. Author manuscript; available in PMC: 2010 Feb 1.

Published in final edited form as: Addict Behav. 2008 Oct 11;34(2):197–203. doi: 10.1016/j.addbeh.2008.10.009

Table 2.

Smoking Characteristics

Variable	LS (n = 86)	MHS (n = 286)	p-value (unadjusted)
Cigarettes per day	9.0 (1.7)	24.3 (11.8)	<.01
Years smoking	20.4 (10.4)	21.9 (10.8)	.25
Carbon monoxide (ppm)	15.5 (8.3)	22.9 (13.0)	<.01
Cotinine (ng/ml)	260.6 (178.4)	352.5 (185.6)	<.01
Age at first cigarette	19.0 (6.2)	18.2 (5.7)	.27
Smoking within first 30 minutes (%)^†	71.9	90.2	<.01
Mentholated cigarette (% yes)^†	88.1	79.2	.07
Number of previous quit attempts	4.5 (3.3)	3.7 (3.0)	.03
Motivation to quit	4.4 (0.6)	4.4 (0.7)	.63
Contemplation Ladder	7.6 (2.5)	7.3 (3.0)	.42

Note: LS = 5-10 CPD; MHS = ≥ 11 CPD; ppm = parts per million

^†

p values based on the chi-square statistic.