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| Study A | Study B | |||||
| JUUL Pooled (N = 60) | CC (N = 15) | Abstinence (N = 15) | JUUL Pooled (N = 199) | CC (N = 24) | Dual Use (N = 48) | Abstinence (N = 29) | |
| Age (Years), Mean (SD) | 39.0 (10.85) | 40.3 (11.13) | 38.6 (14.26) | 39.3 (10.96) | 42.9 (10.93) | 40.7 (11.01) | 41.5 (12.59) |
| Gender, n (%) |
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| Female | 23 (38.3%) | 6 (40.0%) | 5 (33.3%) | 96 (48.2%) | 11 (45.8%) | 24 (50.0%) | 12 (41.4%) |
| Male | 37 (61.7%) | 9 (60.0%) | 10 (66.7%) | 103 (51.8%) | 13 (54.2%) | 24 (50.0%) | 17 (58.6%) |
| Race, n (%) |
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| African American | 9 (15.0%) | 1 (6.7%) | 3 (20.0%) | 86 (43.2%) | 11 (45.8%) | 19 (39.6%) | 10 (34.5%) |
| Caucasian | 49 (81.7%) | 13 (86.7%) | 10 (66.7%) | 104 (52.3%) | 11 (45.8%) | 29 (60.4%) | 17 (58.6%) |
| Others | 2 (3.3%) | 1 (6.7%) | 2 (13.3%) | 9 (4.5%) | 2 (8.3%) | 0 (0.0%) | 2 (6.9%) |
| BMI (kg/m2), Mean (SD) | 28.2 (5.35) | 27.8 (4.28) | 27.5 (5.67) | 28.5 (5.43) | 28.3 (5.04) | 29.3 (5.08) | 28.5 (4.88) |
| Smoke Duration (Years), Mean (SD) | 20.2 (12.51) | 20.1 (13.44) | 21.5 (15.88) | 20.9 (11.96) | 25.7 (12.51) | 21.9 (12.23) | 20.3 (12.54) |
| Cigarettes Smoked per Day, Mean (SD) | 16.5 (3.85) | 15.1 (3.66) | 16.2 (2.58) | 18.1 (6.12) | 17.9 (3.94) | 18.5 (6.15) | 18.5 (5.63) |
| Ever ENDS User?, n (%) |
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| No | 56 (93.3%) | 15 (100.0%) | 15 (100.0%) | 188 (94.5%) | 22 (91.7%) | 43 (89.6%) | 27 (93.1%) |
| Yes | 4 (6.7%) | 0 (0.0%) | 0 (0.0%) | 11 (5.5%) | 2 (8.3%) | 5 (10.4%) | 2 (6.9%) |