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Table 3 Log-binomial regression estimates of factors associated with target smoking cessation

From: Differences in spousal influence on smoking cessation by gender and education among Japanese couples

Outcome: target’s cessation after marriage Men (n =708) Women (n =293)
Explanatory variables Risk ratio 95% CI Risk ratio 95% CI
Model 1     
Age     
  20-29 0.85 (0.54-1.33) 1.10 (0.60-2.00)
  30-39 0.65** (0.51-0.82) 0.87 (0.54-1.39)
  40-49 0.76** (0.62-0.94) 0.96 (0.61-4.51)
  50 or older Reference   Reference
Presence of children 1.07 (0.97-1.17) 1.12* (1.01-1.24)
Couple’s educational combinationa     
  LOW & low couple Reference Reference
  LOW & high couple 0.84 (0.58-1.20) 0.84 (0.56-1.26)
  HIGH & low couple 1.11 (0.81-1.53) 0.96 (0.64-1.43)
  HIGH & high couple 1.02 (0.81-1.29) 1.25 (0.93-1.69)
Counterpart’s smoking status     
  Continued smoking Reference Reference
  Quit smoking/Never smoking 2.27** (1.61-3.18) 1.16 (0.90-1.49)
Model 2     
Age     
  20-29 0.85 (0.54-1.33) 1.11 (0.59-2.10)
  30-39 0.65** (0.51-0.82) 0.87 (0.53-1.42)
  40-49 0.76** (0.62-0.93) 0.96 (0.59-1.55)
  50 or older Reference Reference
Presence of children 1.06 (0.97-1.16) 1.13* (1.01-1.26)
Couple’s educational combinationa     
  LOW & low couple Reference Reference
  LOW & high couple 0.75 (0.23-2.43) 0.91 (0.58-1.42)
  HIGH & low couple 1.08 (0.50-2.36) 0.99 (0.62-1.58)
  HIGH & high couple 0.64 (0.26-1.57) 1.32 (0.94-1.85)
Counterpart’s smoking status     
  Continued smoking Reference Reference
  Quit smoking/Never smoking 1.94* (1.12-3.37) 1.55 (0.90-2.65)
Couple’s educational combinationa × counterpart’s smoking status     
  LOW & low × counterpart’s non-smoking Reference Reference
  LOW & high × counterpart’s non-smoking 1.13 (0.33-3.89) 0.94 (0.51-1.74)
  HIGH & low × counterpart’s non-smoking 1.03 (0.44-2.42) 1.16 (0.58-2.32)
  HIGH & high × counterpart’s non-smoking 1.65 (0.65-4.20) 1.48* (1.05-2.08)
  1. Note: **p<.01, *p<.05.
  2. a“LOW & low couple”: Both spouses had low education levels; “Low & high couple”: Target’s educationwas low and counterpart’s was high; “HIGH & low”: Target’s education was high and counterpart’s waslow; “HIGH & high couple”: Both spouses had high education levels.