Table 1

Experience of use of HTPs at home where smoking was not permitted in the last year

		Ever use					Frequent use
		n/N (%)	Crude OR (95% CI)	P value	Adjusted OR (95% CI)	P value	n/N (%)	Crude OR (95% CI)	P value	Adjusted OR (95% CI)	P value
Sex	Male	115/585 −19.70	0.73 (0.47 to 1.13)	0.159	0.68 (0.42 to 1.12)	0.128	49/585 −8.40	0.54 (0.31 to 0.95)	0.033	0.58 (0.31 to 1.09)	0.090
Sex	Female	33/131 −25.20	Reference		Reference		19/131 −14.50	Reference		Reference
Age	16–29	18/97 −18.60	0.83 (0.43 to 1.61)	0.585	0.76 (0.37 to 1.54)	0.442	10/97 −10.30	1.3 (0.53 to 3.18)	0.572	1.01 (0.38 to 2.67)	0.990
	30–39	19/131 −14.50	0.62 (0.33 to 1.17)	0.141	0.62 (0.32 to 1.20)	0.155	10/131 −7.60	0.93 (0.38 to 2.27)	0.876	0.84 (0.34 to 2.10)	0.715
	40–49	37/168 −22.00	1.03 (0.60 to 1.79)	0.909	1.03 (0.59 to 1.82)	0.916	18/168 −10.70	1.35 (0.62 to 2.97)	0.452	1.22 (0.54 to 2.73)	0.636
	50–59	45/185 −24.30	1.17 (0.69 to 2.00)	0.552	1.25 (0.73 to 2.15)	0.414	19/185 −10.30	1.29 (0.59 to 2.81)	0.521	1.32 (0.60 to 2.90)	0.494
	60 and above	29/135 −21.50	Reference		Reference		11/135 −8.10	Reference		Reference
Final education	Lower than college degree	69/296 −23.30	1.31 (0.91 to 1.89)	0.144	1.34 (0.91 to 1.96)	0.137	37/296 −12.50	1.31 (0.91 to 1.89)	0.023	1.69 (1.00 to 2.85)	0.049
Final education	College degree or higher	79/420 −18.80	Reference		Reference		31/420 −7.40	Reference		Reference
Combustible tobacco use in the last year	Non smoker	24/143 −16.80	0.73 (0.45 to 1.18)	0.201	0.71 (0.43 to 1.17)	0.18	12/143 −8.40	0.85 (0.44 to 1.62)	0.615	0.75 (0.38 to 1.47)	0.402
Combustible tobacco use in the last year	Ever smoker	124/573 −21.60	Reference		Reference		56/573 −9.80	Reference		Reference
Do you think HTP use is also forbidden in places where tobacco smoking is forbidden?	No	47/199 −23.60	1.27 (0.86 to 1.89)	0.228	1.22 (0.81 to 1.82)	0.338	23/199 −11.60	1.37 (0.81 to 2.33)	0.245	1.29 (0.75 to 2.22)	0.354
	Yes	101/517 −19.50	Reference		Reference		45/517 −8.70	Reference		Reference
Do you think passive smoking of HTP is harmful?	No	80/331 −24.20	1.49 (1.03 to 2.14)	0.033	1.42 (0.98 to 2.07)	0.064	34/331 −10.30	1.49 (1.03 to 2.14)	0.033	1.16 (0.69 to 1.93)	0.576
Do you think passive smoking of HTP is harmful?	Yes	68/385 −17.70	Reference		Reference		34/385 −8.80	Reference		Reference
Total		148/716 −20.70					68/716 −9.50

CI, confidence interval; HTPs, heated tobacco products; OR, odds ratio.