Table 1

Electronic nicotine delivery systems systematic review study categories and outcomes

Study categoryOutcomes
Product features

  • Product design

  • Nicotine, propylene glycol, flavouring, particulate matter and other toxicant content

Health effects

  • Effects of:

    • Nicotine

    • Tobacco-related toxicants

    • Non-tobacco-specific toxicants

  • Impact on:

    • Cardiovascular system

    • Lung function

    • Blood count

    • Other physiology

    • Cognition

    • Abuse liability/addictiveness

    • Adverse events

    • Cytotoxicity

Consumer perceptions

  • Awareness

  • Product perceptions

  • Interest

  • Reasons for use

Patterns of use

  • Ever, current and dual use with other tobacco products

  • Initiation/progression

  • Smoking cessation/reduction

  • Use among various groups: general population, youth, young adults, adults, current smokers, former smokers, never-smokers, etc

Marketing

  • Advertisement/promotion prevalence and expenditure

  • Claims and depictions

  • Receptivity to advertising/promotion

  • Marketing channels

Sales

  • Market share/sales volume

  • Retail and online availability

  • Pricing

Policies

  • Federal, state, local and organisational

  • Existing and proposed

  • Public support for policy