BioMed Research International / 2016 / Article / Tab 1

Research Article

Air Pollutants, Climate, and the Prevalence of Pediatric Asthma in Urban Areas of China

Table 1

Demographic characteristics of the children surveyed in the 3rd national childhood asthma survey.

 Full survey (, total)Asthmatic patients ( [% of full-survey population])

Number of patients463,98213,992 (3.02%)
Male241,8118,495 (3.51%)
Female222,1605,089 (2.29%)
Infant (0–2 years)63,7171,127 (1.77%)
Preschool (3–5 years)97,0754,026 (4.15%)
School age (6–14 years)303,2458,429 (2.82%)
Han433,95112,997 (3.00%)
Manchus3,18987 (2.73%)
Zhuang4,136109 (2.64%)
Hui6,574157 (2.39%)
Mongolian1,52029 (1.91%)
Uygur1,78114 (0.79%)
Tibetan4,34622 (0.51%)
Inducing factors(n [% of total asthmatic children])
Respiratory infection12,299 (87.9%)
Climate change7,204 (51.5%)
Exercise3,055 (21.8%)
Clinical features
Cough12,771 (91.3%)
Wheezing10,659 (76.2%)
Asthma attacks per year
1–510,682 (87.7%)
6–101,227 (10.1%)
>10269 (2.2%)
Allergy history
Personal allergies10,143 (72.5%)
Allergic rhinitis7,010 (50.1%)
Eczema/atopic dermatitis4,147 (29,6%)
Urticaria2,683 (19,2%)
Food allergies2,079 (14.9%)
Family history of allergies6,321 (45.2%)
Family history of asthma2,924 (20.9%)
Bronchodilators9,986 (71.4%)
Steroids8,209 (58.7%)
Leukotriene antagonist4,873 (34.8%)
Antiallergic agents6,352 (45.4%)
Antibiotics10,504 (75.1%)

(a) Data from the Chinese Journal of Pediatrics: third-nationwide survey of childhood asthma in urban areas of China, 2013.
(b) Data regarding the frequency of asthma attacks was only available for 12,178 (87%) patients in the asthmatic cohort.
(c) Data pertaining to the prevalence, age, gender, and race of the asthmatic patients is presented as the percentage of the corresponding population in the full survey. For example, 3.51% of all males surveyed met the criteria for an asthma diagnosis.

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