Table 3 Univariable logistic regression analyses for responders-only point prevalence and 6-month continuous abstinence

Variable

n/N^a

OR (95% CI for OR)

p

Gender; men vs. women (ref)

81/358 vs. 277/358

0.53 (0.32–0.89)

0.016

Age, years

0.077

 - ≤ 34 (ref)

57/351

1.0

 - 35-49

85/351

1.22 (0.62–2.39)

0.559

 - 50-64

145/351

0.94 (0.51–1.74)

0.844

 - ≥ 65

64/351

0.51 (0.24–1.06)

0.070

Number of smoked cigarettes/day (data journal)

md = 8, q₁ = 0, q₃ = 15, N = 296

0.94 (0.92–0.97)

< 0.001

Number of years of education

md = 12, q₁ = 9, q₃ = 14, N = 354

1.07 (0.99–1.16)

0.067

Number of years smoked before baseline

md = 35, q₁ = 20, q₃ = 43, N = 343

0.99 (0.97–1.00)

0.076

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

121/358 vs. 237/358

4.29 (2.68–6.87)

< 0.001

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

261/335 vs. 74/335

1.37 (0.81–2.31)

0.240

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

197/348 vs. 151/348

1.48 (0.97–2.27)

0.073

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

18/317 vs. 299/317

0.41 (0.14–1.19)

0.102

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

254/348 vs. 94/348

1.79 (1.10–2.92)

0.019

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

md = 9, q₁ = 7, q₃ = 10, N = 346

1.26 (1.13–1.41)

< 0.001

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

md = 7, q₁ = 4, q₃ = 9, N = 345

1.22 (1.13–1.33)

< 0.001

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

md = 10, q₁ = 5, q₃ = 10, N = 347

0.98 (0.91–1.04)

0.476

Variable

n/N^a

OR (95% CI for OR)

p

Gender; men vs. women (ref)

81/358 vs. 277/358

0.62 (0.36–1.07)

0.087

Age, years

0.070

 - ≤ 34 (ref)

57/351

1.0

 - 35-49

85/351

1.50 (0.75–2.99)

0.254

 - 50-64

145/351

1.00 (0.53–1.91)

0.991

 - ≥ 65

64/351

0.57 (0.26–1.25)

0.160

Number of smoked cigarettes/day (data journal)

md = 8, q₁ = 0, q₃ = 15, N = 296

0.94 (0.91–0.97)

< 0.001

Number of years of education

md = 12, q₁ = 9, q₃ = 14, N = 354

1.06 (0.98–1.15)

0.145

Number of years smoked before baseline

md = 35, q₁ = 20, q₃ = 43, N = 343

1.00 (0.98–1.01)

0.572

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

121/358 vs. 237/358

5.28 (3.28–8.49)

< 0.001

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

261/335 vs. 74/335

1.87 (1.04–3.37)

0.037

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

197/348 vs. 151/348

1.28 (0.82–2.00)

0.278

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

18/317 vs. 299/317

0.21 (0.05–0.93)

0.039

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

254/348 vs. 94/348

1.53 (0.92–2.56)

0.103

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

md = 9, q₁ = 7, q₃ = 10, N = 346

1.39 (1.21–1.59)

< 0.001

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

md = 7, q₁ = 4, q₃ = 9, N = 345

1.29 (1.18–1.41)

< 0.001

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

md = 10, q₁ = 5, q₃ = 10, N = 347

0.96 (0.90–1.03)

0.264