About 14 in 100 interviewees go to bed after midnight, 15 percent find it very hard to drift into sleep, and more than 55 percent of the respondents have to resort to extraordinary measures to fall asleep, such as listening to soft music, reading a book, etc.
Bad moods, physical diseases and psychological pressure are the most important factors that influence people's sleep quality.
Among all the respondents, more than 66 percent of women said that bad moods impact their sleep negatively, 2 points higher than male respondents.
About 70 percent of city residents consider bad moods as one of prime causes of bad sleep, while in rural areas, the ratio is only 62 percent.
About 48 percent of respondents said that they cannot sleep well due to chronic diseases; about 65 percent believe that sudden illnesses influence their sleep, such as cold and diarrhea.
Young people are more likely to have sleep problems, mainly because of pressure at work, the report said.
About 62 percent of young people said that work pressure was the main reason behind their poor sleep quality. Among middle-aged people, the rate is 54 percent, and among the elderly, the rate is only 21 percent.
The higher the education and income levels, the more likely people will have poor sleep, the report said.
"People know sleep is important, but they may not be aware that they are experiencing bad sleep," said Ye Jingying, a sleep specialist at the Beijing Tongren Hospital.
"If one wakes up frequently during the night, or always feels groggy during the day, he should pay attention to his sleep patterns," Ye said.
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