Driver sleepiness and risk of car crashes in Shenyang, a Chinese northeastern city: population-based case-control study.

Objective: To estimate the association of driver sleepiness with the risk of car crashes.

Methods: A population-based case-control study was conducted in Shenyang, a northeastern city in China, between November 2001 and July 2002. The case group comprised 406 car drivers involved in crashes, and 438 car drivers recruited at randomly selected sites, and on the day of week, and the time of day when they were driving on highways in the study region during the study period were used as control groups.

[A case-control study on the risk factors for road injury].

Objective: To investigate the risk factors of road injury.

Methods: Case-control study was used. From November 2001 to August 2002, 406 drivers who had 438 drivers who had not experienced a motor vehicle crash in Huanggu district, Shenyang city were recruited by randomly selection on time of day, day of week and site in the same period at same district.