A 45 year old woman repos that she has been having increased involuntary loss of urine, which is especially pronounced when she is feeling nervous or while sitting at her desk. Jogging does not worsen the incontinence. She has not had these symptoms in the past and is otherwise healthy. She is not taking any medications and has never been pregnant. On physical examination, she is afebrile, with stable vital signs. Her abdomen is benign, and vaginal examination reveals no prolapse. Sensation in all extremities is intact, with good motor strength. Her gait is normal, and reflexes are intact. Her work-up reveals a negative urinalysis, and blood cultures and urine cultures are all negative. Serum glucose level and glycosylated hemoglobin level is normal. Which of the following tests would be the most appropriate next step in diagnosis?

**Core Concept**
The underlying principle being tested is the diagnosis of **urinary incontinence**, specifically focusing on the type that is exacerbated by emotional states or specific positions, but not by physical activity like jogging. This suggests a non-stress, non-urge type of incontinence, potentially related to **neurological** or **psychological factors**.

**Why the Correct Answer is Right**
Given the absence of stress incontinence (not worsened by jogging), urge incontinence (no frequent urination), and mixed incontinence, and the presence of incontinence during emotional states or specific positions, the diagnosis might lean towards **overactive bladder** or a **functional** issue. However, without explicit answer choices, the most appropriate next step generally involves assessing bladder function and neurological control, often through **urodynamic studies**.

**Why Each Wrong Option is Incorrect**
**Option A:** Would be incorrect if it suggested a **imaging study** as the first line, given the lack of evidence for a structural issue.
**Option B:** Might be incorrect if it proposed an **invasive procedure** without first trying less invasive diagnostic methods.
**Option C:** Could be wrong if it recommended **empirical treatment** without diagnosing the underlying cause.
**Option D:** Might be incorrect if it suggested **specialized testing** not aligned with the presenting symptoms.

**Clinical Pearl / High-Yield Fact**
A key point in diagnosing urinary incontinence is to distinguish between stress, urge, and mixed types, as each has different treatment approaches. Urodynamic studies can provide valuable information on bladder function and help guide treatment decisions.

**Correct Answer:** Unfortunately, without the explicit answer choices provided, the most accurate response cannot be directly stated, but typically, **urodynamic studies** would be a crucial diagnostic step for such cases.

✓ Correct Answer: D. Cystometry