Comparison between the modal DNA values of fresh and paraffin embedded samples showed high rate of comparability (64/67, P less than 0.0001).
If the P-value for comparability (Pc) was < 0·05 (two-tailed test) and the 95% CI of OR was exclusive of 1·0, then the result was statistically significant.
The perfusion defect as a marker of infarct size was comparable between NH3 PET studies of the early retention group and Tl SPECT studies of the 24-h engraftment group (37 ± 9%, range 25 53%, for NH3; vs. 38 ± 9%, range 24 55%, for Tl; P = NS), confirming comparability of methods and absence of model-related differences between groups.
Due to hardware component specific influences and factors such as differences in measurement parameters or different analytical software, the comparability with other studies is somewhat limited for P-MRS.
It is also useful in "negative" RCTs where 95% CI (and not p values) gives the precision of the comparability.
To achieve comparability and avoid cutoff problems, we also derived a p-value for all score-based methods using an exact Monte Carlo permutation test [ 18].
Test taker/player freedom in GBAs can "decrease comparability of evidence across players" (Mislevy et al. 2015, p. 26).
The heterogeneity measure for this estimate was low and non-significant (I = 25.9%; p = 0.245) indicating little between study variation and good comparability of pooled populations.
Protein content of pellets and microparticle-free supernatant did not differ in resuscitated patients (MP: 15.54 ± 2.581 versus supernatant: 17.08 ± 2.202 μg/μL, P = 0.6540 (not significant)) and healthy controls, suggesting a comparability of each pellet with its corresponding supernatant.
Within this predefined network, we applied a significance threshold of P < 0.001 (uncorrected) across all imaging modalities, to allow comparability of the results, as previously published (Sperling et al., 2009).
