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Table 4 Results of hierarchical logistic regression modeling to predict smoking in the presence of children at home

From: Factors associated with parental smoking in the presence of school-aged children: a cross-sectional study

  Model 1 Model 2 Model 3 Model 4 Model 5 Model 6
Predictors OR 95% CI OR 95% CI OR 95% CI OR 95% CI OR 95% CI OR 95% CI
RTFR 0.92 0.90-0.95 0.93 0.91-0.96 0.93 0.90-0.95 0.93 0.91-0.96 0.94 0.91-0.96 0.94 0.91-0.96
FRSPC    0.98 0.96-1.01         
CESPC    0.94 0.87-1.01         
PSPC    1.02 0.97-1.08         
Agreed with smoking bans at home (ref: yes)      1.61 0.59-2.30 1.25 0.62-2.53 1.28 0.62-2.62 1.44 0.69-2.98
Had smoking bans at home (ref: yes)      2.57 1.48-4.46 2.70 1.54-4.74 2.58 1.46-4.57 2.78 1.55-4.99
Daily smoker (ref: no)        1.59 0.80-3.17 1.56 0.76-3.20 1.47 0.72-3.01
Smoked ≥ 20 cigarettes per day (ref: ≤ 19)        1.58 0.84-2.96 1.55 0.82-2.93 1.76 0.89-3.47
Ever considered quitting (ref: yes, in the coming year)             
 Yes, but not in coming year          1.15 0.58-2.25   
No          0.99 0.42-2.33   
Quitting attempts in the preceding year (ref: no)          0.96 0.51-1.80   
Education level (ref: ≥ Baccalaureate)             
 High School            1.11 0.58-2.13
 Junior High School and below            0.86 0.31-2.38
Annual income (ref: ≥ $600,001)             
 <$600,000            1.71 0.92-3.17
−2LL 342.39   336.21 χ2 313.64   305.51 χ2 302.02 χ2 288.69 χ2
Likelihood ratio (model no. vs. model no.)    2 vs. 1 6.18 3 vs. 1 22.57* 4 vs. 3 8.13* 5 vs. 4 3.49 6 vs. 4 16.82*
  1. PSPC, perceptions of smoking in the presence of their children; CESPC, evaluations of the consequences of smoking in the presence of children; FRSPC, family’s anti-smoking responses to parental smoking in the presence of children; RTFR, smokers’ reaction to family’s anti-smoking responses; OR, odds ratio; CI, confidence interval; -2LL, -2 times the log likelihood of the data.
  2. * p < .05.