Table 5. Hazard Functions in Cumulative Percentages (and 95% CIs) for Age of Cigarette Initiation Outcomes by Race/Ethnicitya.
| Age, y | % (95% CI) | |||
|---|---|---|---|---|
| Non-Hispanic White | Hispanic | Non-Hispanic Black | Non-Hispanic otherb | |
| Onset of susceptibility cigarette use | ||||
| 12 | 0 | 0 | 0 | 0 |
| 13 | 12.7 (11.6-13.8) | 10.1 (8.6-11.5) | 10.6 (8.3-12.9) | 15.0 (12.4-17.5) |
| 14 | 19.1 (17.7-20.5) | 17.6 (15.7-19.5) | 15.9 (13.5-18.2) | 19.3 (16.2-22.4) |
| 15 | 25.9 (24.2-27.7) | 25.7 (23.4-28.1) | 20.6 (17.9-23.2) | 27.1 (23.1-31.0) |
| 16 | 32.1 (30.2-33.9) | 30.8 (28.6-33.0) | 26.5 (23.3-29.6) | 33.5 (29.2-37.8) |
| 17 | 41.3 (38.8-43.8) | 41.4 (38.8-44.0) | 32.5 (28.8-36.2) | 41.4 (35.5-47.4) |
| 18 | 46.0 (43.2-48.8) | 49.3 (46.2-52.5) | 39.2 (34.7-43.8) | 49.9 (44.0-55.8) |
| 19 | 49.1 (46.2-52.1) | 53.8 (50.1-57.6) | 44.4 (38.0-50.8) | 55.9 (46.9-64.9) |
| 20 | 57.1 (46.6-67.6) | 61.1 (50.2-71.9) | NA | 56.6 (41.6-71.6) |
| 21 | NA | 63.8 (46.8-80.9) | NA | NA |
| Initiation of ever cigarette use | ||||
| 12 | 0 | 0 | 0 | 0 |
| 13 | 1.4 (1.2-1.8) | 0.9 (0.6-1.3) | 1.4 (0.6-1.9) | 1.1 (0.5-1.8) |
| 14 | 3.3 (2.8-3.8) | 2.5 (1.8-3.2) | 2.3 (1.4-3.2) | 2.4 (1.6-3.3) |
| 15 | 6.0 (5.3-6.6) | 5.0 (4.1-5.8) | 3.5 (2.4-4.6) | 4.3 (2.9-5.7) |
| 16 | 10.1 (9.1-11.1) | 8.1 (6.7-9.5) | 5.0 (3.8-6.3) | 6.8 (5.1-8.4) |
| 17 | 17.1 (15.7-18.6) | 16.9 (15.0-18.9) | 9.5 (7.4-11.6) | 11.7 (9.1-14.3) |
| 18 | 26.2 (24.1-28.3) | 25.4 (22.4-28.4) | 19.2 (16.2-22.2) | 20.8 (15.8-25.7) |
| 19 | 33.4 (30.0-36.8) | 33.0 (29.1-36.9) | 21.3 (17.9-24.8) | 28.9 (20.8-37.0) |
| 20 | 33.4 (28.1-38.7) | NA | 26.1 (13.2-39.1) | 36.5 (14.9-58.1) |
| Initiation of past 30-d cigarette use | ||||
| 12 | 0 | 0 | 0 | 0 |
| 13 | 0.6 (0.4-0.7) | 0.3 (0.1-0.5) | 0.3 (0.1-0.7) | 0.7 (0.3-1.1) |
| 14 | 1.4 (1.0-1.8) | 0.9 (0.5-1.2) | 0.7 (0.2-1.2) | 1.4 (0.7-2.1) |
| 15 | 2.8 (2.3-3.2) | 1.9 (1.3-2.5) | 1.2 (0.6-1.8) | 2.4 (1.4-3.5) |
| 16 | 5.1 (4.4-5.8) | 3.9 (3.0-4.8) | 2.5 (1.5-3.5) | 3.6 (2.5-4.7) |
| 17 | 10.5 (9.3-11.7) | 9.4 (7.8-10.9) | 6.1 (4.3-7.9) | 6.7 (4.5-8.9) |
| 18 | 17.8 (16.2-19.4) | 16.1 (13.5-18.7) | 14.3 (11.7-17.0) | 14.4 (9.8-17.1) |
| 19 | 21.8 (19.5-24.0) | 19.5 (16.2-22.8) | 18.7 (13.0-24.3) | 21.4 (15.1-27.7) |
| 20 | 30.0 (22.0-39.8) | 23.0 (12.4-33.6) | 18.7 (13.4-24.0) | 24.9 (7.5-42.4) |
| 21 | 30.0 (20.5-39.6) | NA | NA | NA |
| Initiation of fairly regular cigarette use | ||||
| 12 | 0 | 0 | 0 | 0 |
| 13 | 0.3 (0.1-0.5) | 0.2 (0.1-0.4) | 0.2 (0.0-0.3) | 0.3 (0.1-0.6) |
| 14 | 0.8 (0.6-1.0) | 0.5 (0.2-0.7) | 0.2 (0.0-0.4) | 0.7 (0.1-1.3) |
| 15 | 1.8 (1-4-2.1) | 0.9 (0.5-1.3) | 0.2 (0.0-0.5) | 1.1 (0.3-1.9) |
| 16 | 3.1 (2.6-3.6) | 1.9 (1.3-2.5) | 1.0 (0.4-1.6) | 1.8 (1.2-2.6) |
| 17 | 4.5 (3.7-5.2) | 2.7 (1.7-3.6) | 1.1 (0.5-1.7) | 2.5 (1.5-3.4) |
| 18 | 5.4 (4.8-6.2) | 3.9 (2.6-5.3) | 1.8 (0.8-2.7) | 3.3 (2.1-4.6) |
| 19 | 6.9 (5.3-8.6) | 6.4 (3.4-9.4) | NA | 4.4 (2.2-6.6) |
| 20 | 8.1 (5.6-10.6) | 9.9 (1.4-18.5) | NA | 10.7 (0-25.2) |
Abbreviation: NA, not available.
a
Population Assessment of Tobacco and Health (PATH) Study data reprinted with permission from the United States Department of Health and Human Services.18 Restricted file received disclosure to publish: February 10, 2020; February 17, 2020; February 28, 2020; March 06, 2020; May 01, 2020.
b
Non-Hispanic other indicates non-Hispanic Asian participants, multirace/ethnicity, etc.