Claim: 50% of mental health problems are established by age 14 and 75% by age 24.
Fact-check: What age do mental health conditions develop at? - Full Fact
Verdict: this was the finding of an american study that interviewed people to diagnose mental health conditions and asked them about when their condition began. the study's authors said the findings were likely to be "conservative" and that some people might not remember when their condition started correctly.
Organisation: Full Fact
Author: Robin Wilkinson
Date published: 2018-08-07T00:00:00