Table 1.

Participants' characteristics

Participant Pseudonym	Age	Gender	Age of first cigarette	Initiation setting	Current smoking	Smoking Frequency	Age of first ENDS use	Initiation setting†	Owned ENDS‡	Current vaping	ENDS used (current*)§	Nicotine
Andy	22	M	17	Social	Intermittent	<weekly	21	Alone	Yes	Stopped	Cigalike vape pen*	Yes
Ben	20	M	17	Social	Intermittent	<weekly	19	Social	No	Intermittent	Mod	Yes
Craig	19	M	14	Social	Not smoking		19	Social	No	Intermittent	Vape pen	Yes (unsure)
Dani	19	F	18	Social	Smoking	8–10/day	19	Alone	Yes	Intermittent	Cigalike	No
Edward	22	M	15	Social	Smoking	20+/day	21	Social	No	Intermittent	Vape pen	No (unsure)
Freddie	23	M	17	Personal	Intermittent	1–2/day	23	Alone	Yes	Daily	Mod	Yes
Gavin	23	M	14	Personal	Intermittent	<weekly	22	Social	Yes	Daily	Cigalike mod*	Yes
Hettie	20	F	18	Social	Intermittent	<weekly	20	Social	No	Intermittent	Vape pen cigalike*	No (unsure)
Izzy	20	F	16	Social	Intermittent	2–3 days/week	20	Social	Yes	Daily	Cigalike	Yes
Jackie	23	F	16	Social	Not smoking		22	Social	Yes	Daily	Cigalike mod*	Yes
Kevin	24	M	21	Social	Intermittent	Once a week	24	Social	No	Intermittent	Vape pen	Yes (unsure)
Lee	22	M	18	Social	Not smoking		22	Social	Yes	Daily	Cigalike vape pen mod*	Yes
Mona	22	F	14	Social	Intermittent	Once a week	21	Social	Yes	Daily	Cigalike vape pen*	Yes no
Neil	20	M	18	Social	Very infrequent	1–2/year	19	Social	Yes	Daily	Mod	No
Olivia	19	F	18	Social	Very infrequent	Rarely	19	Social	No	Intermittent	Cigalike vape pen*	Yes
Petra	25	F	18	Social	Daily	3–5/day; 10–20 when drinking	20	Social	Yes	Daily	Cigalike	Unsure

†Participants described as personal had purchased an ENDS device and initiated use while alone rather than in a social setting.

‡Owned an EC or vaporiser refers to situation when interviewed.

§Asterisk (*) used to indicate the ENDS device currently used (where participants reported experience with more than one ENDS).

ENDS, electronic nicotine delivery system.