The phrase "a sensitive index of" is correct and usable in written English.
It can be used when discussing a measure or indicator that is particularly responsive to changes in a certain context or variable.
Example: "The unemployment rate is often considered a sensitive index of economic health."
Alternatives: "a responsive measure of" or "a delicate indicator of".
For these reasons, cardiac torsion represents a sensitive index of ventricular performance.
In recent years, the neutrophil-to-lymphocyte ratio (NLR) has emerged as a sensitive index of systemic inflammation that predicts serious complications, such as pulmonary embolism or cardiovascular disease risk [2, 3].
In contrast, the target visual half-field is critical for determining the deciding hemisphere and is a sensitive index of hemispheric specialization, as well as of directional interhemispheric transfer.
Implying cooperation between temporal and frontal areas that support these functions, DfM may be a sensitive index of integrity of cortical areas or neural pathways damaged by focal epilepsy.
Hippocampal signals were recorded since the frequency and power of the theta oscillation is a sensitive index of the degree of forebrain activation [59].
Measurements were limited to hippocampal traces as variations in theta frequency and power are a sensitive index of the level of forebrain activation [34].
Facial expressions have direct, automatic associations with different emotional experiences [59]; thus, they potentially provide a performance measure that is a more sensitive index of both trial-by-trial fluctuations and individual differences in emotional processing.
Heart rate variability (HRV), a surrogate marker of sympathetic and vagal activity, is a particularly sensitive index of the changes in the neural network in response to cognitive requirements.
Tetrodes allow the separation of neurons within such a cluster and therefore may avoid such biases, providing a more sensitive index of neuronal activity that could explain the difference between past studies and the present findings.
Third, our findings suggest that a detailed measurement of hierarchy recall accuracy may be a more sensitive index of relational hierarchy knowledge, than conventional awareness score and should be used in future studies investigating links between awareness and inferential performance.
Renograms proved to be highly variable in mice, such that we decided to test the FUR quantitative approach, which provided a more sensitive index of the extent of renal failure at day 65.
