Table 2

Effects of characteristics of waterpipe smokers and duration of smoking on rise in exhaled carbon monoxide concentration

Characteristic

N (%)

Unadjusted coefficient (95%CI) for ppm rise in CO

Adjusted2 coefficient (95%CI) for ppm rise in CO


Duration of session

29.6 (10.1)1

15.8 (11.0–20.6)3

14.8 (9.3–20.3)3

Age of participant in years

22.8 (4.3)1

1.8 (0.4–3.2)4

-0.1 (-1.4–1.2)4

Ethnic group

White and others

43 (68.3)

Reference

Reference

Asian

28 (44.4)

-15.5 (-29.4–1.7)

-5.6 (-18.4–7.2)

Arab

15 (23.8)

3.7 (-12.5–19.9)

-1.9 (-15.3–11.5)

Gender

Male

49 (77.8)

15.9 (5.1–26.6)

6.4 (-6.9–19.6)

Female

14 (22.2)

Reference

Reference


1 Mean (SD).

2 Adjusted for all variables in table.

3 For a 10 minute increase in duration.

4 For a 1 year increase in age.

Jackson and Aveyard BMC Public Health 2008 8:174   doi:10.1186/1471-2458-8-174

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