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for many health problems a combination of primary secondary and tertiary interventions are needed to achieve a meaningful degree of prevention and protection. however as this example shows prevention experts say that the further “upstream” one is from a negative health outcome the likelier it is that any intervention will be effective.
primary secondary and tertiary sources. sources of information or evidence are often categorized as primary secondary or tertiary material. these classifications are based on the originality of the material and the proximity of the source or origin. this informs the reader as to whether the author is reporting information that is first hand
discover the meaning of primary secondary tertiary and quaternary care in medicine. learn about these levels of care and how they affect you. discover the meaning of primary secondary tertiary and quaternary care in medicine. learn about these levels of care and how they affect you.
definitions of primary secondary and tertiary. various professional fields treat the distinction between primary and secondary sources in differing fashions. some fields and references also further distinguish between secondary and tertiary sources. primary secondary and tertiary sources are broadly defined here as follows:
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the primary secondary and tertiary sectors represent various business types and the goods they produce and sell. it's easiest to think of them as a chain of production from extracting the materials (primary) through manufacturing (secondary) and finally to servicing the end consumers (tertiary).