Final answer:
The statement is false because case mix index (CMI) is not solely determined by volume in a clinical area. The CMI is a measurement used to quantify the complexity of patient cases and is calculated based on a variety of factors such as diagnosis, procedures performed, and resources utilized.
Step-by-step explanation:
The statement is false because case mix index (CMI) is not solely determined by volume in a clinical area. The CMI is a measurement used to quantify the complexity of patient cases and is calculated based on a variety of factors such as diagnosis, procedures performed, and resources utilized. While an increase in volume may lead to an increase in CMI, it is not always the case as some cases may have a lower or higher CMI regardless of volume.