Final answer:
Approximately 1 in 10 adolescent girls is affected by clinical depression.
Step-by-step explanation:
Approximately 1 in 10 adolescent girls is affected by clinical depression.
According to the information provided, major depressive disorder (MDD) has a point prevalence ranging around 4-7% and a lifetime prevalence estimate of about 15-20%.
However, it's important to note that the prevalence rates may vary depending on different factors such as demographics, location, and population studied.