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Table 3 Univariate and multivariate logistic regression analysis of factors associated with smoking cessation success in the first and third month follow upa-f

From: WhatsApp embedded in routine service delivery for smoking cessation: effects on abstinence rates in a randomized controlled study

  Model 1a Model 2b, c
OR (95% CI) OR (95% CI)
First month follow up
 Group, n (%)
  Intervention 29 (65.9%) 2.85 (1.33–6.14)d 3.51 (1.30–9.44)d
  Control (ref) 36 (40.9%) 1.00 1.00
 Social class, n (%)
  Unemployed 1 (9.1%) 0.08 (0.01–0.66)d 0.27 (0.25–2.91)
  Blue collar 27 (51.9%) 0.85 (0.38–1.88) 1.07 (0.39–2.90)
  White collar (ref)f 31 (57.4%) 1.00 1.00
 Depression score, mean (±SD) 5.2 (±2.8) 0.89 (0.80–0.99)d 0.90 (0.78–1.04)
 Quit attempts, mean (±SD) 3.0 (±2.0) 1.39 (1.08–1.79)d 1.32 (0.97–1.78)
Third month follow up
 Group, n (%)
  Intervention 22 (50.0%) 2.34 (1.07–5.09)d 2.50 (1.04–5.98)c
  Control (ref) 27 (30.7%) 1.00 1.00
 Social class, n (%)
  Unemployed 0 (0.0%)e 0.15 (0.02–1.29)e 0.42 (0.04–4.23)e
  Blue collar 25 (48.1%) 1.35 (0.59–3.07) 1.94 (0.77–4.88)
  White collar (ref)f 22 (40.7%) 1.00 1.00
 Depression score, mean (±SD) 4.9 (±2.5) 0.88 (0.78–0.99)d 0.89 (0.78–1.02)
 Marital status, n (%)
  Married 32 (48.5%) 1.90 (0.82–4.38) 1.61 (0.63–4.12)
  Not married (ref) 17 (25.8%) 1.00 1.00
6th month follow up
 Group, n(%)
  Intervention 18 (40.9%) 2.31 (1.03–5.16)d 2.31 (1.03–5.16)d
  Control (ref) 21 (23.9%) 1.00 1.00
  1. aModel 1: Adjusted for age and sex,
  2. bModel 2: Adjusted for age, sex and other variables
  3. cNagelkerke R2 (First month) 0.253; R2 (Third month): 0.213 R2 (Sixth month):0.126
  4. dp < 0.05
  5. eAgresti adaptation was applied due to the presence of zero in a cell [50]
  6. fTwo individuals in the self-employed” class were added to the white collar” class