别在家里和车里抽烟，也别让客人在家里抽

不花钱，也不占时间。难在要开口，让家人和客人别在家里抽。

2004 年全球有 603,000 人死于二手烟，约占全球死亡的 1.0%，其中 28% 是儿童。把 57 项研究合起来算：吸到二手烟的人得高血压的机会，约为没吸到的人的 1.28 倍（比值比）。心脏病是 1.39 倍，心肌梗死是 1.50 倍，卒中是 1.36 倍。在家里吸到二手烟的风险，高于在家外吸到的

先管家里，因为在家待得久，而且多项研究合起来看，在家吸到的二手烟比在家外危害更大。二手烟造成的健康损失里，61% 落在孩子身上。自己戒烟见本节第 1 条。

Öberg M, Jaakkola MS, Woodward A, Peruga A, Prüss-Ustün A (2011). Worldwide burden of disease from exposure to second-hand smoke: a retrospective analysis of data from 192 countries. Lancet：「603,000 deaths were attributable to second-hand smoke in 2004, which was about 1·0% of worldwide mortality. 47% of deaths from second-hand smoke occurred in women, 28% in children, and 26% in men」，「61% of DALYs were in children」. doi.org/10.1016/S0140-6736(10)61388-8；(2026). The Associations Between Secondhand Smoke Exposure and Various Cardiovascular Diseases: A Meta-Analysis. Nicotine & Tobacco Research：57 项研究，「hypertension (OR: 1.28, 95% CI: 1.15 to 1.40), heart disease (OR: 1.39, 95% CI: 1.28 to 1.50), myocardial infarction (OR: 1.50, 95% CI: 1.17 to 1.84), stroke (OR: 1.36, 95% CI: 1.18 to 1.54)」「Home exposure has a higher risk of CVD than non-home exposure」. doi.org/10.1093/ntr/ntaf111