The phrase "also compared the effect" is correct and usable in written English.
You can use it when discussing research findings or analyses that involve evaluating the impact of something in relation to another factor.
Example: "In her study, she also compared the effect of temperature on plant growth."
Alternatives: "also analyzed the impact" or "also evaluated the influence".
The study also compared the effect of involving men in the use of the method.
We also compared the effect of different biochars on the Planosol, including woodchip biochar, straw biochar, and two vineyard-pruning biochars produced at different pyrolysis temperatures.
We have also compared the effect of bandgap on the efficiency of triple-junction devices.
We also compared the effect size of silver and silica nanoparticles.
Lapied et al.[8] also compared the effect of earthworm exposure via spiked food and via soil, and attributed the absence of effects in the tests with spiked food to avoidance behavior.
Therefore, we also compared the effect of TCR activation on β-catenin levels with that of an alternative inhibitor of GSK3, the ATP-competitor BIO-acetoxime (BIO-ac, also called GSK3 inhibitor X).
To establish an effective clinical treatment for DVH, we also compared the effects of icariin and p-icariin, focusing on their effects on oxidative stress in the pathogenesis of DVH.
We also compared the effects of the different exercise modalities.
In January in the journal PLoS One, the University of Basel team also compared the effects of incandescent bulbs to fluorescents modified to emit more blue light.
We also compared the effects of a single application of untreated winery wastewater, to application of treated winery wastewater (sequencing batch reactor) and pure water to eliminate the effects of wetting alone.
Rauch and Hulsink (2015) have also compared the effects of entrepreneurship and supply-chain management programs.
