Financial Times is quoting an ICAO report about pilots concealing depression:
ICAO cited studies that showed pilots may be under-reporting instances of depression to continue flying. Rules in many countries bar pilots from the cockpit if they are taking antidepressants.
“According to the Aviation Medicine Advisory Service database of pilots’ telephone inquiries, approximately 15 per cent of pilots who had been advised by their physicians to take antidepressant medication showed an intention to take the medication and continue flying without informing the Federal Aviation Administration,” the report stated.
http://www.ft.com/cms/s/0/0f074560-d...#axzz3VUkxUB2m