This medical condition affects more than 13 million men and women in the United States, and can be subdivided into "wet" or "dry" overactive bladder. Wet overactive bladder, in which urinary urgency leads to leakage of urine, is also known as urinary incontinence and affects over 9% of women. Dry overactive bladder does not lead to leakage of urine, and affects over 7% of women.