Table 1.

Demographic characteristics of adult smokers who had heard of but never used e-cigarettes in four Chinese cities, 2018

Characteristics	Chengdu (N=232)		Wuhan (N=259)		Xiamen (N=237)		Xi'an (N=279)		Overall (N=1007)
	n	%	n	%	n	%	n	%	n	%
Sex
Female	26	10.0	12	4.8	7	3.2	9	5.6	54	6.5
Male	206	90.0	247	95.2	230	96.8	270	94.4	953	93.5
Age (years)
15–24	20	16.4	12	6.8	9	14.1	10	18.7	51	14.7
25–44	109	45.7	101	38.0	147	64.3	112	39.4	469	45.1
45–64	79	32.6	119	46.7	71	19.4	137	38.1	406	35.2
≥65	24	5.3	27	8.6	10	2.3	20	3.8	81	5.1
Education level
Primary school or below	22	7.5	13	4.2	24	9.6	8	6.1	67	6.7
Junior high school completed	49	17.6	53	22.8	84	33.1	44	13.4	230	19.9
Senior high school completed	65	31.4	122	46.1	67	30.6	107	38.7	361	36.5
College degree or above	95	43.5	68	26.9	61	26.8	118	41.9	342	36.9
Occupation
Gov. employee, teacher, healthcare provider	21	10.2	20	7.3	15	7.8	37	12.9	93	10.0
Factory, business, service industry employee	119	56.9	114	45.4	150	58.3	132	48.6	515	52.2
Not in the labor forcea	90	32.9	124	47.3	71	34.0	107	38.5	392	37.8

^aRespondents who were not in the labor force included students, homemakers, retired, and unemployed residents either able or unable to work.