A 60-year-old male with diabetes mellitus and hypertension sees you for routine follow-up. He has no acute health concerns during today's visit. His current medications include metformin (Glucophage), lisinopril (Prinivil, Zestril), and hydrochlorothiazide. He smokes cigarettes anc has a 40-pack-year smoking history. His vital signs and a physical examination are normal. An in-office dipstick urinalysis reveals 1+ blood and trace protein but is otherwise normal.Which one of the following would be the most appropriate follow-up?
Repeat dipstick urinalysis in 3 months
Microscopic urinalysis
Renal ultrasonography
CT urography
Referral for cystoscopy
Microscopic urine analysis