Table 3. Unadjusted Means of Puffing Topography Measures by Nicotine Form, Concentration, and Flavor.
| Variable | Measure, mean (95% CI) | |||||
|---|---|---|---|---|---|---|
| Total puff count, No. | Puff duration, s | Interpuff interval, s | Volume per puff, mL | Total puff volume, mL | Velocity, mL/S | |
| Nicotine form | ||||||
| Salt | 16.0 (14.4-17.6)a | 3.0 (2.8-3.1)a | 117.7 (106.3-129.1) | 46.4 (43.5-49.3)a | 785.2 (702.4-868.1)a | 16.8 (16.0-17.7) |
| Freebase | 14.2 (12.6-15.8)a | 2.9 (2.8-3.0)a | 123.9 (109.8-138.0) | 42.2 (40.1-44.4)a | 742.3 (664.2-820.4)a | 17.7 (16.6-18.8) |
| Nicotine concentration, % | ||||||
| 1 | 17.1 (15.5-18.7)a | 3.1 (3.0-3.3)a | 115.1 (102.6-127.5)a | 49.4 (46.6-52.2)a | 900.6 (813.5-987.6)a | 17.3 (16.5-18.2) |
| 5 | 13.1 (11.6-14.6)a | 2.7 (2.6-2.8)a | 126.9 (114.0-139.8)a | 38.7 (36.8-40.7)a | 608.8 (543.8-673.8)a | 17.2 (16.1-18.3) |
| Flavor | ||||||
| Menthol | 15.2 (13.7-16.8) | 3.0 (2.8-3.1)a | 114.8 (103.7-125.8) | 44.8 (42.5-47.1) | 757.3 (684.9-829.7) | 16.9 (16.1-17.8) |
| Tobacco | 15.0 (13.3-16.6) | 2.9 (2.8-3.1)a | 126.6 (112.4-140.7) | 43.9 (41.1-46.6) | 773.1 (683.8-862.3) | 17.5 (16.5-18.6) |
a
Significant difference between the 2 conditions of nicotine form, concentration, and flavor in generalized linear mixed models.