Medical algorithms have become increasingly important in medical treatments and diagnoses. Schober's index is one such algorithm used to measure the flexibility of the lower back. It is used as a diagnostic tool to detect scoliosis, which is an abnormal curvature of the spine. The patient stands up straight and measures from the bottom of their waist, a distance measured in centimeters to their fingertips. This measurement is then compared to the patient's height, and a score is calculated. The higher the score, the more flexible the lower back and it can help to diagnose scoliosis. Schober's index is just one example of a medical algorithm that can help detect health conditions and improve medical treatments.