Etiology, definition

Carretero OA, Oparil S (2000) Essential hypertension. Part I Definition and etiology. Circulation 101 329—335... 

The CDC has not published a specific case definition for intoxication by urticants. However, the general case definition for vesicants states "A case in which a vesicant is detected in biologic samples. The case can be confirmed if laboratory testing is not performed because either a predominant amount of clinical and nonspecific laboratory evidence is present or an absolute certainty of the etiology of the agent is known."... 

It is estimated that approximately 90% of the patients with blood pressure elevation are affected by essential hypertension, which is by definition, hypertension of unknown etiology. Although the mechanisms responsible for essential hypertension remain obscure, extensive hemodynamic studies have now revealed the precise derangements of the systemic hemodynamics of these patients(8). 

Many dietary and environmental factors have been implicated as possible etiologic factors in the development of pancreatic cancer, but no definite causal relationships have been established. The strongest evidence points to cigarette smoking as a risk factor associated with pancreatic cancer (20-24). Occupational exposure to certain chemicals has also been linked to pancreatic carcinoma (25). Others in the high-risk group include stone miners, cement workers, gardeners, textile workers, and leather tanners (17,26). 

Brent, D.A. and Kolko, D.J. (1998) Psychotherapy definitions, mechanisms of action, and relatioship to etiological models./. Abnorm Child Psycholo 26 17—25. 

A poor diet is a major contributing factor to the etiology of chronic diseases such as heart disease and cancer.However, defining what constitutes a healthy diet remains contentious, as it is difficult to definitively ascribe beneficial and detrimental properties to the... 

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