Table 4 Univariable logistic regression analyses for point prevalence and 6-month continuous abstinence, including non-responders at follow-up treated as smokers

Variable

n/N^a

OR (95% CI for OR)

p

Gender; men vs. women (ref)

138/612 vs. 474/612

0.62 (0.39–0.98)

0.041

Age, years

0.203

 - ≤ 34 (ref)

122/602

1.0

 - 35-49

150/602

1.49 (0.86–2.56)

0.156

 - 50-64

231/602

1.43 (0.86–2.37)

0.167

 - ≥ 65

99/602

0.90 (0.48–1.71)

0.757

Number of smoked cigarettes/day (data journal)

md = 10, q₁ = 0, q₃ = 20, N = 505

0.94 (0.91–0.96)

< 0.001

Number of years of education

md = 12, q₁ = 10, q₃ = 13, N = 594

1.05 (0.99–1.12)

0.116

Number of years smoked before baseline

md = 32, q₁ = 17, q₃ = 40, N = 575

1.00 (0.99–1.01)

0.957

Smoking the week before baseline; no vs. yes (ref)

171/609 vs. 438/609

4.19 (2.85–6.15)

< 0.001

Passive smoking at baseline; not exposed vs. exposed (ref)

426/573 vs. 147/573

1.64 (1.04–2.57)

0.032

Drug use (NRT, Zyban®, Champix®) the week before baseline; yes vs. no (ref)

308/592 vs. 284/592

1.72 (1.19–2.49)

0.004

Snus use the week before baseline; yes vs. no (ref)

38/552 vs. 514/552

0.39 (0.15–1.02)

0.054

Other support at baseline: yes^b vs. no (ref)

428/600 vs. 172/600

1.73 (1.13–2.66)

0.012

Likelihood of being smoke-free in 1 year (baseline, 1–10)

md = 8, q₁ = 7, q₃ = 10, N = 590

1.23 (1.11–1.36)

< 0.001

Handle stress and depression successfully without smoking (baseline, 1–10)

md = 7, q₁ = 4, q₃ = 9, N = 590

1.22 (1.13–1.31)

< 0.001

Will use pharmaceuticals if necessary (baseline,1–10)

md = 9, q₁ = 5, q₃ = 10, N = 592

0.99 (0.93–1.04)

0.624

Variable

n/N^a

OR (95% CI for OR)

p

Gender; men vs. women (ref)

138/612 vs. 474/612

0.67 (0.41–1.12)

0.127

Age, years

0.144

 - ≤ 34 (ref)

122/602

1.0

 - 35-49

150/602

1.73 (0.95–3.17)

0.075

 - 50-64

231/602

1.45 (0.82–2.56)

0.207

 - ≥ 65

99/602

0.91 (0.44–1.89)

0.801

Number of smoked cigarettes/day (data journal)

md = 10, q₁ = 0, q₃ = 20, N = 505

0.93 (0.91–0.96)

< 0.001

Number of years of education

md = 12, q₁ = 10, q₃ = 13, N = 594

1.05 (0.98–1.12)

0.188

Number of years smoked before baseline

md = 32, q₁ = 17, q₃ = 40, N = 575

1.01 (0.99–1.02)

0.423

Smoking the week before baseline; no vs. yes (ref)

171/609 vs. 438/609

5.41 (3.56–8.21)

< 0.001

Passive smoking at baseline; not exposed vs. exposed (ref)

426/573 vs. 147/573

2.14 (1.25–3.68)

0.006

Drug use (NRT, Zyban®, Champix®) the week before baseline; yes vs. no (ref)

308/592 vs. 284/592

1.54 (1.03–2.31)

0.035

Snus use the week before baseline; yes vs. no (ref)

38/552 vs. 514/552

0.20 (0.05–0.84)

0.028

Other support at baseline: yes^b vs. no (ref)

428/600 vs. 172/600

1.57 (0.99–2.52)

0.058

Likelihood of being smoke-free in 1 year (baseline, 1–10)

md = 8, q₁ = 7, q₃ = 10, N = 590

1.35 (1.19–1.53)

< 0.001

Handle stress and depression successfully without smoking (baseline, 1–10)

md = 7, q₁ = 4, q₃ = 9, N = 590

1.29 (1.19–1.41)

< 0.001

Will use pharmaceuticals if necessary (baseline,1–10)

md = 9, q₁ = 5, q₃ = 10, N = 592

0.97 (0.91–1.03)

0.365