The distribution of waist-to-height ratios, categorized by sex, is presented in Supplementary Table 1.
S/F ratios categorized by the level of PEEP can be used to impute for P/F ratios in the calculation of the respiratory component of the SOFA score.
Concentrations of IGF-I and IGFBP-3, as well as IGF-I/IGFBP-3 ratio were categorized into sex-specific quartiles, based on the distribution among all controls.
Continuous variables of gene expression ratios are categorized according to the cut off points introduced by receiver operating characteristic curves.
Differentially expressed genes and Z ratios were categorized into known canonical pathways by the Parametric Analysis of Gene-set Enrichment (PAGE).
Right and left ABI were calculated as the ratio of the highest leg pressure to the highest brachial pressure in the corresponding arm, and the lowest of the two ABI ratios were categorized as low (< 0.9), normal (0.9 1.3), or high (> 1.3) for analysis (Ankle Brachial Index Collaboration 2008; McDermott et al. 2005).
Following previous work [ 7], national surgeon and OCOs/nurse practitioner-population ratios were categorized using one quarter of the VISION 2020 target for the Africa region, the VISION 2020 Africa target, and the Asia region target as the first, second and third category boundaries, respectively, and mapped using ArcGIS software, Redlands, California, USA.
In the first step, GeSICA calculates a simple logged ratio to categorize the entire human genome into two different states.
In addition, current ICU practice relies on the PaO2/FiO2 ratio to categorize disease severity despite its inadequacies as a clinical tool being well documented.
For example, a 50% EPP value, calculated from the distribution of the ratio data, categorizes all genes with a 50% or greater chance of being present as conserved (1), and those with a less than 50% chance as diverged (0).
