[Smoking and passive smoking in Chinese, 2002].

Objective: To describe the prevalence of smoking, quitting smoke, and passive smoking in different populations by education status, occupation and geographic distribution.

Methods: Surveillance on risk behaviors in 145 disease surveillance points (DSP) was carried out in 2002 by multi-steps random sampling through questionnaires. 16,407 records had been completed with 16 056 used for analysis.

[Comparison of data population-based and from hospital-based injuries].

Objective: To compare data from an epidemiological survey on injuries with a survey conducted in hospitals on injuries in the same areas and to find out the differences and shortcomings of hospital data in describing the feature of injuries in an area.

Methods: Comparing the causes and age distributions of injuries from the two surveys.

Results: The first 4 leading causes of injuries from the population-based survey were mechanical injuries, falls, burns/scalds and traffic accidents while the first 4 leading causes of hospital-based survey were traffic accidents, assault, mechanical injuries and burns/scalds.