The phrase "adequate comparison groups" is correct and usable in written English.
It can be used in contexts related to research, studies, or experiments where groups are compared to assess outcomes or effects.
Example: "In order to draw valid conclusions, the study must include adequate comparison groups to evaluate the effectiveness of the treatment."
Alternatives: "sufficient comparison groups" or "appropriate comparison groups".
Studies in this area have often suffered from small sample sizes and lack of adequate comparison groups.
In order to overcome limitations, future researchers are advised to use standardized and objective measurements of sleep, follow-up or longitudinal designs, representative population samples, large sample sizes, adequate comparison groups, as well as comparison groups with other trauma experiences.
Of 64 studies evaluated "only eight had adequate comparison groups".
Second, these studies do not typically include adequate comparison groups [ 14- 16].
It is one of the first trials to examine the effect of interventions on both evidence-based and non-evidence based help seeking using adequate comparison groups.
Previous longitudinal studies of caregivers and bereaved individuals (either retrospectively or without adequate comparison groups) report participant attrition rates around 15% [ 8, 15, 16].
Studies examining sleep in the hemodialysis (HD) population have largely lacked an adequate comparison group.
This required isolating a cohort of 258 patients with 8 or more visits from the intermediate group as an adequate comparison group to the 373 patients with heavy PES use.
However, one study [ 26] used an adequate active comparison group and treatment expectancy was comparably high in intervention and control group at baseline and post-treatment.
An evaluation of the reviewed studies highlighted several key limitations, including (a) inconsistencies in the definition and diagnosis of Internet addiction, (b) a lack of randomization and blinding techniques, (c) a lack of adequate controls or other comparison groups, and (d) insufficient information concerning recruitment dates, sample characteristics, and treatment effect sizes.
These include both the process of attempting to ensure that participants understand the techniques being used, and that efforts are made to ensure that the intervention is delivered as per protocol, and that there is adequate separation from the comparison groups in the intervention delivery.
