The quality of severe mental disorder diagnoses in a national health registry as compared to research diagnoses based on structured interview

Table 4 Consistency^a between ICD-10 diagnoses in the Norwegian Patient Registry (NPR) and DSM-IV diagnosis in the Thematically Organized Psychosis (TOP) study

TOP group		SCZ (n = 537)		DEL (n = 48)		SCA (n = 118)		BIP (n = 408)
NPR diagnoses	ICD-10 codes	n	%	n	%	n	%	n	%
Severe mental disorder	F20-F31, F32.3, F33.3	36,544	100	1661	100	6322	100	13,238	100
Schizophrenia	F20	31,040	84.9	523	31.5	1040	16.5	174	1.3
Delusional disorder	F22	1123	3.1	982	59.1	186	2.9	146	1.1
Schizoaffective disorder	F25	1509	4.1	0	0	4168	65.9	543	4.1
Bipolar disorder	F30–F31	599	1.6	66	4.0	695	11.0	12,044	91.0

Abbreviations: ICD-10 International Classification of Diseases, 10th revision, DSM-IV Diagnostic and Statistical Manual of Mental Disorders, 4th edition, TOP Thematically Organized Psychosis, SCZ schizophrenia, DEL delusional disorder, SCA schizoaffective disorder, BIP bipolar disorder (type I, type II, and bipolar disorder not otherwise specified)
^a Percentage of all registered contacts with a severe mental disorder diagnosis (F20–F31, F32.3, F33.3) in the NPR during 2008–2013 that included the primary DSM-IV diagnosis assigned when recruited to the TOP-study between 18.10.2002 and 01.09.2014

ISSN: 1471-244X