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With regard to the limited number of patients included, confirmatory validation studies are required.
However, a further, well-designed, confirmatory validation study with a standardized protocol is necessary.
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They appear to be suitable for further confirmatory and validation studies, and show the potential to provide predictive performance for AD.
10 Although confirmatory, this validation study was limited to a small population of surgically resected patients with brief clinical follow-up; thus, the true impact of this biomarker remains unknown.
While the explanatory strength of the factor solution (explaining 83.5% of the pooled variance) using our small sample provides some assurances that the dimensionality of the S-PRT is robust, further confirmatory construct validation is required, preferably using larger samples of patients within particular patient populations of interest.
However, additional confirmatory studies in validation sets will be required in order to actualise the possible benefits illustrated by the results of this study.
Although Hanekamp et al. suggested the natural occurrence of CAP in 2003, it is also important to mention that their findings were not supported by confirmatory analysis and validation data.
However, at the limit of somatic mutation detection with real time PCR technologies, sequencing by Sanger is not suitable as a confirmatory method and validation of results may require a more quantitative sequence variation assay.
What will validation validate?
To cross-validate this approach, the same 33 items were subjected to confirmatory factor analysis in validation sample B. Nearly half of the loadings on the single factor dropped below 0.4 and the proportion of residual correlations rres>|.20| increased from 5.1%to12.0%0%.
Psychometric validation used confirmatory factor analysis, Cronbach's alpha, Pearson's correlation, and construct validity.
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