Table 1.

Baseline sample characteristics

	Dual users of e-cigarettes (n=298)	Dual users of OTC NRT (n=115)	P value
Sociodemographic characteristics
Age (years), % (n)
16–31	20.1 (60)	10.4 (12)	0.006
32–47	29.9 (89)	20.9 (24)	–
48–63	35.9 (107)	47.0 (54)	–
≥64	14.1 (42)	21.7 (25)	–
Female, % (n)	46.0 (137)	51.2 (59)	0.331
Social grade C2DE, % (n)	52.7 (157)	58.3 (67)	0.308
Smoking characteristics
Cigarettes per day, mean (SD)	13.52 (9.56)	11.82 (6.94)	0.049
Strength of urges to smoke (range 0–5), mean (SD)	2.26 (1.03)	2.13 (1.05)	0.266
Non-daily smoker, % (n)	9.7 (29)	10.4 (12)	0.830
High motivation to quit, % (n)	23.2 (69)	35.8 (41)	0.010
Attempted to quit in past year, % (n)	48.6 (144)	53.6 (60)	0.375

Age was categorised by SD bands (16 years), with ≥80 collapsed into the 64–79 group due to low numbers.

OTC NRT, over-the-counter nicotine replacement therapy.