Empirical evaluation of the influence of control selection schemes on relative risk estimation : the welsh nickel workers study

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      <subfield code="a">Empirical evaluation of the influence of control selection schemes on relative risk estimation</subfield>
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      <subfield code="a">The objective is to perform an empirical evaluation of the theory that relative incidence rate (RIR) and relative risk (RR) can be directly estimated from case-control studies that have different sampling schemes of controls. The results add empirical support to the theory that the RIR or the RR can be vadidly estimated in case control studies</subfield>
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      <subfield code="g">Vol. 52, nº 7, July 1995 ; p. 489-493</subfield>
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