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  • Diabetes Related Terms
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• Epidemiology Terms

- N -

• Natural History Of Disease

The temporal course of disease from onset (inception) to resolution.



• Necessary Cause

A causal factor whose presence is required for the occurrence of the effect (of disease).



• Nominal Scale

Classification into unordered qualitative categories; e.g.



• Normal Curve

A bell-shaped curve that results when a normal distribution is graphed.



• Normal Distribution

The symmetrical clustering of values around a central location. The properties of a normal distribution include the following: (1) It is a continuous, symmetrical distribution; both tails extend to infinity; (2) the arithmetic mean, mode, and median are i



• Numerator

The upper portion of a fraction.