Table 1 Details of baseline and follow-up outcomes

General data

 Eligibility criteria

X

 Consent

X

X

 Age, gender, ethnicity, education

X

 Height

X

 Weight

X

X

X

 Current medication^d

X

X

X

X

X

 Health state

X

X

X

 Alcohol and cannabis use

X

 Pregnancy

X

X

X

X

X

Smoking information

 Type of tobacco smoked

X

 Cigarettes smoked per day^b

X

X

X

X

X

 Age started

X

 Years smoked

X

 Time to first cigarette upon waking

X

 Household smoking

X

 Around others that use e-cigarettes

X

 Previous quit attempts and method

X

 Motivation to quit

X

 Nicotine withdrawal and urge to smoke

X

X

 Any smoking in last seven days

X

X

X

 Any smoking since Quit date

X

X

X

 Lapse and relapse back to smoking

X

X

X

 Biochemical verification in quitters^e

X

Follow-up details

 Quit date verified

X

 Contact details^f

X

X

X

X

X

 Treatment allocation

X

 Date products delivered

X

Use of other cessation methods

 Type of cessation method used

X

X

X

Other outcomes

 Acceptability

X

 Medication use and compliance

X

X

X

 Crossover

X

X

X

X

 Health-related quality of life

X

X

X

 Changes to e-cigarette^a

X

X

X

X

 Dual use

X

X

X

 Continuation of allocated treatment

X

 Adverse events^c

X

X

X

X

 Serious adverse events^c

X

X

X

X

 Cost information

X