Variance is a statistical measure which tells us how measured data vary from the average value of the set of data.
2. pertaining to or located near the sciatic nerve or vein. sciatic nerve a nerve extending from the base of the spine down the thigh, with branches throughout the lower leg and foot; it is the widest nerve of the body and one of the longest. sciatica is pain or inflammation along the course of this nerve. See anatomic Table of Nerves in the Appendices and see Plates.
What Is Sciatica? Sciatica is a severe pain in the leg caused by compression, irritation, or inflammation of the sciatic nerve. The sciatic nerves are the largest and longest nerves in the body, reaching about the size of your thumb in diameter, and running down the back of each leg.