Aedrian Abrilla

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Questions related from Aedrian Abrilla

How to statistically compare three dependent means (standard deviations)?

Suppose that I intend to compare the concentration (a quantitative continuous variable) of analyte X in blood, tears and urine. I was able to get all aforementioned specimens from 600 adult...

30 January 2022 4,143 7 View

Does it make sense to do a diagnostic test accuracy meta-analysis of predictive values?

Systematic reviews and meta-analyses of diagnostic test accuracy usually pool sensitivity and specificity estimates. However, for clinical/patient-care purposes, positive and negative predictive...

12 October 2021 4,046 3 View

How to statistically assess association between a variable with two nominal categories and another variable with k > 2 ordinal categories?

Suppose Intervention A and Intervention B are randomly allocated to 50 participants each (n = 100) to compare their efficacy in preventing a condition after a certain time period. Efficacy is...

23 September 2021 1,233 8 View

Can it still be called retrospective cohort study when the data of two groups being compared in the past are from different timeframes?

The impact of an intervention to an outcome of interest was sought to be assessed using retrospective data from two groups of patients - one group exposed to the intervention, the other was not....

29 May 2021 858 3 View

Should both biological and technical replicates be represented in reporting variability of estimates?

In case your answer is "yes," how would you represent them (in terms of weight) in the estimates? The hypothetical scenario is that I have 3 biological setups designed to test the same hypothesis...

31 December 2020 8,878 2 View