Farrington, C. P.
(2004).
Control without separate controls: evaluation of vaccine safety using case-only methods.
Vaccine, 22(15-16)
pp. 2064–2070.
Abstract
Epidemiological methods involving only cases are reviewed in the context of vaccine safety studies. These methods include some ecological methods, case-coverage methods, case-crossover and self-controlled case series methods. The properties of the methods are described using examples from the literature. It is argued that such methods, and in particular the self-controlled case series method, are powerful epidemiologic tools meriting the same attention as more traditional cohort and case–control methods.
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