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Epidemiology of bronchial asthma and asthma control assessment in Henan Province, China.

Zhang W, Chen X, Ma L, Wu J, Zhao L, Kuang H, Huang T, Cheng J, Zhang L, Qi Y, Sun B, Niu H - Transl Respir Med (2014)

Bottom Line: We selected 10 among the 109 cities and districts in Henan province using a multistage stratified cluster random sampling method.A total of 500 households from each city and district were chosen.The classified control levels of patients were as follows: 33.1% controlled, 49.7% partially controlled, and 17.2% uncontrolled.

View Article: PubMed Central - PubMed

Affiliation: Department of Respiratory and Critical Care Medicine, People's Hospital of Henan Province, Zhengzhou University, Zhengzhou, Henan Province China.

ABSTRACT

Background: Prevalence of bronchial asthma, asthma treatment assessment, and estimation of the control level among asthma patients in Henan Province, China are reported in this paper.

Methods: We selected 10 among the 109 cities and districts in Henan province using a multistage stratified cluster random sampling method. A total of 500 households from each city and district were chosen. Approximately 20,000 residents from a total of 5,000 households were randomly selected to answer a questionnaire recommended by the China Asthma Alliance. Asthma patients were asked to answer a detailed questionnaire using the symptom-based guidelines to assess the levels of disease control.

Results: The overall prevalence of asthma was 0.73% ± 0.12%. Urban and rural residents had asthma prevalence rates of 1.1% ± 0.23% (88/7,924) and 0.48% ± 0.12% (57/11,792), respectively. Among the asthma patients, only 33.8% (52) received regular medication, 25% (13) used oral glucocorticoids, and 71.1% (37) used oral theophylline. The classified control levels of patients were as follows: 33.1% controlled, 49.7% partially controlled, and 17.2% uncontrolled. A total of 38.5% and 27.5% of regularly and irregularly treated asthma patients reached controlled level, respectively. The two groups significantly differed in asthma control level.

Conclusion: Asthma prevalence is low in Henan Province, China. Urban residents have higher prevalence of asthma than rural residents do. Patients with asthma receive insufficient medication, resulting in suboptimal asthma control. Improvement in diagnosis and treatment of asthma patients is urgently needed.

No MeSH data available.


Related in: MedlinePlus

Sampling flowchart.
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Fig1: Sampling flowchart.

Mentions: This study used stratified multi-stage cluster random sampling method (Figure 1). Henan Province comprised 109 counties (county level city) and districts. The counties were divided into three groups according to their economic status: high-, middle-, and low-level groups [12]. Districts were divided into two groups according to economic status: high- and low-level groups [12]. Three counties (one county from each group) and two districts (one district from each group) were randomly selected. Two towns were selected in each county, and two streets were selected in each district. Two administrative villages were selected in each township and two communities in each street. Finally, 500 household residents were randomly selected in each administrative village and community. A total of 3,000 households in rural areas and 2,000 households in urban areas were sampled. The sample was weighed to rural areas (2,000 vs. 3,000 subjects) for population in urban areas accounted for 60% of the total in Henan province. Each investigated group comprised field investigators, and survey instructors. Field investigators were trained medical interns and residents. They surveyed each household member using questionnaires. Survey instructors, who were associated chief respiratory physicians and higher-ranking medical practitioners, were responsible for organization, guidance, inspection, and quality control. We adopted the asthma questionnaire recommended by the China Asthma Alliance. The survey included general condition questions, an asthma-screening questionnaire, and a questionnaire for asthma patients. The investigation period was from April 2010 to October 2010.Figure 1


Epidemiology of bronchial asthma and asthma control assessment in Henan Province, China.

Zhang W, Chen X, Ma L, Wu J, Zhao L, Kuang H, Huang T, Cheng J, Zhang L, Qi Y, Sun B, Niu H - Transl Respir Med (2014)

Sampling flowchart.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4215820&req=5

Fig1: Sampling flowchart.
Mentions: This study used stratified multi-stage cluster random sampling method (Figure 1). Henan Province comprised 109 counties (county level city) and districts. The counties were divided into three groups according to their economic status: high-, middle-, and low-level groups [12]. Districts were divided into two groups according to economic status: high- and low-level groups [12]. Three counties (one county from each group) and two districts (one district from each group) were randomly selected. Two towns were selected in each county, and two streets were selected in each district. Two administrative villages were selected in each township and two communities in each street. Finally, 500 household residents were randomly selected in each administrative village and community. A total of 3,000 households in rural areas and 2,000 households in urban areas were sampled. The sample was weighed to rural areas (2,000 vs. 3,000 subjects) for population in urban areas accounted for 60% of the total in Henan province. Each investigated group comprised field investigators, and survey instructors. Field investigators were trained medical interns and residents. They surveyed each household member using questionnaires. Survey instructors, who were associated chief respiratory physicians and higher-ranking medical practitioners, were responsible for organization, guidance, inspection, and quality control. We adopted the asthma questionnaire recommended by the China Asthma Alliance. The survey included general condition questions, an asthma-screening questionnaire, and a questionnaire for asthma patients. The investigation period was from April 2010 to October 2010.Figure 1

Bottom Line: We selected 10 among the 109 cities and districts in Henan province using a multistage stratified cluster random sampling method.A total of 500 households from each city and district were chosen.The classified control levels of patients were as follows: 33.1% controlled, 49.7% partially controlled, and 17.2% uncontrolled.

View Article: PubMed Central - PubMed

Affiliation: Department of Respiratory and Critical Care Medicine, People's Hospital of Henan Province, Zhengzhou University, Zhengzhou, Henan Province China.

ABSTRACT

Background: Prevalence of bronchial asthma, asthma treatment assessment, and estimation of the control level among asthma patients in Henan Province, China are reported in this paper.

Methods: We selected 10 among the 109 cities and districts in Henan province using a multistage stratified cluster random sampling method. A total of 500 households from each city and district were chosen. Approximately 20,000 residents from a total of 5,000 households were randomly selected to answer a questionnaire recommended by the China Asthma Alliance. Asthma patients were asked to answer a detailed questionnaire using the symptom-based guidelines to assess the levels of disease control.

Results: The overall prevalence of asthma was 0.73% ± 0.12%. Urban and rural residents had asthma prevalence rates of 1.1% ± 0.23% (88/7,924) and 0.48% ± 0.12% (57/11,792), respectively. Among the asthma patients, only 33.8% (52) received regular medication, 25% (13) used oral glucocorticoids, and 71.1% (37) used oral theophylline. The classified control levels of patients were as follows: 33.1% controlled, 49.7% partially controlled, and 17.2% uncontrolled. A total of 38.5% and 27.5% of regularly and irregularly treated asthma patients reached controlled level, respectively. The two groups significantly differed in asthma control level.

Conclusion: Asthma prevalence is low in Henan Province, China. Urban residents have higher prevalence of asthma than rural residents do. Patients with asthma receive insufficient medication, resulting in suboptimal asthma control. Improvement in diagnosis and treatment of asthma patients is urgently needed.

No MeSH data available.


Related in: MedlinePlus