????

?? ?????????? ????????? ????
?????? ???? ?? ????? ????? ???? ?? ??????

???? [?] (?? ??????? : prevalence) ??????? ?? ????? ? ???????????? ??? ? ?? ????? ?? ????? ????? ?? ?? ?????? ?? ???? ?? ?? ????? ???? ????? ???? ??????. ??? ???? ?? ?? ????? ????? ????? ??? ?? ?? ???? ???? [? ?] ? ??? ?? ?? ????? ????? ????? ??? ?? ?? ???? ???? [? ?] ???????? ?? ???? ??? ???? ??????? ??????. [?] ??? ????? ???? ??????????? ?????? ?? ??????? ??? ?????? (???? ?? ?????? ?? ??? ????? ?????? ???? ?????????)? ??????????? ??????? ????? ????? ? ????? ?? ?????????? ???? ????????? ???? ???. [?] ????? ?? ???? ??? ? ???? ??? ??? ? ????? ?? ?? ???? (????? ????? ???? ????? ?? ?? ?????? ?? ???? ??????? ??? ?? ?? ?? ????? ????? ????) ? ??? ??? ?????? ????? ????. ?? ???? ???? ??? ?? ???????? ????? ???? ??? ?????? ???????. ?? ??????? ?? ????????? ???? ????? ???? ?????? ???? ???? ?? ???? ???? ???? ??? ?????? ????? ??? ????? ????? ???? ?? ???? ??????? ????? ???? ????? ???? ??????? ?? ??????? ????? ???? ?? ?? ??? ???? ???? ?? ??? ???? ???? ???????. [?]

??????
????? ????? ?? ?????? ???? ?? ?????? ???? ???? = Σ Condition positive / Σ Total population ??? (ACC) = Σ True positive + Σ True negative / Σ Total population
???????? ????????
???? 		???? ???? ???? ????
???? ??? ??? 		Positive predictive value (PPV), ??? ? ??????? = Σ True positive / Σ Predicted condition positive ????? ??? ?????? (FDR) = Σ False positive / Σ Predicted condition positive
????????
???? 		???? ????
???? ??? ??? 		???? ???? False omission rate (FOR) = Σ False negative / Σ Predicted condition negative Negative predictive value (NPV) = Σ True negative / Σ Predicted condition negative
?????? ? ????? (TPR), ??? ? ??????? ? ?????? ? ????? ? probability of detection, ???? ????? = Σ True positive / Σ Condition positive False positive rate (FPR), ??????? ??????? ? probability of false alarm = Σ False positive / Σ Condition negative Positive likelihood ratio (LR+) = TPR / FPR Diagnostic odds ratio (DOR) = LR+ / LR? ?????? ?? ? = 2 · Precision · Recall / Precision + Recall
False negative rate (FNR), Miss rate = Σ False negative / Σ Condition positive ?????? ? ????? (SPC), Selectivity, ?????? ? ????? (TNR) = Σ True negative / Σ Condition negative Negative likelihood ratio (LR?) = FNR / TNR

???????? ?????? [ ?????? ]

????????? [ ?????? ]

  1. ↑ point prevalance
  2. ↑ period prevalance

????? [ ?????? ]

  1. ↑ ≪ ???? ≫ [ ????? ] ??????? ≪ prevalence ≫? ????: ???? ?????????? . ???? ????????? ????????. ???? ???? . ????? ???????? ???? ?????????. ????? : ???????? ????????? ???? ? ??? ????? . ????   ???-???-????-??-?  (??? ??????? ???? )
  2. ↑ Szklo and Nieto, Epidemiology: Beyond the Basics , 71 .
  3. ↑ Penson, Wei and Wei, Clinical Research Methods for Surgeons , 220 .
  4. ↑ Bennett, Jarvis and Brachman, Bennett and Brachman's Hospital Infections , 110 .
  • Penson, David F.; Wei, John T.; Wei, John (2006). Clinical Research Methods for Surgeons (?? ???????). Springer . Retrieved 2013-05-15 .
  • Szklo, Moyses; Nieto, Javier (2007). Epidemiology: Beyond the Basics (?? ???????). Jones & Bartlett Learning . Retrieved 2013-05-15 .
  • Bennett, John V.; Jarvis, William Robert; Brachman, Philip S. (2007). Bennett and Brachman's Hospital Infections (?? ???????). Lippincott Williams & Wilkins . Retrieved 2013-05-15 .
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