Predictors of smoking cessation among cancer patients enrolled in a smoking cessation program

Figures & data

Table I. Univariate analysis of predictors of abstinence at week 12.

Predictor	Abstinent (N = 63)	Smoking (N = 183)	p
Age (Mean Years)	60.2	54.8	<0.001
Sex			0.15
Female (%)	21.2	78.8
Male (%)	29.7	70.3
Race
European Ancestry (%)	25.9	74.1	1.0
Non-European Ancestry (%)	25.0	75.0
Marital Status
Married (%)	25.0	75.0	0.88
Un-married (%)	26.4	73.6
Education
High School or Less	21.0	79.0	0.08
Bachelor's Degree or More	31.8	68.2
Baseline Cigarettes Per Day (Mean)	16.0	18.1	0.13
Age Started Smoking (Mean Years)	17.7	16.5	0.07
Years Smoked (Mean Years)	40.9	37.7	0.06
FTND (Mean)	3.1	3.2	0.39
Smoke to Alleviate Psychological Distress (Mean)*	21.2	23.1	0.05
Cancer Type
Tobacco-related (%)	16.7	83.3	0.03
Non-tobacco-related (%)	29.9	70.1
Cancer Stage
Stage 1 or 2 (%)	26.0	74.0	0.50
Stage 3 or 4 (%)	31.1	68.9

FTND, Fagerström Test for Nicotine Dependence; p, probability; chi-square test of significance was used for categorical predictors (e.g. age) and ANOVA was used for continuous predictors (e.g. age); * the range = 30 (10–40).

Table II. Univariate analysis of predictors of abstinence at week 27.

Predictor	Abstinent (N = 44)	Smoking (N = 202)	p
Age (Mean Years)	60.7	55.2	0.002
Sex
Female (%)	11.9	88.1	0.02
Male (%)	23.4	76.6
Race
European Ancestry (%)	16.7	83.3	0.49
Non-European Ancestry (%)	20.2	79.8
Marital Status
Married (%)	16.9	83.1	0.74
Un-married (%)	19.1	80.9
Education
High School or Less	15.2	84.8	0.24
Bachelor's Degree or More	21.5	78.5
Baseline Cigarettes Per Day (Mean)	15.5	18.0	0.10
Age Started Smoking (Mean Years)	18.1	16.5	0.05
Years Smoked (Mean Years)	41.3	38.0	0.08
FTND (Mean)	2.9	3.2	0.11
Smoke to Alleviate Psychological Distress (Mean)*	21.6	22.8	0.26
Cancer Type
Tobacco-related (%)	12.8	87.2	0.16
Non-tobacco-related (%)	20.7	79.3
Cancer Stage
Stage 1 or 2 (%)	20.7	79.3	0.71
Stage 3 or 4 (%)	18.0	82.0

FTND, Fagerström Test for Nicotine Dependence; p, probability; χ² test of significance was used for categorical predictors (e.g. age) and ANOVA was used for continuous predictors (e.g. age); * the range = 30 (10–40).

Table III. Logistic regression of week 12 (top) and week 27 (bottom) abstinence.

Predictor of Week 12	OR	95% CI	p
Baseline cigarettes per day	0.98	0.94–1.02	0.25
Treatment Arm (Reference = Placebo)	0.83	0.45–1.55	0.57
Age	1.06	1.03–1.10	<0.001
Smoke to Alleviate Psychological Distress	0.99	0.94–1.04	0.67
Cancer Type (Reference = Tobacco-related)	2.54	1.24–5.20	0.01
Predictor of Week 27	OR	95% CI	p
Baseline cigarettes per day	0.97	0.93–1.01	0.14
Treatment Arm (Reference = Placebo)	0.95	0.48–1.89	0.88
Age	1.04	1.01–1.08	0.03
Age Started Smoking	1.05	0.98–1.12	0.14
Sex (Reference = Male)	0.47	0.24–0.97	0.04

OR, Odds ratio; CI, confidence interval; p, probability; each model included baseline cigarettes per day and treatment arm as covariates.