Effects of timing of initiation and planning on smoking cessation outcomes: study protocol for a randomised controlled trial

Table 1 Study design

		Recommendation to begin implementation of quit attempt immediately
		Randomised sub-group		Already committed
		Yes, begin immediately	No, follow own timetable	Too late to intervene
Structured planning	Yes	IP	CP	XP
	No	IC	CC	XC

Code: I – Immediate implementation; P – structured planning; C – Control: standard QuitCoach; X - ineligible.

ISSN: 1471-2458