The phrase "an additional indicator of" is correct and usable in written English.
You can use it when you want to suggest that something serves as a further sign or evidence of a particular situation or condition.
Example: "The increase in sales is an additional indicator of the company's growing popularity in the market."
Alternatives: "a further sign of" or "an extra sign of".
Measures of N cycling genes could be used as an additional indicator of soil health to assess potential ecosystem functions.
Akaike's Information Criterion AICC) was used as an additional indicator of comparative model fit.
An absent, asymmetric and/or reduced ureteric jet from the ureteric orifices evaluated by colour Doppler is an additional indicator of obstruction.
We also use the calendar with students' deadlines, which is provided by the StudentLife dataset, as an additional indicator of students workload.
The roughness of galvanic coatings is the result of the alloy deposition and may serve as an additional indicator of the surface development as well as topography [18].
Finally, in the pilot study, the automatically recorded assessment time of each participant was considered as an additional indicator of the function of the technology-based assessment.
In addition, the green fluorescent protein (GFP) was used as an additional indicator for success of transfection.
No information is available of their quality of life prior to their hospital admission, which is expected to be an additional indicator for quality of life after hospitalization.
Monitoring the STM population diversity can provide a useful benchmark for STM surveillance and an additional indicator for the assessment of possible impacts of public health interventions.
The range of the values used in the scenarios is an additional indicator for the sufficient representation of uncertainty (see Figs. 2 and 3 for climate scenarios and supplementary information for socio-economic developments).
The IPAQ sitting question is an additional indicator variable of time spent in sedentary activity and is not included as part of any summary score of physical activity [ 25].
