**4. Diagnosis**

The presumptive diagnosis of OAB can usually be made in the primary care provider's office. Patients who present with the symptoms of urinary urgency and frequency can be evaluated utilizing standardized questionnaires, bladder diaries, a thorough history and physical examination, and simple laboratory tests. Those patients with more complex presentations may require urodynamic studies to confirm the diagnosis of OAB or detrusor overactivity.
