Table 1.
Baseline Characteristics by Study Group
| Variable and statistics | CHTP | CC | Abstinence |
|---|---|---|---|
| Number (N) | 56 | 28 | 28 |
| Age, years (mean [SD]) | 36 (8.2) | 35.4 (7.4) | 37.9 (8.4) |
| Sex, n (%) | |||
| Female | 28 (50) | 14 (50) | 14 (50) |
| Male | 28 (50) | 14 (50) | 14 (50) |
| BMI, kg/m2 (mean [SD]) | 23.6 (2.2) | 23 (2.4) | 23.2 (2.5) |
| Usual cigarette consumption, n (%) | |||
| 10–19 cpd | 28 (50) | 14 (50) | 14 (50) |
| 20–30 cpd | 28 (50) | 14 (50) | 14 (50) |
| ISO tar yield, n (%) | |||
| 3–5 | 11 (19.6) | 3 (10.7) | 3 (10.7) |
| 6–8 | 22 (39.3) | 18 (64.3) | 19 (67.9) |
| 9–10 | 23 (41.1) | 7 (25) | 6 (21.4) |
| Fagerström score (mean [SD]) | 5.5 [2.0] | 5.6 [1.8] | 5.9 [1.1] |
BMI = body mass index; CC = combustible cigarette; CHTP = carbon-heated tobacco product MD2-E7; cpd = combustible cigarettes per day; ISO = International Organization for Standardization; N = number of subjects.