TABLE 1.
Demographic Characteristics of Subjects at Baseline
| CHS (CA) | H&H Study (CA) | YASS (CT) | |
|---|---|---|---|
| N = 1553 | N = 3190 | N = 1404 | |
| Sex | |||
| Male | 752 (48.4) | 1467 (46.0) | 637 (45.4) |
| Female | 801 (51.6) | 1723 (54.0) | 767 (54.6) |
| Race/Ethnicity | |||
| Non-Hispanic white | 592 (38.1) | 512 (16.0) | 1198 (85.3) |
| Hispanic white | 758 (48.8) | 1505 (47.2) | 66 (4.7) |
| Other | 203 (13.1) | 1173 (36.8) | 140 (10.0) |
| Baseline grade | |||
| Ninth | — | 3190 (100.0) | 417 (29.7) |
| 10th | 21 (1.3) | — | 363 (25.9) |
| 11th | 866 (55.8) | — | 340 (24.2) |
| 12th | 666 (42.9) | — | 283 (20.2) |
| Baseline e-cigarette use | |||
| No | 1197 (77.3) | 2211 (70.8) | 1078 (76.9) |
| Yes | 351 (22.7) | 911 (29.2) | 323 (23.1) |
| Baseline cigarette use | |||
| No | 1293 (83.5) | 2660 (85.2) | 1212 (86.3) |
| Yes | 255 (16.5) | 463 (14.8) | 192 (13.7) |
Data are presented as n (%). Totals may vary because of missing data. CA, California; CT, Connecticut; —, no participants.