TAIPEI: More than one in five people in Taiwan suffer from insomnia likely caused by stress due to the economic woes, a figure higher than the global average, researchers said yesterday.

A survey of 4,005 people found that 21.8 percent of the population has chronic trouble falling asleep or staying asleep, said Lee Hsin-chien, psychiatry chairman at the government-run Shuang-Ho Hospital in Taipei.

Overseas, on average 10 to 15 percent of the population report insomnia, he said, while Taiwan's rate was about 10 percent in 2000.

Stress due to recession on the export-reliant island earlier this year may have contributed to the increase, Lee said.

Diabetes, hypertension, anxiety and depression may also be driving insomnia as health generally declines in the face of an increasingly Western lifestyle, he added.

Earlier this year, Taiwan was the fourth Asian economy after Japan, Hong Kong and Singapore to enter recession in the face of the global financial crisis and a collapse in demand for the region's exports.

The state of the economy prompted employers to lay off workers or require unpaid leave.

"We expected the rate to be high but not that high," Lee said. "A lot of factors come into play. It's possibly stress, or it could be people's health quality."

Lee led the fourth survey commissioned by the Taiwan Society of Sleep Medicine, which was conducted via telephone in October. He said health professionals in Taiwan were considering a 2010 survey using written questionnaires to determine underlying causes of the 2009 results.

China Daily/Reuters

(HK Edition 12/10/2009 page2)