Takagi et al. (2014)

Takagi, D. (高木大資), Kondo, N., Takada, M., & Hashimoto, H. (2014).
Differences in spousal influence on smoking cessation by gender and education among Japanese couples.
日本人夫婦における、性別と学歴による禁煙への配偶者効果の違い
BMC Public Health, 14:1184
doi: 10.1186/1471-2458-14-1184
Background: 
Previous studies have reported that spousal non-smoking has a spillover effect on the partner’s cessation. However, discussion is lacking on the factors modifying that association. We examined whether the spillover effect of spousal non-smoking was associated with the couple’s educational attainment.
Methods: 
We used paired marital data from the Japanese Study on Stratification, Health, Income, and Neighborhood (J-SHINE), which targeted residents aged 25–50 years in four Japanese municipalities. We selected a spouse smoker at the time of marriage (target respondent), and set his/her smoking status change (continued or quit smoking after marriage) as an outcome, regressed on the counterpart’s smoking status (continued smoking or non-smoking) and combinations of each couple’s educational attainment as explanatory variables using log-binomial regression models (n =1001 targets; 708 men and 293 women).
Results:
Regression results showed that a counterpart who previously quit smoking or was a never-smoker was associated with the target male spouse’s subsequent cessation. However, for women, the association between husband’s non-smoking and their own cessation was significant only for couples in which both spouses were highly educated.
Conclusions: 
Our findings suggest that a spouse’s smoking status is important for smoking cessation interventions in men. For women, however, a couple’s combined educational attainment may matter in the interventions.
 
本研究では日本に在住する1,001組の夫婦のペアデータを用いて、配偶者の非喫煙が、もう一方の配偶者の禁煙行動を促進するかどうかが検討された。分析結果から、妻が非喫煙者である男性はその後自分自身も禁煙する確率が高まるのに対して、女性においては、高学歴夫婦のみが夫の非喫煙から影響を受けることが示唆された。