「残業と憂鬱の関係性」、さてその研究結果は？

The Ageの記事、'Can overtime cause depression?' by Anahad O'Connorから。
(February 7, 2012)

トピックは「残業は憂鬱を引き起こす要因なのか？」その研究結果について。


'Routinely working long hours is associated with a greater risk of depression, studies show.

Routinely putting in extra hours at the office can put a strain on your social life. But can too much overtime cause depression?

Scientists put the question to the test in a study of more than 2,000 white-collar workers. Previous research hinted at a link between long hours and depressed mood, and the researchers, at the Finnish Institute of Occupational Health in Helsinki, wanted to examine the issue in depth.

For about five years, they collected data on British civil servants. All of the workers, whose average age at the start was 47, had no mental health problems at the outset. And the researchers adjusted their results to rule out other risk factors, like socioeconomic status, social support, gender and substance use.

Ultimately, the men and women who routinely worked 11 hours a day or more had more than double the risk of developing depression compared with those who usually worked eight hours or less.'

* put a strain on ...
「...に負担をかける」

* put the question to ...
「その質問を...にかける」

* more than double　...
「２倍以上の...がある」
この場合は、「１日１１時間かそれ以上継続的に働いた男女は、１日８時間かそれ以下働いた人よりも憂鬱になるリスクが２倍以上ある」という意味で使われています。