Elderly(n=50) Young(n=50) P value
Sex
Males 26 34 NS
Females 24 16 NS
Background
Rural 24 31 NS
Urban 26 19 NS
Marital status
Married 32 38 NS
Unmarried 0 11  
Spouse dead 18 1 0.0001
Symptoms
Daily cough 19 7 0.006
Wheezing 18 5 0.002
History of atopy 29 42 0.004
Age at onset
<40years 8 50 0.0001
>40years 42 0 0.0001
Table 1: