The phrase "a rough index of" is correct and usable in written English.
It can be used when referring to an approximate measure or indicator of something, often in a context where precision is not required.
Example: "The number of visitors to the website serves as a rough index of its popularity."
Alternatives: "an approximate measure of" or "a general indicator of".
Creating a rough index of a newspaper's content was not new.
Although there is no simple relationship between brain size and intelligence, a skull's interior volume, when corrected for body size, is taken by paleoanthropologists as a rough index of hominid intellectual capacity.
"Just as a rough index of price changes isn't going to tell you everything about inflation, a single measure isn't going to tell you everything about poverty".Second, the government is concerned as much with future levels of poverty as with current ones.
Serum uric acid and creatinine can be used as a rough index of the glomerular filtration rate (Maita et al. 1984).
High levels of plasma urea and creatinine can be used as a rough index of the glomerular filtration rate and indicates several disturbances in kidney.
It's also reasonable to consider this trend a rough index of entrepreneurial innovation, or more precisely, its impact on job growth.
Given the large number of identified publications, it was not possible to classify the discipline of each one, but a rough index was obtained to estimate the proportion of publications that involved genetic investigations.
Of course, we consider this index as a rough indicator of the status of the Malawi national research for health system and as first step in its assessment.
If you are not certain whether a food is harmful, ask a doctor or look up the food on a glycemic index, which gives a rough idea of its effect on blood sugar (but not its overall healthiness)., which gives a rough idea of its effect on blood sugar (but not its overall healthiness).
