Table 2.
Puffing Topography in the CHTP Group Stratified by Tar Level of Usual Brand at Baseline (Day 0)
| Tar level 3–5mg N = 7 | Tar level 6–8mg N = 18 | Tar level 9–10mg N = 20 | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Visit | Day 0 | Day 1 | Day 5 | Day 0 | Day 1 | Day 5 | Day 0 | Day 1 | Day 5 |
| Puff duration (s) | 2.1 (0.77) | 2.1 (0.60) | 2.2 (0.67) | 1.8 (0.40) | 2.3 (0.65) | 2.4 (0.74) | 1.8 (0.52) | 2.2 (0.46) | 2.2 (0.59) |
| Puff volume (ml) | 73.9 (21.35) | 83.8 (21.23) | 91.6 (21.96) | 57.9 (12.45) | 90.3 (31.03) | 94.0 (44.63) | 53.9 (13.27) | 80.0 (20.41) | 82.4 (21.09) |
| Puff number (n) | 15.7 (2.36) | 22.1 (2.11) | 24.5 (2.50) | 13.3 (2.24) | 21.5 (4.31) | 21.9 (4.53) | 13.8 (3.62) | 22.7 (3.78) | 25.0 (3.13) |
| Total volume (ml) | 1139.0 (218.59) | 1848.0 (526.04) | 2196.6 (451.41) | 767.3 (144.91) | 1846.7 (417.97) | 1920.8 (519.34) | 728.6 (134.99) | 1779.0 (448.22) | 2012.3 (433.97) |
| Cigarettes per day | 17.6 (2.76) | 14.6 (4.16) | 18.9 (5.24) | 17.8 (3.79) | 15.7 (4.03) | 19.8 (5.95) | 17.4 (3.47) | 16.6 (5.56) | 19.6 (8.23) |
| Neq (geometric mean, 95% CI, mg/24h) | 11.5 (8.8–15.1) | 10.7 (7.7–15.0) | 12.9 (7.5–22.3) | 10.0 (8.5–11.7) | 10.2 (8.7–12.1) | 12.6 (10.7–14.8) | 12.5 (9.3–16.6) | 12.0 (9.3–15.6) | 16.2 (13.9–18.9) |
CI = confidence interval; CHTP = carbon-heated tobacco product MD2-E7; M = Mean; Neq = nicotine equivalent. Data in the table are presented as mean (SD), except where indicated.