.2) | 0.6 (0.4-0.8) | |
↵aStatistically significant differences (P<0.05) were observed in cigarette use between 1991 and 2021 across all high school grades.
Note: Ever is defined as taking even 1 or 2 puffs; occasional is defined as smoking on at least 1 day during the 30 days before completing the Youth Risk Behavior Survey; frequent is defined as smoking on 20 or more days during the 30 days before the survey; and daily is defined as smoking on all 30 days during the 30 days before the survey.