The phrase "a index based on" is not correct.
It should be "an index based on." You can use it when referring to a specific index that is derived from certain criteria or data.
Example: "The report includes an index based on the performance metrics of each department."
Alternatives: "an index derived from" or "an index created from".
For example, the CDX.NA.HY is an index based on a basket of North American (NA) single-name high yield CDSs.
For example, the SIMD is an index based on a number of social and health indicators, but does not have an environmental component.
The roads are then attributed with an index based on which the critical ones are flagged [1, 32, 33].
Measures of socioeconomic status were education, occupation, and household wealth (an index based on ownership of a number of consumer items, such as a television and car).
In particular, Alghamdi and co-workers used a logistic regression approach to define an index based on eight preoperative variables [ 9].
Based on these results, we hypothesized that the insulin resistance index based on C-peptide levels may be superior to an index based on insulin levels measured during a MTT.
In a corresponding way, decision latitude was measured by an index based on six items, with 6 as the minimum and 24 as the maximum.
We characterize the local structure of the orientation map by computing an index based on the distribution of orientation preferences in a small neighborhood of each cortical point.
Accordingly, we think that an index incorporating C-peptide levels will perform better than an index based on insulin levels.
"The most common index used for adjustable-rate mortgages five years ago was the one-year Treasury bill," Mr. Ben-Ami said, and the most common margin used for mortgages with an index based on the Treasury bill five years ago was 2.75percentt.
