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Table 3 Agreement statistics between ICD-10 diagnoses in the Norwegian Patient Registry (NPR) and primary diagnoses according to DSM-IV in the Thematically Organized Psychosis (TOP) study

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

TOP-group Agreementa Kappa Sensitivity Specificity PPV NPV
Est. 95% CI Est. 95% CI Est. 95% CI Est. 95% CI Est. 95% CI Est. 95% CI
SCZ All .87 .85–.89 .74 .68–.80 .84 .81–.87 .90 .87–.92 .88 .86–.91 .86 .83–.89
Men .85 .82–.88 .69 .61–.77 .84 .81–.88 .86 .81–.90 .89 .86–.93 .79 .74–.84
Women .89 .87–.92 .77 .68–.85 .84 .78–.89 .93 .90–.95 .87 .82–.92 .91 .88–.94
Pre NPRb .88 .85–.91 .76 .67–.84 .85 .81–.90 .91 .87–.94 .89 .85–.93 .87 .83–.91
Post NPRc .86 .83–.89 .72 .63–.81 .83 .79–.88 .89 .85–.93 .88 .84–.92 .85 .81–.89
DEL All .92 .90–.93 .39 .34–.44 .69 .55–.82 .93 .92–.95 .31 .22–.40 .99 .98–.99
Men .90 .88–.92 .35 .27–.42 .61 .43–.79 .92 .89–.94 .29 .18–.41 .98 .96–.99
Women .94 .92–.96 .45 .37–.53 .82 .62–1.0 .95 .93–.97 .33 .18–.48 .99 .99–1.0
Pre NPRb .94 .92–.96 .32 .24–.39 .57 .27–.87 .95 .93–.97 .24 .09–.40 .99 .98–1.0
Post NPRc .90 .88–.93 .42 .34–.49 .74 .58–.89 .91 .89–.93 .34 .23–.45 .98 .97–.99
SCA Total .92 .91–.94 .63 .57–.69 .76 .68–.84 .94 .93–.96 .61 .53–.69 .97 .96–.98
Men .93 .91–.95 .55 .47–.63 .69 .54–.84 .95 .93–.97 .51 .38–.64 .98 .96–.99
women .92 .89–.94 .68 .60–.77 .80 .71–.89 .93 .91–.96 .67 .57–.77 .97 .95–.98
Pre NPRb .91 .89–.94 .59 .51–.68 .73 .61–.85 .93 .91–.96 .57 .45–.69 .97 .95–.98
Post NPRc .93 .91–.95 .67 .59–.75 .79 .69–.90 .95 .93–.97 .64 .53–.75 .97 .96–.99
BIP Total .87 .85–.89 .72 .66–.78 .78 .74–.82 .92 .90–.94 .86 .82–.89 .88 .86–.90
Men .90 .87–.92 .74 .66–.82 .78 .71–.84 .94 .92–.96 .84 .78–.90 .92 .89–.94
women .85 .82–.88 .69 .60–.77 .79 .73–.84 .90 .86–.93 .87 .82–.91 .83 .79–.87
Pre NPRb .86 .83–.89 .68 .60–.77 .72 .66–.78 .94 .91–.96 .88 .83–.93 .84 .81–.88
Post NPRc .89 .86–.91 .76 .67–.84 .85 .80–.90 .91 .88–.94 .84 .78–.89 .92 .89–.95
  1. Data obtained from NPR for the period 2008–2013 on patients recruited to TOP between 18.10.2002 and 01.09.2014
  2. Abbreviations: ICD-10 International Classification of Diseases, 10th revision, DSM-IV Diagnostic and Statistical Manual for Mental Disorders, 4th edition, PPV positive predictive value, NPV negative predictive value, Est. estimate, CI confidence interval, SCZ schizophrenia, DEL delusional disorder, SCA schizoaffective disorder, BIP bipolar disorder
  3. a Proportion of patients who were either correctly classified as having the diagnosis in question, or correctly classified as not having the diagnosis in question
  4. b Patients included in TOP between 18.10.2002 and 31.12.2007
  5. c Patients included in TOP between 01.01.2008 and 01.09.2014