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Male Female
< 5 years
5-10 years
11-20 years
>20 years
Multi-specialty hospital
Clinic/ nursing home
Government hospital/ medical college
Mixed
Tier 1 city
Tier 2 city
Tier 3 city
Rural area
Up to 10%
10-30%
30-50%
>50%
Autoimmune cause
Stress
Environmental factors
Food
Heat
Pressure
Medications
Cold
Unknown
Any other
Male
Female
< 5 %
5-10 %
10-20%
>20%
10-20 years
<10%
20-30%
30-40%
40-50%
Start with higher dose of second-generation antihistamine (SGAH) and then down titrate after patient responds
Start with standard dose of antihistamine and then up titrate if patient doesn’t respond
Up to 3 days
5-7 days
1 week
2 weeks
up to 20%
Montelukast
Ranitidine
Dapsone
Methotrexate
Omalizumab
Cyclosporine
< 5 days
7-10 days
>10 days
>40%
Yes
No
10-25%
25-50%
> 50%