Hoek, H.W.

discrimination group schizophrenia study disorder minority patient minority groups cannabi symptom cannabis use netherland control incidence psychosi dutch health psychiatry hague sibling factor table result immigrant country level veling experience research difference moroccan contact selten ethnicity scale population predisposition association score measure interview onset risk factor psychopathology status illness psychol degree neighbourhood fi ndings education regression delusion mood symptoms illness onset hospital controls university identity genotype –environment correlation support perception minority patients hospital murray diagnosis control groups selten jp dutch patients people case-control study proportion effect criteria finding non-western fi ve times department prevalence history selection bias