The phrase "a suitable control group" is correct and usable in written English.
You could use this phrase when discussing studies or experiments that involve comparing "test" groups to a baseline group. For example, "The results of this experiment were more meaningful after introducing a suitable control group."
Case-control studies start with people with a particular disease (cases) and a suitable control group without the disease and then compare the two groups for their exposure to the factor that is suspected of having caused the disease.
Because the tax credit is non-targeted in Sweden, it is not clear how to form a suitable control group for an analysis based on observational data.
The main difference to our work is that Hunter et al. impose the requirement of a suitable control group averaged and analytically modeled input curve plus a single blood sample in order to estimate the individual area under the input curve.
In the absence of a suitable control group, we compared the observed incidence of achieving 3 or more pregnancies within 1, 3, or 6 months with the predicted likelihoods, based on an average MFR of 20% [15 ]
It should be noted that less than 0.01% of the control group are expected to become centenarians[38], according to previous studies from other populations, and therefore can be considered a suitable control group.
The challenge comes in designing a suitable control group.
Since there were several suitable control group candidates among the 321 OSCE participants, their gender and age were also parallelized (Table 3).
In addition, this study aimed to employ a range of suitable control groups.
Previous studies on the topic, although seminal, were limited by a lack of suitable control groups (i.e., diabetes-free participants) (6) or by the inclusion of only T1DM (7, 21) or T2DM (4, 9, 22) but not both, precluding a side-by-side comparison of periodontal disease progression among participants free of diabetes or with T1DM or T2DM.
As a result, there are no suitable control groups unaffected by the policy which can be used to compare the behaviour of the treatment group.
The most promising candidates could be carried forward from these additional analyses and assayed and tested within a properly powered validation study that includes suitable control groups.
