One aspect I'd add to schizophrenia is urban housing isn't as peaceful as you would think, tested this with a contact microphone and darn, those faint convo's you hear at night - well they can actually be real. Add in a roof and a housing estate back to back with tinny weeny gardens if any and you have an environment that would sure exacerbate or indeed induce symptoms that to the patient present to a doctor would be an easy tick box and pill prescription.

Heck one of my neibours has a nickname same as my surname and his other half would nag by calling his name loud at night - that really wasn't helpful for my REM phase sleeps I tell you and one mystery I'm glad that I solved.