The phrase "allowed a comparison" is correct and usable in written English.
It can be used when discussing the permission or opportunity to make a comparison between two or more items, ideas, or situations.
Example: "The study allowed a comparison of the effectiveness of the two teaching methods."
Alternatives: "permitted a comparison" or "enabled a comparison".
This allowed a comparison of the active and inactive conformations of the TSHR TMD.
This allowed a comparison of the three methods by means of their usability and understanding.
This design allowed a comparison of HPA axis functional differences among daughter and mother groups.
This allowed a comparison between the information collected and the established best practice relating to network security.
Including models 1 and 2 allowed a comparison of the models with equivalent analyses based on untransformed VAS values.
Therefore, this CASMI category allowed a comparison of results obtained from pure in silico fragmentation tools with the integration of context metadata and in silico tools.
While the students did that, a pedometer that was given to them beforehand, also measured their steps and allowed a comparison with their own measurement.
This design allowed a comparison based on the economic and environmental factors between the proposed green process and an existing process for the production of precipitated silica.
The generation of an ideal historical fire data set allowed a comparison among different methods of estimating fire frequency and fire cycle in terms of associated bias.
This design also allowed a comparison of lower versus higher intelligent individuals when working on the same tasks (i.e. sample-based medium task difficulty).
These measurements allowed a comparison of the chemical and mineralogical properties of the Wild-2 particles with other types of extraterrestrial materials, including interplanetary dust particles and meteorites.
