Objective To study the clinical features of bronchial asthma of the elderly and the young

to improve the prevention and treatrent.Method To collect 380 cases of bronchial asthma

of which 230 cases were in old age group

150 cases in young group

to investigate the family history

asthma

clinical types

efficacy

prognosis

disease and other co-exist

and to make comparison and analysis.Results Were with 55.33% in yowth group positive family history

30.43% for the older group

the difference was statistically significant（χ2=19.93

P<0.01）;elderly endogenous asthma 60.87%

accounting for the young group of exogenous 66.67%

two types of asthma have a statistically significant difference（χ2=27.54

P<0.01）;old age group

86.97% for patients with other diseases

only 2.67% percent of youth groups exist in other diseases

the severity of the disease in elderly group

often repeated the proportion of attacks

treatment effects worse than the young group

the two groups were statistically significant differences（P<0.05 or P<0.01）.Conclusion Derived within senile bronchial asthma and more severe common

both diseases

and efficacy of poor

high mortality

but other than asthma derived mainly young people

more than a genetic tendency to co-exist very few cases

the disease to light in degree of common

good efficacy

low relapse rate.