Survey of smoking prevalence in adults aged 40 years and older in China, 2014 / 中华流行病学杂志

ABSTRACT

Objective Smoking is the most important risk factor for COPD.Understanding the smoking rate,current smoking rate,average age to start smoking and average daily consumption of cigarettes among people aged ≥40 years in China can provide scientific evidence for the effective control and prevention of COPD.Methods Data were from COPD surveillance in China (2014 to 2015) which covered 31 provinces,autonomous regions and municipalities.A total of 75 107 adults aged ≥40 years selected through multi-stage stratified cluster sampling from 125 surveillance sites (county/district) were surveyed by electronic questionnaire during face to face interviews.The smoking rate and other smoking index were estimated by using weighting complex sampling design.Results The smoking rate and current smoking rate were 40.0％ (95％CI38.5％-42.0％) and 31.0％ (95％CI29.7％-32.0％),respectively,among the Chinese aged ≥40 years in 2014.The smoking rate and current smoking rate in males (74.1％ and 57.6％) were much higher than those in females (5.4％ and 4.0％).And the two rates were significantly higher in rural area (41.2％ and 32.4％) than in urban area (38.8％ and 29.5％).The mean age of smokers to start smoking was 20.1 (95％CI19.7-20.5) years.The younger the smokers were,the earlier their average age to start smoking was (The ages to start smoking for smokers aged 40-,50-,60-,≥70 years were 18.3,19.2,20.9 and 23.1 years,respectively).Average daily cigarette consumption of current daily smokers was 18.9 (95％ CI18.1-19.7) cigarettes,and the daily cigarette consumption was higher in males (19.3 cigarettes) than in females (12.5 cigarettes).Conclusion The smoking rate in males aged ≥40 years is high in China.Compared with urban area,the smoking rate in rural area is higher,posing a big challenge for COPD control and prevention.