Table 4. Distribution of Combustible Cigarette Use (Never, Former, and Current) Among Individuals Who Use E-Cigarettes (Current and Daily) Across Age Groups, 2021 Behavioral Risk Factor Surveillance System.
| Age group, y | Weighted prevalence of combustible cigarette use, % (95% CI) | ||
|---|---|---|---|
| Never combustible cigarette use | Former combustible cigarette use | Current combustible cigarette use | |
| Current e-cigarette use | |||
| Total population | 20.7 (19.7-21.8) | 42.2 (40.7-43.7) | 37.1 (35.6-38.6) |
| 18-20 | 71.5 (66.8-75.7) | 13.2 (9.5-18.2) | 15.3 (12.9-18.1) |
| 21-24 | 53.0 (49.8-56.1) | 26.0 (23.2-29.0) | 21.0 (18.6-23.6) |
| 25-29 | 32.0 (28.8-35.4) | 37.6 (34.2-41.1) | 30.4 (27.0-34.0) |
| 30-34 | 18.5 (15.8-21.7) | 45.9 (42.4-49.6) | 35.5 (32.1-39.1) |
| 35-39 | 14.0 (10.9-17.8) | 44.6 (40.6-48.7) | 41.4 (37.3-45.5) |
| 40-44 | 10.0 (7.3-13.6) | 49.0 (44.3-53.8) | 41.0 (36.4-45.7) |
| 45-49 | 12.0 (9.0-15.8) | 41.3 (36.2-46.5) | 46.7 (41.3-52.3) |
| 50-54 | 8.1 (5.6-11.7) | 47.5 (41.6-53.5) | 44.4 (38.7-50.2) |
| 55-59 | 8.1 (6.0-10.7) | 49.0 (43.3-54.6) | 43.0 (37.5-48.7) |
| ≥60 | 14.5 (12.0-17.5) | 46.9 (42.9-51.0) | 38.6 (34.6-42.6) |
| Daily e-cigarette use | |||
| Total population | 14.7 (13.6-16.0) | 58.1 (55.8-60.4) | 27.2 (25.0-29.4) |
| 18-20 | 66.5 (61.2-71.4) | 17.8 (14.0-22.2) | 15.7 (12.4-19.7) |
| 21-24 | 41.2 (36.6-45.9) | 39.6 (35.0-44.4) | 19.3 (16.2-22.8) |
| 25-29 | 18.6 (15.3-22.4) | 52.9 (47.8-57.9) | 28.5 (23.7-33.9) |
| 30-34 | 12.4 (9.4-16.2) | 61.9 (57.1-66.4) | 25.7 (21.9-30.0) |
| 35-39 | 8.5 (6.0-11.8) | 64.2 (57.9-70.0) | 27.4 (21.8-33.8) |
| 40-44 | 7.8 (4.4-13.4) | 66.7 (59.5-73.2) | 25.5 (19.7-32.4) |
| 45-49 | 7.4 (4.3-12.5) | 65.2 (57.1-72.5) | 27.3 (20.5-35.5) |
| 50-54 | 4.1 (2.5-6.6) | 65.8 (56.9-73.8) | 30.1 (22.5-39.1) |
| 55-59 | 4.8 (2.6-8.7) | 64.5 (55.7-72.5) | 30.7 (23.1-39.5) |
| ≥60 | 9.5 (6.8-13.3) | 60.2 (53.8-66.3) | 30.2 (24.4-36.8) |