The phrase "a second study demonstrated" is correct and usable in written English.
You can use it when referring to findings or results from a second research study that supports or adds to a previous study.
Example: "A second study demonstrated that the new treatment was more effective than the standard approach."
Alternatives: "another study showed" or "a follow-up study revealed".
A first study demonstrated that the bilateral application of 300 μg per nostril, repeated to reach a complete desensitization, induced a significant reduction and disappearance of the attacks, while a second study demonstrated that the application in the ipsilateral nostril is equally efficacious, whereas the application in the contralateral nostril was ineffective [307, 308].
A second study demonstrated that this effect is related to how strongly people wanted their party to win.
A second study demonstrated that neutralization of DLL4 during respiratory syncytial viral infection increased Th2 cytokine production as well 45.
A second study demonstrated that only 25% (2/8) of breast cancer metastases expressing NIS protein had clinically evident radionuclide uptake [ 9].
In addition, while the present article was under preparation, a second study demonstrated independently that 2610029G23Rik escapes X-inactivation in a hybrid Mus musculus × Mus spretus cell line [ 43].
A second study demonstrated that genistein is able to downregulate the levels of the chemokine receptors CXCR4 and CXCL12 when the breast cancer cells were treated with low micromolar concentrations of genistein [ 162].
In the end, Ballestar presented a second study demonstrating an association between Epstein-Barr virus infection and DNA methylation in B cells.
A third study demonstrated that POCUS did not improve upon the already optimal test characteristics of clinical examination alone when physicians were certain of their diagnosis; however, POCUS may be of use in cases of clinical uncertainty [310].
In contrast to this, a fourth study demonstrated that patients treated with sequential compression devices experienced fewer events when compared to a control group (0% vs. 11.1%).
A third study demonstrated the feasibility of a 12 week community based program for out-patient children with any type of cancer.
A third study demonstrated that home-based therapy results in significant improvements in QOL compared with hospital-based therapy in the palliative setting (Payne, 1992).
