. Author manuscript; available in PMC: 2014 Sep 19.

Published in final edited form as: Psychol Med. 2009 Jul 23;40(3):441–449. doi: 10.1017/S0033291709990560

Table 3.

Final logistic regression for major depressive episodes assessed subsequent to abstinence at 1 month in an online sample of smokers attempting to quit

	7-day abstinence
	Odds ratio (95 % CI)	Wald (df=1)	p
CES-D at baseline	1.05 (1.03–1.07)	31.49	<0.001
Sex, female		6.13	0.01
Age of regular smoking	1.04 (1.01–1.07)	5.30	0.02
History of depression	3.87 (2.25–6.65)	23.91	<0.001
Abstinence status, not smoking	1.05 (0.77–1.45)	0.11	0.74
Sex × history	0.49 (0.25–0.98)	4.05	0.04
No history	1.62 (1.11–2.37)	6.10	0.01
History	0.81 (0.46–1.42)	0.54	0.46

CI, Confidence interval; df, degrees of freedom; CES-D, Center for Epidemiological Studies – Depression Scale.