The phrase "a constant impact on" is correct and usable in written English.
It can be used to describe an ongoing or unchanging influence that something has on another thing or situation.
Example: "The new policy has a constant impact on employee morale and productivity."
Alternatives: "a continuous effect on" or "an ongoing influence on".
This assumption implies that the factors investigated have a constant impact on the hazard over time.
The Cox model relies on the proportional hazards (PH) assumption, implying that the factors investigated have a constant impact on the hazard - or risk - over time.
This model relies on a fundamental assumption, the proportionality of the hazards, implying that the factors investigated have a constant impact on the hazard - or risk - over time.
As expected, the values of the input parameters had a constant impact on the model's results over time and space, with only few exceptions.
Recently, Goodwin et al (2012) reported on a constant impact of obesity on distant recurrences over time.
This model can describe survival time in function of a multitude of prognostic factors [ 11], under the fundamental assumption of the proportionality of hazards, in other words that the examined factors will have a constant impact over time on the risk of death.
While the fitness benefits of jumping rope are even debatable (constant impact on the legs isn't a good thing), you can actually work up a good sweat in a few minutes — that is if you don't get tangled up repeatedly.
Today, this concern — notably in France — often relates to Iran because the allies, as the book asserts, play a minor fighting role in the war in Afghanistan that is without constant impact on their domestic politics.
Mr Strange added: "His talent was second to none and his constant impact on music, fashion, and art will be sorely missed.
Moreover, we can also reasonably say that TLOC could also represent the first component in the case of all systems since it has the most constant impact on the first factor F1 (significantly correlated to the first component in the case of all considered systems).
More importantly the organization makes a constant local impact.
