Figure 2. Bar charts summarizing demographic characteristics and patient follow-up details.

The charts display key variables including age at epilepsy onset, age at surgery, current age, and total follow-up duration. The data reveal that the median age of epilepsy onset was three years, with a median age at surgery of 14 years, indicating early disease manifestation and intervention. The current median age of participants was 25 years, reflecting a wide range of follow-up durations. The total follow-up duration had a median of nine years, providing substantial long-term data on the effects of vagus nerve stimulation.