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Table 3 Logistic regression showing factors associated with self-reported smoking cessation for at least 30 days at 12-month follow-up

From: A smoking quitline integrated with clinician counselling at outpatient health facilities in Vietnam: a single-arm prospective cohort study

  Odds of self-reported cessation at 12 months
  Model 1 Model 2
AIC 192.903 273.855
Variables included in the model Adjusted odds ratio (95% CI) Adjusted odds ratio (95% CI)
Age, years 0.99 (0.95 – 1.04) 1.00 (0.96 – 1.04)
Highest level of education attained
 Lower secondary and less* Reference  
 Upper secondary 0.41 (0.16 – 1.04) 0.63 (0.31 – 1.30)
 University degree, or equivalent, or higher 0.87 (0.27 – 2.76) 1.09 (0.42 – 2.81)
 Average number of cigarettes/days 1.03 (0.98 – 1.08) -
Fagerström Test for Cigarette Dependence
 Low (< 4) Reference -
 Moderate (4–6) 1.44 (0.42 – 4.89) -
 High (7–10) 0.36 (0.09 – 1.46) -
 Years smoking (for each additional year) 0.99 (0.94 – 1.04) 1.01 (0.97 – 1.04)
 Ever attempted to quit in the past 1.39 (0.50 – 3.85) 1.29 (0.62 – 2.66)
 Drink alcohol every day 1.11 (0.47 – 2.59) 1.35 (0.71 – 2.58)
 Drink caffeinated drinks every day 0.62 (0.24 – 1.61) 0.74 (0.37 – 1.50)
 Living with at least one other smoker 1.22 (0.41 – 3.63) 0.92 (0.42 – 1.99)
Reasons given to quit (Yes vs. No)
 Personal health condition 0.47 (0.06 – 3.57) 1.17 (0.22 – 6.28)
 Family’s health 0.69 (0.13 – 3.64) 2.08 (0.68 – 6.38)
 Expense 0.21 (0.02 – 2.62) 0.20 (0.02 – 1.84)
 Advised to quit by referral doctor 1.23 (0.31 – 4.89) 1.36 (0.46 – 4.00)
 Received written material from referral doctor 0.97 (0.40 – 2.35) 0.83 (0.44 – 1.56)
Days from baseline to target quit date
 14 days or more, or did not decide a target quit date Reference Reference+
 Less than 14 days 1.75 (0.69 – 4.43) 2.23 (1.06 – 4.67)
Number of successful counselling phone calls completed by Quitline (maximum 8 calls offered)
 5 calls or less Reference Reference
 6 – 7 calls 7.46 (1.53 – 36.24) 3.86 (1.28 – 11.67)
 8 calls 12.17 (2.87 – 51.69) 6.98 (2.50 – 19.49)
  1. *Combined due to small numbers in less than primary and primary levels
  2. Statistically significant (p < 0.05)