The ALSFRS is designed to track a person's progress over time. The scores range from 0 to 4. Zero signifies no function, whereas four means full function. With additional tests, the ALSFRS-R can offer a more complete picture of the patient's health.
Reference Link:
https://alstreatmentprotocol.gonevis.com/what-is-the-alsfrs-als-functional-rating-scale/
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