Comorbidity
Definition
The presence of co-existing or additional diseases with reference to an initial diagnosis or with reference to the index condition that is the subject of study. Comorbidity may affect the ability of affected individuals to function and also their survival; it may be used as a prognostic indicator for length of hospital stay, cost factors, and outcome or survival.
MeSH classification
- N05.715.350.225
- N06.850.490.687
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Age Factors
Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a c…
Age of Onset
The age, developmental stage, or period of life at which a disease or the initial symptoms or manifestations of a disease appear in an indiv…
Bias
Any deviation of results or inferences from the truth, or processes leading to such deviation. Bias can result from several sources: one-sid…
Causality
The relating of causes to the effects they produce. Causes are termed necessary when they must always precede an effect and sufficient when …
Cohort Effect
Variation in health status arising from different causal factors to which each birth cohort in a population is exposed as environment and so…
Confounding Factors, Epidemiologic
Factors that can cause or prevent the outcome of interest but are not intermediate variables of the factor(s) under investigation.
Source: NIH MeSH 2026 (D015897) — National Library of Medicine, public domain. View official MeSH record ↗