The phrase "a comparative group of" is correct and usable in written English.
It can be used when discussing a group that is being compared to another group in a study or analysis.
Example: "In our research, we analyzed the results from a comparative group of participants who received the treatment versus those who did not."
Alternatives: "a comparison group of" or "a reference group of".
A comparative group of 51 patients were operated on entirely by experienced operators.
A comparative group of nurses working eight hour days actually increased the number of sick days during the trial by more than 60percentt.
This contrasts with the 35% frequency of PIK3CA mutations in a comparative group of invasive ductal carcinomas of no special type.
The intra-pair GQ correlated well (r=0.90), a finding similar to that of a comparative group of 26 nondiscordant VLBW twin pairs (r=0.87).
Without a comparative group of grafting surgeries using alternative bone material, only limited statements can be made.
Medical and surgical ICU patients who recalled pain and other traumatic situations while in the ICU (27% of 80 patients) had a higher incidence of chronic pain and posttraumatic stress disorder symptoms than did a comparative group of ICU patients [9].
This provided the opportunity of a comparative group to the GPs of potentially more 'informed' practitioners on the specific topic.
Initially, it was a single-arm investigation without a comparative group for the evaluation of a possible placebo response and may confine the interpretation of the results [ 48].
Ideally our study would have a comparative group consisting of osteodental lamina, even though synthetic HA and osteodental lamina are not totally comparable in all respects.
Therefore, because of the lack of a comparative group having fever due to other etiologies, the true accuracy of PCT in ICU patients with CRBSI need to be confirmed in larger studies including more complex patients with fever and systemic inflammation.
Another limitation of our study is the absence of a comparative group or randomized comparison.
