The phrase "a robust factor in" is correct and usable in written English.
It can be used when discussing an important or significant element that contributes to a particular outcome or situation.
Example: "The research indicates that a robust factor in employee satisfaction is effective communication within the team."
Alternatives: "a significant element in" or "a key contributor to".
Land quality, a composite indicator, was a robust factor associated with farmland abandonment, in contrast to specific factors like soil texture.
In conclusion, EMMPRIN expression in primary colorectal adenocarcinomas was a robust prognostic factor in this patient cohort, and patients in all disease stages with EMMPRIN-negative tumours had an excellent prognosis.
Our findings, coupled with those of other studies, imply that ALDH1A1 alone may not be a robust prognostic factor in breast cancer.
Proliferation has emerged as a robust prognostic factor in ER+ breast cancer (Desmedt et al, 2008; Stuart-Harris et al, 2008; Wirapati et al, 2008).
One MMP-associated candidate biomarker is the metastasis-promoting protein S100A4, and we recently demonstrated that nuclear expression of S100A4 was a robust prognostic factor in colorectal cancer (Boye et al, 2010).
Goldfarb and Iyengar [7] defined asset returns by robust factor models in which the uncertainty was modeled by ellipsoidal sets.
Thus, our empirical findings provide strong evidence for the existence of at least half of an environmental Kuznets curve for deforestation, which appears to be the most robust factor explaining differences in forest cover across countries once geo-climatic factors are adequately controlled for.
In both these two stages, collision process is a very important and robust factor.
A history of substance abuse for example is a robust risk factor for violence amongst psychiatric patients in outpatient settings, but is also a risk factor for violent behaviour within inpatient settings, even where substance abuse prior to violent behaviour can be ruled out [ 13].
We propose that RSFA can be used as a robust scaling factor to control for vascular differences in task-induced BOLD signal, particularly in the context of fMRI studies of ageing.
