The phrase "treatment arms" refers to different groups or methods of treatment that are being tested or compared in a scientific study or clinical trial. Full definition
Some modest but statistically significant differences emerged between the accelerated and conventional treatment arms in shorter - term bowel and urinary side effects. (sciencedaily.com)
The antiretroviral drugs, of course, can only work if they are in the blood or tissues when HIV attempts to establish an infection, so nonadherent participants who are in treatment arms of these studies make it exceedingly difficult to tease out whether infections occurred because of the drug failure or their own behavior. (sciencemag.org)
Although SRS improved LC, there were no differences between treatment arms for regional recurrence, overall survival or time to WBRT. (sciencedaily.com)