# Contextual measures were derived using postal code information, from which indices at the relevant level of aggregation could be geocoded; SEIFA, Socio-Economic Indexes for Areas; LGA, Local government area.
However, many simple methods, from which indices can be derived, have been assessed and validated e.g. homeostasis model assessment (HOMA), quantitative insulin sensitivity check index (QUICKI).
A reciprocal relation exists between the HF and LF rhythms from which an index characterising the SNS PNS balance can be derived.
In this article, the complex left ventricle (LV) shape and motion of 50 RT3datasetsets are represented by novel 4-D descriptors — 4-D sphericity, volume and shape, from which novel indices were derived by principal component analysis (PCA) and subsequently analyzed by a support vector machine (SVM) classifier to assess their capability of LVMD characterization and CRT outcome prediction.
The increase in the number and size of cells attached to the electrode sensors leads to increased impedance, from which derive the cell index (CI) values displayed at the plot, reflecting changes in cell viability.
This index is derived from the Handedness Index [45], which has also been used in studies on auditory laterality (e.g. [26], [27]).
In critically ill patients, many CCR-related parameters (oxygen consumption, stroke work, cardiac power …) have been studied, most of which are derived from cardiac index (CI) magnitude during a dobutamine test [ 6].
The most common are the KC prediction index (KPI), which is derived from eight quantitative indices and the KC Index (KCI %) itself derived from the KPI and four other indices [ 42], and the KISA % which is based on keratometric value, inferior-superior asymmetry (I-S), asymmetric bow-tie astigmatism (AST), and skewed radial axis (SRAX) values [ 43].
While education grouping was on an absolute basis i.e. the highest level of education attainment, irrespective of country of residence wealth quintiles were derived from the asset index, which scored the relative position of each household comparing to others within each country.
The cutoff value was 0.85 for survival and metastasis, which was derived from the Youden index.
The result of the 70-gene signature is presented as a binary result (good or poor prognosis), which is derived from an index-score (−1 to 1) [ 9, 10].
