The phrase "a study that allowed" is correct and usable in written English.
It can be used when discussing research that provided the opportunity for certain findings or insights to be gained.
Example: "The study that allowed researchers to observe the effects of the new drug was groundbreaking."
Alternatives: "a study that enabled" or "a study that permitted".
We conducted a study that allowed us to screen for violence among our patients, with a follow-up for patients who were screened as being victims or perpetrators of domestic violence.
Jessica Grahn of the University of Western Ontario and James Rowe of Cambridge University and the MRC Cognition and Brain Sciences Unit, also in Cambridge, designed a study that allowed them to distinguish between these two possibilities (Grahn and Rowe, 2013).
Therefore, we have designed a study that allows us to investigate and compare the impact of different costimulatory signal domains on CAR-T cells in vivo.
There is the need for a study that allows formation of a model toward determination of the optimum courtyard form and meeting the conditions of comfort by establishing an optimization model taking into consideration the climatic, meteorological differences for each climatic region the specific climatic region requires.
Given that so little is known, we conducted a qualitative study that allowed physicians to express their views in their own words.
Ideally, we would have designed a prospective study that allowed us to examine the impact of food assistance immediately upon starting ART.
We developed a methodology for this study that allowed us to obtain identifying information about the selected sample for mailing purposes, and that also protected the identity of the individual women involved in the research project.
The use of uncorrelated measures of growth for four lifecourse periods is a strength of this study that allowed us to assess the relative importance of parental growth during specific developmental periods.
It is a levitating study that allows the husband to go from his bedroom level to the wine cellar without leaving his desk.
The current development in cognitive radio research is the result of a multidisciplinary study that allows us to analyze different aspects of cognitive radio.
Consequently, a longitudinal study that allows the comparison of the same students at various ages may provide a detailed and accurate account of the various factors that affect learning (White and Arzi 2005).
