Table 3.

Smoke constituent mouth-level exposure per 24 h by site; geometric means with their 95% confidence intervals

Study sitenSmoke nicotine (mg/24 h)Smoke NNN (ng/24 h)Smoke NNK (ng/24 h)
Geometric mean (95% confidence limits)Geometric mean (95% confidence limits)Geometric mean (95% confidence limits)
Canada2524.4 (20.3-29.5)246 (204-297)449 (372-541)
United States (New York)2520.4 (17.8-23.3)3,140 (2,720-3,630)1,490 (1,270-1,750)
United States (Minnesota)2818.6 (15.9-21.8)2,510 (2,108-2,989)1,150 (931-1,420)
Australia2527.4 (23.4-32.0)368 (303-448)350 (289-424)
United Kingdom2319.0 (15.9-22.7)1,390 (1,070-1,800)1,010 (797-1,280)