Text messaging interventions to support smoking cessation among hospitalized patients in Brazil: a randomized comparative effectiveness clinical trial

Table 2 Abstinence at follow up post-discharge by treatment group

Variables	Sustained care (Intervention) N (%)	Standard care (Control) N (%)	p
Follow-up 30 (missing = smoking)¹
Abstinences for the past 7 days	61 (30.5)	52 (26.0)	0.318
Abstinences for the past 30 days	52 (26.0)	49 (24.5)	0.730
Follow-up 90 (missing = smoking)
Abstinences for the past 7 days	46 (23.0)	54 (27.0)	0.356
Abstinences for the past 90 days	40 (20.0)	48 (24.0)	0.334
Abstinences verified by measurement of exhaled carbon monoxide²	20 (95.2) n = 21	8 (80.0) n = 10	0.160
	M (SD)	M (SD)
Number of cigarettes per day in non-abstinent participants at follow-up 30	9.99 (15.033)	13.91 (14.859)	0.036
Number of cigarettes per day in non-abstinent participants at follow-up 90	10.04 (14.997)	12.51 (12.421)	0.131

M Mean, SD Standard deviation
¹Subjects lost to follow-up were counted as smokers (intention to treat analysis—ITT)
²Participants were characterized as abstinent if their results were ≤ 10 ppm

ISSN: 1756-0500