Table 2.

Data from current study mapped against known issues related to non-use of smoking cessation assistance

Studies	Issues related to non-use of smoking cessation assistance
	Treatment-related issues		Patient-related issues						Social-environmental issues
	Cost	Access (eg, delay in getting prescription; GP as gatekeeper)	Lack of awareness or knowledge about assistance (including misperceptions):			Overconfidence in own abilities	Not regarded as appropriate:		Social norms (eg, relating to use of assistance or perception of assistance users)
			Effectiveness/ how assistance works	Safety/side effects/future health/new addiction	Availability (eg, how to get NRT, free or subsidised pharmacotherapy or behavioural support)		For the smoker (eg, not addicted enough; do not like using medications)	For quitting (eg, deals with addiction not behavioural/psychological aspects)
Quantitative
Etter and Perneger 9				✓		✓
Bansal et al 10			✓	✓		✓
Cummings et al 40			✓	✓
Hammond et al 41			✓			✓
Mooney et al 42			✓	✓
Gross et al 11	✓					✓
Shiffman et al 12			✓	✓
Vogt et al 26*			✓
Vogt et al 43†			✓						✓
Borland et al 44				✓
Willems et al 45	✓		✓	✓	✓				✓
Cobb et al 46									✓
Cook-Shimanek et al 30	✓	✓	✓	✓	✓	✓	✓
Qualitative
Vogt et al 26*	✓	✓	✓	✓	✓	✓		✓
Vogt et al 43†			✓						✓
Uppal et al 34			✓	✓	✓			✓
Data from current study	✓		✓	✓	✓	✓	✓	✓	✓

*Vogt et al ²⁶ reported data from two studies, one qualitative and one quantitative

†Vogt et al⁴³ reported data from two studies, one qualitative and one quantitative.

GP, general practitioner; NRT, nicotine replacement therapy.