The possibly calming effect of having family present for the control group during the intervention could have played a part in the reaction. |
Patients in the control group received standard care delivered by the community mental health teams. |
Table 4 shows the relative mortality of this group of patients compared with the control group. |
Direct evaluation cannot be done because very few ganzfeld studies have included a control group. |
As healthcare providers, we often wonder whether it is ethical to use a control group or not. |
Researchers tested their SARS vaccine on four African green monkeys, with another four in the control group. |