Loss to follow-up in a longitudinal study on urogenital tract symptoms in Dutch older men.

Objective: To describe loss to follow-up (LTFU) in a longitudinal community-based study on urogenital tract dysfunction in older men.

Patients And Methods: A cohort study of men recruited from a Dutch municipality was performed. A baseline study and two follow-up rounds--all with questionnaires and additional measurements--were performed with, on average, 2.