Bratwurst Bucyrus, Ohio (which calls itself the "Bratwurst Capital of America") has held the three-day Bucyrus Bratwurst Festival annually since 1967. Bratwurst Bratwurst () is a type of German sausage made from veal, beef, or most commonly pork. The name is derived from the Old High German "Brätwurst", from "brät-", finely chopped meat, and "Wurst", sausage, although in modern German it is often associated with the verb "braten", to pan fry or roast. While sausage recipes can be found as early as 228 AD, the first documented evidence of the "Bratwurst" in Germany dates to 1313 and can be found in
Time-varying covariate of residence. For example, if a person is born at time 0 in area A, moves to area B at time 5, and is diagnosed with cancer at time 8, two observations would be made. One with a length of 5 (5 − 0) in area A, and one with a length of 3 (8 − 5) in area B. Time-varying covariate A time-varying covariate (also called time-dependent covariate) is a term used in statistics, particularly in survival analyses. It reflects the phenomenon that a covariate is not necessarily constant through the whole study. For instance, if one wishes to