Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle. Plate tectonics is the theory that Earth's outer shell is divided into several plates that glide over the mantle.
The term âfutilityâ is used to refer to the inability of a clinical trial to achieve its objectives. In particular, stopping a clinical trial when the interim results suggest that it is unlikely to achieve statistical significance can save resources that could be used on more promising research.
Clinical Trial. A research study 1 in which one or more human subjects 2 are prospectively assigned 3 to one or more interventions 4(which may include placebo or other control) to evaluate the effects of those interventions on health-related biomedical or behavioral outcomes 5.