The phrase "a poor marker of" is correct and usable in written English.
It can be used when discussing the inadequacy of a particular indicator or measure in reflecting the true nature of something.
Example: "The results of the survey were a poor marker of the overall satisfaction of the employees."
Alternatives: "an unreliable indicator of" or "a weak measure of".
While it's true that accuracy and confidence can correlate within a single person's repertoire of recollections, confidence is a poor marker of accuracy when judging a single act of recollection or when comparing across witnesses.
Headache was thus a poor marker of active disease.
The increase in urine output in case of acute kidney injury is a poor marker of the kidney perfusion improvement.
However, it is well known that SCr is a poor marker of early renal dysfunction because its concentration is influenced by numerous non-renal factors [5, 28].
This, however, is a poor marker of disease activity.
It is also compatible with fasting blood glucose being a poor marker of insulin resistance [ 29].
24-h creatinine clearance overestimates GFR in patients with poor renal function and a variety of other glomerular diseases and drugs can make creatinine clearance and serum creatinine a poor markers of GFR estimation [9, 10].
The view that the PaO2 associated with the highest A-a gradient [ 1] is a poorer marker of the chance of exposure to hyperoxemia than the first blood gas measurement [ 2] was not supported by our findings.
This is not in contradiction with the hypothesis that the MMPs signature is a poor marker for prognosis of patients with primary breast cancer [23].
Whilst it is absolutely right that our key aim is to retain and restore vision, we must recognize that visual acuity is a very poor marker of the efficacy of a drug in inflammatory eye disease.
"Actually, blood is a very poor marker" of bacterial diarrhea, said Dr. David M. Goldfarb, a microbiologist at the University of British Columbia who led a recent study of children's diarrhea in Botswana and advocates changing the guidelines.
