Invalid certification of young deaths.

Certification of deaths attributable to epilepsy.

OBJECTIVE To estimate the number of sudden unexpected epilepsy deaths occurring annually in England and Wales in those 16-50 years of age. METHODS All 1997 death entries mentioning epilepsy as a cause of death in those 16-50 years were examined and classified as sudden unexpected death in epilepsy (SUDEP), other epilepsy related deaths, or non-epilepsy deaths. RESULTS 612 death entries were...

Invalid Recipes

Invalid measurement validity.

Concurrence looks at how a measure relates to a gold standard. If, as frequently occurs, there isn’t one, the next best is the correlation with other established measures. This assumes that the latter are themselves valid, which may not be true, and risks stifling innovation, a source of concern if a paper is criticized on this ground. More straightforwardly, concurrence also means that a test ...

Certification of deaths from diabetes mellitus and obesity in England: trends into the twenty-first century.

BACKGROUND Most cases of Type 2 diabetes are attributable to excess weight and physical inactivity. We investigated trends in mortality based on doctors' certification of diabetes and obesity. METHODS Analysis of a national data set of all certified causes of death, i.e. underlying cause and contributing causes ('mentions'), in England 1995-2010. RESULTS Diabetes exhibited divergent trends ...

Representing "Just Invalid" Knowledge

Data, information and knowledge are all represented in a single formalism as “items”. Items contain two types of acceptability measures that measure the invalidity of item instances. Objects are item building operators that also contain two types of acceptability measures. These acceptability measures define a graduated acceptability region for data, information and knowledge. This region repre...