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Update: 2010/07/02 19:39 (Central News Agency Reporter Zhang Fangming, Tokyo Special Report)
A large-scale survey conducted by a research team from the medical department of a Japanese university on junior high and high school students in Japan revealed that using mobile phones before bedtime increases the risk of sleep disorders.
The research team, led by Professor Oida Takashi, presented the survey findings at the regular academic meeting of the Japan Sleep Society held in Nagoya on the 1st. The report indicated that junior high and high school students who use mobile phones before bedtime face a risk of sleep disorders approximately 1.4 times higher than those who do not use phones.
The research team conducted a questionnaire survey from October 2008 to March 2009, involving over 40,000 students from 92 junior high schools and over 55,000 students from 80 high schools nationwide, to obtain these results.
The survey found that among high school students, 35% of boys and as high as 45.8% of girls used their mobile phones for an average of more than two hours per day over a month. Additionally, 18.9% of boys and 27.8% of girls sent text messages before bedtime, while 11.2% of boys and 12.5% of girls made phone calls.
The survey showed that students who used mobile phones to send text messages or make calls before bedtime had a risk of sleep disorders approximately 1.4 times higher than those who did not use phones. Sleep disorders included difficulty falling asleep, waking up in the middle of the night and being unable to fall back asleep, or waking up too early.
The survey also revealed that students who used mobile phones for calls before bedtime were 1.17 times more likely to experience severe daytime sleepiness compared to those who did not use phones, while those who sent text messages before bedtime were as much as 1.5 times more likely to feel severely sleepy during the day.
Source: http://tw. news. yahoo. com/ article/ url/ d/ a/ 100702/ 5/ 28k1y. html
Phone Use before Bed Raises Sleep Disorder Risk
A large-scale survey conducted by a research team from the medical department of a Japanese university on junior high and high school students in Japan revealed that using mobile phones before bedtime increases the risk of sleep disorders.
The research team, led by Professor Oida Takashi, presented the survey findings at the regular academic meeting of the Japan Sleep Society held in Nagoya on the 1st. The report indicated that junior high and high school students who use mobile phones before bedtime face a risk of sleep disorders approximately 1.4 times higher than those who do not use phones.
The research team conducted a questionnaire survey from October 2008 to March 2009, involving over 40,000 students from 92 junior high schools and over 55,000 students from 80 high schools nationwide, to obtain these results.
The survey found that among high school students, 35% of boys and as high as 45.8% of girls used their mobile phones for an average of more than two hours per day over a month. Additionally, 18.9% of boys and 27.8% of girls sent text messages before bedtime, while 11.2% of boys and 12.5% of girls made phone calls.
The survey showed that students who used mobile phones to send text messages or make calls before bedtime had a risk of sleep disorders approximately 1.4 times higher than those who did not use phones. Sleep disorders included difficulty falling asleep, waking up in the middle of the night and being unable to fall back asleep, or waking up too early.
The survey also revealed that students who used mobile phones for calls before bedtime were 1.17 times more likely to experience severe daytime sleepiness compared to those who did not use phones, while those who sent text messages before bedtime were as much as 1.5 times more likely to feel severely sleepy during the day.
Source: http://tw. news. yahoo. com/ article/ url/ d/ a/ 100702/ 5/ 28k1y. html