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Fig. 1. The required sample sizes n<sub>PPV</sub> and n<sub>NPV</sub> versus the sample allocation fraction P for the case study. From: Sample size for.

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Presentation on theme: "Fig. 1. The required sample sizes n<sub>PPV</sub> and n<sub>NPV</sub> versus the sample allocation fraction P for the case study. From: Sample size for."— Presentation transcript:

1 Fig. 1. The required sample sizes n<sub>PPV</sub> and n<sub>NPV</sub> versus the sample allocation fraction P for the case study. From: Sample size for positive and negative predictive value in diagnostic research using case–control designs Biostatistics. 2008;10(1): doi: /biostatistics/kxn018 Biostatistics | © The Author Published by Oxford University Press. All rights reserved. For permissions, please

2 Fig. 2. The optimal fraction of cases as a function of the bound on PPV.
From: Sample size for positive and negative predictive value in diagnostic research using case–control designs Biostatistics. 2008;10(1): doi: /biostatistics/kxn018 Biostatistics | © The Author Published by Oxford University Press. All rights reserved. For permissions, please

3 Fig. 3. The number of cases as a function of the bound on PPV.
From: Sample size for positive and negative predictive value in diagnostic research using case–control designs Biostatistics. 2008;10(1): doi: /biostatistics/kxn018 Biostatistics | © The Author Published by Oxford University Press. All rights reserved. For permissions, please

4 Fig. 4. The number of controls as a function of the bound on PPV.
From: Sample size for positive and negative predictive value in diagnostic research using case–control designs Biostatistics. 2008;10(1): doi: /biostatistics/kxn018 Biostatistics | © The Author Published by Oxford University Press. All rights reserved. For permissions, please

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