Rate of persistent eosinophilia which incidentally founded after a follow up of 2 years in middle aged man

Cho, Jung Jin

Abstract

BACKGROUND: Eosinophilia is associated with distinctive disease processes that include helminthic parasitic infections, allergic diseases and a diversity of diseases of ill defined etiology. But the rate of persistent eosinophilia is not known in incidental eosinophilia without definite diseases such as parasite or allergic diseases.
METHODS
This study included 242 middle aged man who found eosinophilia incidentally in health check up at a general hospital and followed up after 2 years. The man who didn't know eosinophilia and never treated nor worked up for eosinophilia included. We study the persistent rate of eosinophilia after a follow up of 2 years.
RESULTS
In 78% of incidental eosinophilia, the number of eosinophils was less than 1000/mm3. The rate of persistent eosinophilia which incidentally founded after a follow up of 2 years is 29.8%. Higher numbers of eosinophilia, higher rate of persistent eosinophilia. Eosinophil number less than 1000/mm3 showed 23.8% persistent eosinophilia, 1000 1499/mm3 46.3%, 1500 1999/mm3 57.1%, more than 2000/mm3 80% persistent eosinophilia respectively. (P<0.05).
CONCLUSION
Incidental eosinophilia less than 1000/mm3 usually normalized without intervention, so simple observation is recommended.