When should retained Paparella type I tympanostomy tubes be removed in asymptomatic children?

Tympanostomy tubes removed before 12 months showed a high possibility of recurrence. Removal after 15 months showed an increased possibility of complications. Spontaneous extrusion seldom occurred after 18 months. From these findings, we concluded that asymptomatically retained tympanostomy tubes are recommended to remove when a tube is retained for more than 18 months.