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有研究报告显示，吸烟人士若在手术前“戒烟4周”，手术后受感染的几率较少。

这项研究报告是由世界卫生组织（WHO)日前所发布，据WHO统计，全球吸烟人数超过10亿人，每年有10分之1的人接受重大手术，在富裕国家中，多达16%的病患会出现严重的并发症，而在开发中国家，手术死亡率高达约10%。

研究报告显示，吸烟人士若在手术前戒烟4周，术后感染较少，而且回医院再接受额外治疗的几率也较低。此外研究还指出，手术前一个月暂时戒烟的病患，在术后6周出现并发症的几率较低。

研究发现，吸烟人士的手术并发症几率是不吸烟者的2倍以上，澳洲烟草研究专家埃斯帕格涅特表示，这不仅对病患不好，也对医院的服务分配不利，因为吸烟者很可能出院后须再次回到医院治疗，导致其他病患可能无法就医。