Selective Survival

Due to their lower costs and shorter duration, cross-sectional studies have remained a common epidemiologic study design even among the elderly. In these studies, the role of risk factors potentially associated with lower odds of surviving up to old age needs to be interpreted with particular caution, however. For example, the decrease in prevalence of major cardiovascular risk factors at higher ages, such as hypertension, hyperlipid-emia or smoking, or even of certain chronic diseases, may reflect selective survival in addition to rather than changes of risk factors over time which have to be studied longitudinally (Corti et al., 1996).

Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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