Complex sentence: While there is no gender difference in depression rates up until age 15, after that age the rate among women doubles compared to men; however, in terms of recurrence rates and symptom severity, there is no gender difference.
Split into simpler sentences: While there is no gender difference in depression rates up until age 15, after that age the rate among women doubles compared to men. However, in terms of recurrence rates and symptom severity, there is no gender difference.