. 2008 Dec 17;10(5):e54. doi: 10.2196/jmir.1016

Table 3.

Cessation activity between visits

Status at visit		First to second			Second to third			Third to fourth			Fourth to fifth
Status at visit		Status at V1		Status at V2	Status at V2		Status at V3	Status at V3		Status at V4	Status at V4		Status at V5
N		6461		6461	2714		2714	1062		1062	583		583
% of previous wave				27.0			42.0			39.1			54.9
% of total sample				27.0			11.5			4.5			2.5
Average interval (days)			19.3			22.8			28.6			36.2
To prevent relapse
	Quit since last visit	N/A		53.4	64.2		11.8	13.5		5.6	6.2		3.9
	Quit before last visit
	< 1 month	4.8^a		3.5	5.0		52.1	57.8		38.7	44.6		27.6
	≧ 1 month	1.3^a		2.0	2.1		13.1	12.0		38.3	37.2		54.4
Total Quit		6.1		58.9	71.3		77.0	83.3		82.6	88.0		85.9
To recover from relapse
	Relapse < 1 week ago	9.5		14.2	7.9		9.3	5.7		6.2	5.3		4.3
To make a quit attempt
	Relapse ≧ 1 week ago	15.9		4.8	2.9		4.3	2.8		5.6	3.1		6.3
	Failed quit before last visit	N/A		N/A	N/A		2.4	1.7		3.2	1.4		2.6
	New quit attempt	15.9		4.8	2.9		6.7	4.5		9.0	4.5		8.9
	No previous quit attempts	68.4		22.0	17.8		7.0	6.5		2.4	2.2		0.9
Total use to make a new attempt on that wave		84.3		26.8	20.7		13.7	11.0		11.2	6.7		9.8

^aFirst visit refers to time quit, as there is no previous visit.