Multivariate statistical analysis enabled the identification of the metabolites whose change in concentration was characteristic of the modification in any of these macroscopic parameters.
Nuclear magnetic resonance (1H NMR) coupled with multivariate analysis (PCA) enabled rapid discrimination among root exudate samples.
To facilitate the interpretation of the large body of data (variables) emerging from these tests we used a powerful principal components (multivariate) analysis that enabled the identification of four 'factors' that account for most (around 77%) of the variance in emotional reactivity between the Gsx- and sham-operated rats.
However, all the variables considered by Sharp et al. were examined individually, without a multivariate analysis that could enable detection of correlated variance components.
The five retrospective papers [ 3- 5, 25, 26] contain large sample sizes enabling multivariate analysis for mortality ruling out confounders such as age, gender, race, glomerular filtration rate (GFR), C-reactive protein (CRP), season, disease severity and so on.
Insufficient numbers were available in each category to enable multivariate analysis.
Although we tagged a large number of fish, because of all the factors involved the number of fish available for analysis was too low to enable multivariate analysis.
Where data were missing for individual subjects (within the "minimum dataset" constraints outlined above), median values from the final study cohort were imputed to enable multivariate analysis of the complete dataset.
Furthermore, samples were representative of student populations of those countries, and the sample sizes were sufficiently large to enable proper multivariate analysis, including the evaluation of effect modification and subsequent subgroup analyses.
All spectral data processing and image assembly was performed using the CytoSpec software package, which enables spectral processing and multivariate analysis to be carried out on an entire spectral imaging data set, or "spectral hypercube".
