The phrase "and confirmed the same" is correct and usable in written English.
It can be used in contexts where you want to indicate that something has been verified or validated, often in formal or legal documents.
Example: "The witness provided her testimony and confirmed the same during the court proceedings."
Alternatives: "and verified it" or "and affirmed it".
However, we have used two independent methods and confirmed the same 97% consensus as in previous studies.
We reviewed past CT findings and confirmed the same finding since the first scan; however, the size of hernia has not changed (Fig. 2b).
We examined the GFP response to EE2 in three different ERE-TG zebrafish lines and confirmed the same responses across these lines.
The study identified the RA-associated intronic SNP rs1790834 in the CYB5A gene in one GWAS and confirmed the same SNP in our study.
In our study in all cases isolated pathogens from SOB and distal site biopsy, which happened to be the same species and antibiogram were compared using genotyping and confirmed the same strain.
Furthermore, a few overexpression and mutant plants with the AG, SEP3, and FUL fused to eGFP were analyzed for fluorescence and confirmed the same linkage between expression and phenotype.
Update: A report from the analysts at Canalys has just come in, and confirms the same thing – it's an Apple vs. Samsung battle.
Different scientists around the world have tested these ideas independently and repeatedly, and they consistently and accurately predict and confirm the same experimental outcomes.
Now be it known, that I John Adams, President of the United States of America, having seen and considered the said Treaty do, by and with the advice and consent of the Senate, accept, ratify, and confirm the same, and every clause and article thereof.
However, analysis of patients initially diagnosed between 2005 and 2012 confirmed the same findings, ie, improved survival for cases with multiple primaries, and especially for metachronous ones.
My Father always watched CBS news so we switched and Walter Cronkite confirmed the same.
