This statistic comes from a survey conducted by the Bureau of Justice Statistics (BJS), a division of the U.S. Department of Justice, which found that on June 30, 2009, the United States housed 203,233 Federal prisoners, 1,326,547 State prisoners, and 767,620 detainees in local jails.
Doctors try to determine if a low red blood cell count is caused by increased blood loss of red blood cells or from decreased production of them in the bone marrow. Knowing whether the number of white blood cells and/or platelets has changed also helps determine the cause of anemia.
Bone marrow production of platelets or those that increase platelet destruction in the blood and/or spleen can cause a low platelet count. Thrombocytopenia is a common manifestation of cancer, because sometimes the cancer and drugs used to treat the cancer affect platelet production in the bone marrow.