一天抽幾支煙更好?干脆抽一包吧！

一天抽幾支煙更好?干脆抽一包吧！

A smoke’s no joke.

吸煙可不是鬧著玩的。

Smoking five cigarettes a day hurts your lungs nearly as much as smoking two packs, according to new research by Columbia University’s Vagelos College of Physicians and Surgeons.

哥倫比亞大學(Columbia University)瓦杰洛斯外科醫(yī)師學院(Vagelos College of Physicians and Surgeons)的最新研究顯示，每天吸五支煙對肺部的傷害幾乎相當于吸兩包煙。

They also found that lung function doesn’t restore itself nearly as quickly as you might hope after quitting smoking.

他們還發(fā)現(xiàn)，在戒煙后，肺功能恢復的速度并沒有你希望的那么快。

For this analysis, scientists looked at the data of 25,352 adults who had their lungs tested at least twice between 1983 to 2014. From there, the researchers zeroed in on their lung function, which is the amount of air a person can breathe in and out.

為了進行這項分析，科學家們查看了25352名成年人的數(shù)據(jù)，這些人在1983年至2014年間至少進行了兩次肺部測試。在此基礎上，研究人員開始關注他們的肺功能，即一個人可以吸入和呼出的空氣量。

They found that lung function in light smokers declines rapidly — closer to that of a heavy smoker than a nonsmoker. If a nonsmoker loses zero milliliters of lung capacity in a year, a light smoker loses around 7.65 milliliters, and a heavy smoker loses 11.24.

他們發(fā)現(xiàn)，輕度吸煙者的肺功能迅速下降——與不吸煙者相比，與重度吸煙者更接近。如果一個不吸煙者在一年內(nèi)喪失了0毫升的肺活量，一個輕度吸煙者喪失了大約7.65毫升，而一個重度吸煙者喪失了11.24毫升。

“Many people assume that smoking a few cigarettes a day isn’t so bad,” study leader Dr. Elizabeth Oelsner, a professor at the college, says in a press release. “But it turns out that the difference in loss of lung function between someone who smokes five cigarettes a day versus two packs a day is relatively small.”

“許多人認為每天抽幾支煙并沒有那么糟糕，”研究負責人、該學院教授伊麗莎白·奧爾斯納博士在一份新聞稿中說。“但事實證明，一天抽五支煙的人與一天抽兩包煙的人肺功能喪失的差異相對較小。”

Medically, their findings suggest that light smokers may be at greater risk for developing chronic obstructive pulmonary diseases — for example, bronchitis (hacking cough) or emphysema (trouble breathing) — than we previously realized.

在醫(yī)學上，他們的發(fā)現(xiàn)表明，輕度吸煙者患慢性阻塞性肺病的風險可能比我們之前認識到的更大，例如支氣管炎(黑客咳嗽)或肺氣腫(呼吸困難)。

They found that quitting does help to preserve lung capacity significantly — by about 8 milliliters per year, compared to that of a current smoker. But lung function doesn’t “normalize,” meaning return to its pre-cigarette baseline, for 30 years.

他們發(fā)現(xiàn)，戒煙確實有助于顯著地保持肺活量——與還在保持的吸煙者相比，每年大約保持8毫升的肺活量。但30年來，肺功能并沒有“正?；?rdquo;，也就是說恢復到吸煙前的基線水平。