Table 2.

Quit Attempts and Smoking Abstinence by Study Arm

	BA	NRT	p a	TM	p a	TM + NRT	p a
N (%)/mean [SD]
Overall	N = 39	N = 36		N = 39		N = 39
Quit attempt
≥1 quit attempt(s) ≥24 hours	26 (66.7)	29 (80.6)	.18	33 (84.6)	.070	31 (79.5)	.21
Abstinence
Week 12: 7-day reported abstinence	4 (10.3)	10 (27.8)	.060	10 (25.6)	.086	9 (23.1)	.14
Week 12: CO confirmed abstinenceb	1 (2.6)	3 (8.3)	.29	3 (7.7)	.33	2 (5.1)	.56

Subgroup: ready to quit next 30 days	N = 32	N = 31		N = 33		N = 32
Quit attempt
≥1 quit attempt(s) ≥24 hours	20 (62.5)	26 (83.9)	.062	28 (84.8)	.046	27 (84.4)	.053
Abstinence
Week 12: 7-day reported abstinence	3 (9.4)	10 (32.3)	.033	9 (27.2)	.074	8 (25.0)	.11
Week 12: CO confirmed abstinenceb	1 (3.1)	3 (9.7)	.31	2 (6.1)	.58	2 (6.3)	.56

Subgroup: not ready to quit next 30 days	N = 6	N = 5		N = 6		N = 5
Quit attempt
≥1 quit attempt(s) ≥24 hours	5 (83.3)	3 (60.0)	— c	5 (83.3)	— c	4 (80.0)	— c
Abstinence
Week 12: 7-day reported abstinence	0 (0.0)	0 (0.0)	— c	1 (16.7)	— c	1 (20.0)	— c
Week 12: CO confirmed abstinenceb	0 (0.0)	0 (0.0)	— c	1 (16.7)	— c	0 (0.0)	— c

BA = brief advice; CO = carbon monoxide; NRT = nicotine replacement therapy; TM = text messages; TM + NRT = nicotine replacement therapy and text messages.

^a p values based on chi-square comparing interventions to BA control.

^bExhaled CO ≤9 parts per million captured by Covita Smokerlyzer Micro+pro.

^c p values not calculated due to small numbers.