The phrase "arm of the study" is not correct in standard written English.
It seems to be a misinterpretation of "area of study" or "branch of study," which are commonly used terms.
Example: "The arm of the study focused on environmental science and its impact on urban development."
Alternatives: "field of study" or "discipline of study."
In the estrogen-only arm of the study, women were picked at random to receive either estrogen or a placebo.
In one arm of the study, the early withdrawal penalty was 10percentt; in a second arm it was 20percentt; and in the third arm of the study no withdrawals were allowed before the early withdrawal date.
For the gay arm of the study, Merck has recruited men from 16 to 26 who have had no more than five sexual partners.
Another arm of the study analyzed data on millions of pregnant women who gave birth in New Jersey, Michigan and Texas over the course of 15 years.
That this arm of the study has not yet been stopped indicates that, so far, estrogen has caused neither significant harm nor significant benefit.
The results in women with hysterectomies contrast with those from another arm of the study involving women who had not had hysterectomies and who took estrogen and progesterone.
Some investigators would assign one person in a household — the wife, for example — to one arm of the study — say, to the group consuming olive oil.
In the medical arm of the study, 800 μg of misoprostol was placed within the posterior vaginal fornix.
Summary results information may be submitted once data are available for one or more primary outcome measures and for each arm of the study.
In 2004 the other arm of the study was also halted, because the women taking estrogen alone had a higher rate of stroke than the women on placebo.
In one arm of the study, patients continued therapy with maximum-dose sulfonylureas.
