The concepts and methods used to measure race changed between the Current Population Surveys (CPS) of November 2000 and November 2004. While these changes have no impact on the definition and ...

The energy imparted by ionizing radiation per unit mass of irradiated material. The units of absorbed dose are the rad and the gray (Gy). The rate of disintegration (transformation) or decay of ...

Acute appendicitis is the sudden and severe inflammation of the appendix. It can cause pain in the abdomen, and this pain may occur quickly and worsen within hours. The appendix is a narrow tube that ...

The appendix is a small tube-like organ attached to the end of the large intestine, near where the small intestine meets it. Modern research suggests it plays a role in intestinal health and immune ...

The tabulations reported derive from the November Current Population Survey (CPS), the only nationally-representative source of data on the proportion of the population and sub-populations that ...