The study, the longest-running of its kind, showed the rate of hospitalized cases dropped 41 percent in the three years after the ban of workplace smoking in Pueblo, Colo., took effect.

• 这研究是此类研究中研究时间最长的，它显示了自科罗拉多州的普韦布洛在公共场合施行禁烟令后的三年内心脏病发作住院病例率下降了41%25。