The phrase "a robust proxy for" is correct and usable in written English.
It can be used when discussing a substitute or stand-in that effectively represents or indicates something else, often in a statistical or analytical context.
Example: "In this study, we found that income level serves as a robust proxy for overall well-being in the population."
Alternatives: "a strong indicator of" or "a reliable substitute for".
The paired analyses of the Mg/Ca ratio and oxygen isotopic composition (δ 18Oc) of surface-dwelling planktonic foraminifera have become a widely used method for reconstructing the oxygen isotopic composition of ambient seawater (δ 18Osw) as a robust proxy for surface salinity.
Recent work has demonstrated that thermal remote sensing estimates of surface radiometric temperature provide a complementary source of land surface information that can be used to define a robust proxy for root-zone (top 1 m of the soil column) soil moisture availability.
The title and abstract recapitulate the content of articles and provide a robust proxy for the full text [40].
According to this approach, a genetic variation (e.g., apoE) that serves as a robust proxy for an environmentally modifiable exposure (e.g., serum cholesterol level) can be used in order to make causal inferences about a disease [ 12].
As a robust proxy for replication timing, we divided the genome into three equal parts: (i) Early, (ii) Middle and (iii) Late replicating regions by splitting on the tertiles of the observed distribution.
However, outcomes do represent a robust proxy measure of the urgency of the patient condition in the ED.
In other words, measures such as knowledge that N2O is a GHG may not be robust proxies for overall beliefs about whether climate change is occurring and what its causes are.
A letter is a proxy for your self.
When his alarmism over the Y2K computer bug turned out to be wrong, for example, it made him realise that his own personal computer was a poor proxy for the world at large, which is "modular, shockproof and robust".
