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Table 4 The multiple regression models about confidence level as to the avoidance of household SHS exposure among third through sixth graders in southern Taiwan, arranged according to survey year and gender

From: Household secondhand smoke exposure of elementary schoolchildren in Southern Taiwan and factors associated with their confidence in avoiding exposure: a cross-sectional study

Order of Entry Mult. R R2 (%) R2 change (%) Sig. change
  Wave 1, Male    
Model 1 0.20 4.1 4.1 Fchange = 3.90, P < 0.001
Model 2 0.23 5.3 1.2 Fchange= 14.10, P < 0.001
Model 3 0.26 6.9 1.6 Fchange = 3.86, P < 0.001
Model 4 0.31 9.4 2.5 Fchange = 30.16, P < 0.001
Model 5 0.35 11.9 2.5 Fchange = 30.56, P < 0.001
  Wave 1, Female    
Model 1 0.26 6.6 6.6 Fchange = 6.13, P < 0.001
Model 2 0.27 7.4 0.8 Fchange = 9.47, P < 0.001
Model 3 0.32 10.3 2.8 Fchange = 6.55, P < 0.001
Model 4 0.35 12.1 1.8 Fchange = 21.29, P < 0.001
Model 5 0.35 12.3 0.3   n.s.  
  Wave 2, Male    
Model 1 0.14 2.0 2.0   n.s.  
Model 2 0.20 3.9 1.9 Fchange = 19.09, P < 0.001
Model 3 0.25 6.1 2.3 Fchange = 4.65, P < 0.001
Model 4 0.28 8.1 2.0 Fchange = 20.67, P < 0.001
Model 5 0.33 10.6 2.5 Fchange = 27.40, P < 0.001
  Wave 2, Female  
Model 1 0.20 4.1 4.1 Fchange = 3.69, P < 0.001
Model 2 0.22 4.8 0.7 Fchange = 7.58, P < 0.01
Model 3 0.28 8.0 3.2 Fchange = 7.19, P < 0.001
Model 4 0.32 10.4 2.4 Fchange = 27.73, P < 0.001
Model 5 0.33 11.0 0.6 Fchange = 6.63, P < 0.01
  1. Model 1: This model included socio-demographic factors
  2. Model 2: The variables included socio-demographic factors and student smoking behavior
  3. Model 3: The variables included socio-demographic factors, student smoking behavior, household SHS exposure, and family smoking
  4. Model 4: The variables included socio-demographic factors, student smoking behavior, household SHS exposure, family smoking, and attitude toward smoking
  5. Model 5: The variables included socio-demographic factors, student smoking behavior, household SHS exposure, family smoking, attitude toward smoking, and knowledge of tobacco hazards