What prevalence and demographic information is available for AIHA?
AIHA affects about 1 to 3 people per 100,000 each year. It's most common in females over age 40, though it can occur at any age.
Warm AIHA is the most prevalent form, accounting for 60 to 80 percent of all AIHA cases in adults. It usually occurs between Show Full Answer
What prevalence and demographic information is available for AIHA?
AIHA affects about 1 to 3 people per 100,000 each year. It's most common in females over age 40, though it can occur at any age.
Warm AIHA is the most prevalent form, accounting for 60 to 80 percent of all AIHA cases in adults. It usually occurs between ages 50 and 70, though it can start at any age. While it affects both children and adults, it's more common in adults.
The condition can be classified as primary AIHA (occurring without an underlying cause) or secondary AIHA (associated with other conditions like blood cancers, autoimmune disorders, infections, or medications).
November 24, 2025