Table 3.
Geometric mean COex level by certain smoking characteristics among 135 521 current regular smokers
| Smoking characteristics | Men |
Women |
||
|---|---|---|---|---|
| No. | Mean COex (95% CI), ppm | No. | Mean COex (95% CI), ppm | |
| Any tobacco smokera | ||||
| Hand-rolled cigarettes only | 12 615 | 10.8 (10.0–11.6) | 631 | 8.7 (7.4–10.1) |
| Pipe or water-pipe only | 1 984 | 13.1 (12.2–14.2) | 40 | 12.3 (9.5–15.8) |
| Mixed types | 4 843 | 14.3 (13.3–15.4) | 90 | 11.1 (9.1–13.6) |
| Manufactured cigarettes only | 108 920 | 15.1 (14.1–16.2) | 6398 | 13.1 (11.3–15.1) |
| Manufactured cigarette smokers only | ||||
| No. smoked on the day of surveyb | ||||
| 0 | 15 575 | 5.5 (5.4–5.5) | 1428 | 4.5 (4.3–4.7) |
| 1–2 | 20 503 | 9.3 (9.2–9.4) | 2504 | 8.9 (8.5–9.3) |
| 3–4 | 23 650 | 12.2 (12.1–12.3) | 1436 | 11.5 (10.9–12.0) |
| 5–8 | 27 154 | 14.4 (14.3–14.5) | 757 | 12.8 (12.1–13.6) |
| ≥9 | 22 038 | 16.5 (16.3–16.6) | 273 | 13.4 (12.3–14.7) |
| No. smoked in past hourb,c | ||||
| 0 | 32 265 | 11.2 (11.1–11.2) | 2570 | 9.1 (8.7–9.5) |
| 1 | 38 240 | 13.1 (13.0–13.2) | 2122 | 10.5 (10.0–11.1) |
| ≥2 | 22 840 | 14.9 (14.8–15.0) | 278 | 12.0 (11.0–13.1) |
| No. smoked in usual daya | ||||
| 1–4 | 5 672 | 12.5 (11.6–13.4) | 1498 | 10.7 (9.3–12.3) |
| 5–14 | 30 356 | 14.1 (13.1–15.1) | 3455 | 12.3 (10.7–14.1) |
| 15–24 | 54 980 | 15.8 (14.7–16.9) | 1334 | 12.7 (11.1–14.5) |
| ≥25 | 17 912 | 16.1 (15.0–17.2) | 111 | 13.7 (11.5–16.2) |
| Age started smoking (years)d | ||||
| <20 | 36 832 | 17.4 (16.3–18.7) | 1684 | 12.7 (11.0–14.5) |
| 20–24 | 41 605 | 16.6 (15.5–17.8) | 1162 | 12.9 (11.3–14.8) |
| 25–30 | 14 918 | 15.8 (14.7–16.9) | 811 | 12.5 (10.9–14.4) |
| ≥30 | 15 565 | 14.3 (13.4–15.4) | 2741 | 12.5 (10.9–14.2) |
| Level of inhalatione | ||||
| To mouth only | 23 949 | 14.1 (13.2–15.1) | 1920 | 11.3 (9.9–13.0) |
| To throat only | 30 508 | 15.7 (14.7–16.8) | 1914 | 13.1 (11.4–14.9) |
| Lung | 54 463 | 17.5 (16.4–18.8) | 2564 | 13.7 (12.0–15.6) |
aAdjusted for age at survey, area, time of day, season, no. of cigarettes smoked on day of survey and level of inhalation.
bAdjusted for age at survey, area, time of day, season and level of inhalation.
cRestricted to participants who had smoked 1 cigarette or more on the day of survey.
dAdjusted for area, time of day, season, no. of cigarettes smoked on the day of survey and level of inhalation.
eAdjusted for age at survey, area, time of day, season and no. of cigarettes smoked on the day of survey.