Report: Emotions contribute most to sleep troubles

People living in small cities generally enjoy better sleep than those in larger ones in China, and negative emotions are the biggest contributor to sleep disorders, according to a report released ahead of World Sleep Day, which fell on Monday.

The China Sleep Quality Index 2016, released at the weekend by consultant firm Dataway, together with a leading mattress producer, Sleemon, also showed that negative emotions were a major obstacle to quality sleep for people in China.

The research was based on feedback between January and March to online questionnaires sent to netizens in 30 provinces, municipalities and autonomous regions, Dataway said.