The phrase "a markedly higher rate" is correct and usable in written English.
It can be used when comparing rates or levels, indicating a significant difference in measurement or occurrence.
Example: "The study revealed a markedly higher rate of success among participants who received additional training."
Alternatives: "a significantly higher rate" or "a considerably higher rate".
Among these, the Ecuadorian showed a markedly higher rate of natural Leishmania infections.
Gun ownership is associated with a markedly higher rate of gun-related injury to the gun owner and his or her household.
But what is intriguing about the state's Latinos, a new report found, is that young people are retaining Spanish at a markedly higher rate than earlier waves of Latinos.
All 10 loci showed a markedly higher rate of mutation in cases compared with controls.
A separate example here is l-hArg, which is only one methylene group longer than the proteinogenic amino acid l-Arg, but is processed by LTA4H at a markedly higher rate.
Although our data on pituitary hormone deficiency before transcranial surgery was insufficient, the rate of patients with anterior pituitary hormone deficiency after transcranial surgery was 85%, a markedly higher rate compared with similar published cohorts.
Students with a technical orientation award a markedly higher rating to WTs in the landscape than do students studying environmental sciences.
Lobular cancers had a particularly low and cancers with medullary features had a markedly high rate of PTEN deletions as compared to NST cancers.
CONCLUSIONS: The markedly higher rate of surgical revision with the Kock pouch has led to our change in practice in favor of the right colon pouch for continent cutaneous urinary diversion.
In the medical ICU trial [ 6] the markedly higher rate of severe hypoglycemia in patients attenuated the beneficial impact of intensive insulin therapy observed in the surgical ICU trial [ 4].
U.S. and Japanese workers who put in more than 50 hours a week had markedly higher rates of hypertension, a precursor to heart disease.
