研究發現 早起的女性患乳腺癌的機率低

Women who are 'morning people' are less likely to develop breast cancer than those who are sharpest in the evening, a study suggests.
一項研究發現，相比在晚間非常亢奮的女性，早起的女性患乳腺癌的機率要低很多。

Research involving more than 400,000 women found 'larks' have a breast cancer risk up to 48 per cent lower than 'night owls'.
共有超過40萬名女性參與的這項研究發現，“百靈鳥”型女性（早起的女性）患乳腺癌的機率比“夜貓子”型女性（晚睡的女性）低48%。

The scientists, led by the University of Bristol, also showed women who slept longer than the recommended seven to eight hours a night increased their chances of a diagnosis by 20 per cent for each extra hour spent asleep.
由布里斯托大學帶頭的科學家們還發現，每晚睡眠時間超過建議的7到8個小時的女性，每多睡一個小時，被診斷出患有乳腺癌的機率就會增加20%。

One explanation may be that those who function better in the morning have slept better and woken earlier.
一種解釋可能是那些早上精力充沛的人睡得更好，醒得也更早。

And those who are sharper in the evening may have had more disrupted sleep, which could affect the risk of cancer.
而那些在晚上精力充沛的人容易睡眠紊亂，這便會增加患癌症的風險。

The researchers believe staying awake later may also have an impact on a woman's body clock, increasing the risk further. This echoes previous studies which found night-shift workers and those exposed to more artificial light at night are at greater risk of cancer.
研究人員認爲，晚睡也會影響女性的生物鐘，從而進一步增加患病風險。這與先前的研究相呼應，之前的研究也發現，夜班工人和那些多在夜間接受人工光照的人患癌症的風險更大。

The research team, who presented their findings at the National Cancer Research Institute conference in Glasgow, analysed women's genes and asked them whether they were a morning or an evening person.
該研究小組在格拉斯哥舉行的國家癌症研究所會議上公佈了他們的發現，分析了女性的基因組成，並詢問了她們是早起的人還是晚睡的人。