The phrase "a subset of five studies" is correct and usable in written English.
It can be used when referring to a specific group of studies that are part of a larger collection or body of research.
Example: "In our analysis, we focused on a subset of five studies that provided the most relevant data for our research question."
Alternatives: "a group of five studies" or "a selection of five studies".
Response rates and change from baseline scores for citalopram, relative to placebo, were statistically significant in these meta-analyses, each one based on a subset of five studies.
Two additional MA's were conducted with a subset of five studies that contained onset groups and nondiabetic controls (3, 5, 6, 18, 19).
For the validation, a subset of six studies that had similar PK sampling designs was selected.
In a secondary analysis, we estimated protection by BCG against active disease in a subset of six studies that reported development of active tuberculosis during screening.
On a subset of eight studies, they found some evidence for an association between the third trimester TTHM exposure and SGA (OR: 1.01; 95%CI: 1.00, 1.02 per 10 μg/L TTHM).
Interestingly, a subset of two studies addressed add-on treatments for workplace PTSD, which were used to compliment traditional psychotherapies like CBT or EMDR, or to treat clients who had failed to benefit from these treatments.
In this study, a field comparison of a subset of four study sensors showed that despite very different absolute turbidity readings for a given SSC, well correlated and reliable turbidity - SSC ratings were established (as evidenced by r2 coefficients from 0.92 to 0.98).
A subset of five onset studies with matched nondiabetic control subjects was evaluated in two supplemental meta-analyses to determine representative cognitive profiles and the relative magnitude of ES for children with EOD (n = 166) and LOD (n = 322) in comparison with healthy control children (n = 414) (3, 5, 6, 18, 19).
To avoid the disorder general maps being biased by the most frequently studied disorders, which also tended to be studied in the largest primary samples, we included the same number of studies (n = 7) per disorder, by randomly sampling a subset of seven primary studies of those disorders, which had been the focus of more than seven published VBM studies.
This was combined with a subset of nine case study go-along interviews in places deemed therapeutic by the participants themselves, offering deeper insight into the lived experiences and relationships playing out within such places.
Possible examples in this study include: (1) A subset of five proteobacterial strains clearly clustering within the Wolbachia group of reproductive parasites of arthropods (Fig 2).
