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عمومی::
مطالعه مورد – شاهدی
Source attribution using systematic review of case-control studies
Case-control studies of sporadic infections are the most commonly applied approach for identifying possible exposures for sporadic foodborne disease includ- ing salmonellosis.
Numerous case-control studies of sporadic infections of diseases commonly transmitted through food have been published, as reviewed by [78,79], and case- control studies are considered a valuable tool to identify potential risk factors for human infections, including sources and predisposing, behavioral, or seasonal factors [80].
Limitations of case-control studies include misclassification due to immunity, which may reduce attributable risk or even suggest protection.
A systematic review (SR) of published case-control studies of sporadic infec- tions can, in addition, provide an overview of the relevant exposures and risk fac- tors and may identify geographical, temporal, or age-related differences regarding the most important exposures [60].
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