Agility

From the OblivioWiki – your guide to everything Oblivion

The Agility base attribute affects a character's ability to hit and dodge attacks. It also plays a part in stealth and lockpicking.

Agility affects your ability to maneuver and balance, your total Fatigue, and how much damage you can do with marksman weapons such as bows. Agility governs the Marksman, Security, and Sneak skills. Agility over 100 will still increase the fatigue, but not the marksman damage.