Raised in
- Myelofibrosis
- Leukemoid reactions
- Polycythemia rubra vera
- Infections
- Steroids, Cushing's syndrome
- Pregnancy, oral contraceptive pill
Low in
- Chronic myeloid leukemia
- Pernicious anemia
- Paroxysmal nocturnal hemoglobinuria
- Infectious mononucleosis