Table 1

Sociodemographic characteristics and smoking-status of all respondents and their associations with awareness, ever use and intention to use of HTPs

	All respondents (N=5131)		Awareness of HTPs (N=719)			Ever use of HTPs (N=115)			Intention to use HTPs in never HTP users (N=593)*
	n	%	n	%	P value	n	%	P value	n	%	P value
Sex					<0.001			<0.001			<0.001
Male	3422	45.2	517	14.0		92	1.7		54	11.1
Female	1709	54.8	201	9.1		23	0.4		18	2.9
Age, years					0.009			<0.001			0.008
≥60	2453	26.7	240	9.4		12	0.1		11	2.5
50–59	1029	19.2	136	9.3		16	0.7		10	3.0
40–49	703	17.5	140	14.7		31	1.4		16	8.7
30–39	387	17.7	107	14.6		34	2.3		20	15.5
15–29	536	19.0	93	9.7		22	0.9		15	6.6
Educational attainment					0.05			0.003			0.002
Primary or below	1041	11.7	92	7.1		4	0.1		2	0.9
Secondary	2634	44.2	377	11.9		55	1.1		32	4.7
Tertiary or above	1434	44.1	246	11.8		56	1.1		38	11.2
Marital status					0.52			0.01			0.05
Single	971	32.0	181	11.1		48	1.4		29	12.1
Married/cohabited	3531	59.4	461	11.8		56	0.8		38	5.4
Divorced/widowed	580	8.6	71	9.3		10	0.8		5	5.0
Employment					<0.001			<0.001			<0.001
Economically non-active	2878	50.4	294	8.8		15	0.1		15	2.3
Economically active	2185	49.6	415	14.0		99	1.8		56	11.0
Monthly household income (HK$)					0.29			<0.001			0.004
≤19 999	1768	30.3	182	10.0		14	0.5		12	3.2
20 000–39 999	1389	33.1	208	11.7		30	0.9		19	5.2
≥40 000	1284	36.6	247	13.0		61	1.7		33	12.5
Had children					0.28			<0.001			0.15
Yes	3702	60.7	466	10.8		51	0.7		37	5.6
No	1303	39.4	240	12.3		63	1.5		34	9.9
Place of birth					0.051			0.052			0.04
Others	1955	27.8	204	9.3		18	0.6		14	4.0
Hong Kong	3089	72.2	506	12.2		97	1.2		58	8.5
Smoking status					<0.001			<0.001			<0.001
Never smokers	1712	84.2	156	9.4		1	0.05		3	2.7
Ex-smokers	1715	5.6	186	12.1		6	0.6		6	3.5
Current smokers	1704	10.2	376	27.1		108	8.9		63	28.8
Ever use of e-cig					<0.001			<0.001			<0.001
No	4718	96.3	586	10.5		40	0.4		51	5.6
Yes	413	3.8	132	30.9		75	16.7		21	39.8

The proportions were weighted by age, sex and conventional cigarette smoking status distribution of 2015 Hong Kong; the observations (n) were unweighted.
Employment status was dichotomized into economically active (being an employer, employee or self-employed) vs economically non-active (being a student, housekeeper, unemployed or retired).
US$1=HK$7.8; p values were from χ² test.
*593 of 719 respondents who were aware of HTPs but had never used it.
HTP, heated tobacco product; e-cig, electronic cigarettes.