Table 3

Tobacco smoke odour from other apartments and hallways. Comparison of infrequent vs frequent tobacco smoke odour detected†

Tobacco smoke odours from other apartments or hallways		Nicotine (μg/m³)				SR_eff (cig/day)
Smoking status	Tobacco smoke odour detected‡	No	Median	Mean	p Value	No	Median	Mean	p Value
All participants	Infrequent	30	0.15	2.76		29	0.45	6.23
	Frequent	18	0.11	1.25	0.594	18	0.34	5.57	0.677
Non-smoking participants	Infrequent	18	0.04	0.09		18	0.14	0.24
	Frequent	15	0.08	0.35	0.262	15	0.26	1.51	0.082

Smoking participants	Infrequent	12	3.02	6.78		11	11.51	16.02
	Frequent	3	0.96	5.75	0.563	3	3.88	25.90	0.938

Non-smoking homes	Infrequent	10	0.04	0.09		10	0.14	0.24
	Frequent	9	0.06	0.07	1.000	9	0.20	0.27	0.462

Smoking homes	Infrequent	16	2.53	5.12		15	4.60	11.85
	Frequent	6	0.94	3.44	0.825	6	3.80	15.16	0.640

†Response from question, “In your apartment, how often do you smell cigarette odour from other apartments or the hallways?”
‡Infrequent = (⩽ once/year, few/year, few/month), frequent = (few/week, every day).