The phrase "a restricted subgroup of" is correct and usable in written English.
It can be used when referring to a specific subset of a larger group that has limitations or constraints on its membership or characteristics.
Example: "The research focused on a restricted subgroup of participants who met specific criteria for the study."
Alternatives: "a limited subset of" or "a confined group of".
The novel influenza A H1N1 virus can cause, in a restricted subgroup of infected patients, an acute respiratory failure not responding to conventional treatment.
The IV approach yields estimates of the treatment effect not only in the treated but also in a restricted subgroup of patients for whom the instrument was informative about treatment assignment; these are the so-called "marginal" or compliers.
To examine the effect of carrying the APOE-e4 allele on the association between diabetes and cognitive change over time, APOE-e4 was included as a covariate in a restricted subgroup of 699 individuals without and 36 with baseline diabetes.
Biclustering identified tightly co-expressed gene sets in the tumours of restricted subgroups of breast cancer patients.
Of those 125, 107 observational and preclinical studies, and trials examining nonpharmacologic interventions, cART alone, and restricted subgroups of HIV-infected patients with comorbidities that may contribute to cognitive dysfunction (depression, fatigue, and drug abuse) were excluded.
All other introns are found to be gained or lost only within a single restricted subgroup or in only a single gene.
The rates of low birth weight (5.5%), preterm birth (6.9%) and SGA (7.5%) were substantially lower in Nova Scotia; the rates of these outcomes in the restricted subgroup with more accurate data (77% of live births) were 5.0%, 6.8% and 7.5%, respectively.
The membrane-bound form of IL-18 was recently described to be caspase-1 dependent and restricted to a subgroup of monocytes [ 14].
In summary, this study provides evidence that p14ARF promoter hypermethylation may represent an important cause of deregulation of the p53-MDM2-p14ARF signaling axis in a subgroup of CRCs displaying a restricted overexpression pattern of the p53 protein, associated with the wild-type TP53 gene, concomitant MDM2 overexpression, and normal p21 expression.
The purpose of this study was to investigate whether alteration of p14ARF, a key regulator of p53-MDM2 interaction, plays a role in deregulating the p53 pathway in a subgroup of CRCs exhibiting a restricted pattern of p53 overexpression significantly associated with MSI-H phenotype, low TP53 mutation, and MDM2 overexpression, and inversely correlated with p21 expression loss [ 7].
We thus performed a series of sensitivity analyses where we used different categorizations of time from index MI, performed a restricted analysis within the subgroup of recent MIs (<8 weeks) and, in the complete population, tested interaction terms of time from MI to inclusion and ICD implantation time to study the robustness of the presented results to changes in the statistical approach.
