American Board of Family Medicine (ABFM) Exam 2026 – 400 Free Practice Questions to Pass the Exam

Urge incontinence, particularly in elderly individuals, is primarily caused by detrusor instability. This condition involves involuntary contractions of the bladder muscle (the detrusor) during the filling phase, leading to a sudden and uncontrollable urge to urinate. As people age, changes in bladder function and muscle control can result in this instability, making it a prevalent issue among older adults.

Detrusor instability often manifests as a frequent need to void, sometimes with minimal warning, which aligns with the symptoms experienced by individuals suffering from urge incontinence. Understanding this condition is crucial for proper diagnosis and management.

While other factors such as prostate enlargement, neurological disorders, and certain medications can contribute to urinary issues in older adults, they are not the primary causes of urge incontinence. Prostate enlargement generally leads to obstructive symptoms rather than the urge type, neurological disorders can cause various types of incontinence but are less common as a singular cause of urge incontinence compared to detrusor instability, and medications may contribute indirectly or as side effects rather than serving as a primary cause. Therefore, detrusor instability is recognized as the most common underlying mechanism for urge incontinence in this demographic.