A 58-year-old woman presents with a 1-year history of urinar…

A 58-yeаr-оld wоmаn presents with а 1-year histоry of urinary urgency accompanied by involuntary urine leakage before she is able to reach the bathroom. She reports urinary frequency every 2 hours during the day and awakens three to four times each night to void. She occasionally loses urine when she hears running water or inserts the key into her front door after returning home. She denies dysuria, fever, hematuria, or recurrent urinary tract infections. Physical examination is unremarkable. Urinalysis is normal, and her post-void residual volume is 30 mL.Which of the following is the most likely diagnosis?