While much more common among elderly than young, it's not very common. For people>85 y/o, the incidence is 50 over 100000. For people<50 y/o, the incidence is less than 1 over 100000. reference:(Page on nih.gov) It's easy to check some common causes of anemia by blood sampling, and to reach the guess of lazy bone marrow, you must ruled out these common causes first. read more
Older adults with several chronic illnesses often require multiple medications. As a matter of fact, 40% of older adults use 5 or more medications weekly; 12% use 10 or more medications weekly. Some common medications can suppress the bone marrow, causing anemia. read more