Fig. 2From: Long- versus short-interval follow-up of cytologically benign thyroid nodules: a prospective cohort studyEffects of age <50 years and <50 % cystic content on the absolute risk of nodule growth. Growth was calculated as the increase in volume between the baseline and first follow-up ultrasounds. Age analyses were corrected for follow-up time, cystic content and sex, and cystic content analyses were corrected for follow-up time, age and sexBack to article page