Table 5.

Comparisons of ICD-10 and DSM-IV diagnostic stability (%) of psychotic disorders

Category	ICD-10	DSM-IV	Ratio
Schizophrenia-like or Schizophreniform	28.6	10.5	2.7
Psychosis NOS	66.7	51.5	1.3
Acute or Brief	66.7	61.1	1.1
Major depression with psychosis	85.2	70.1	1.2
Delusional disorder	88.2	72.7	1.2
Schizophrenia	94.6	75.0	1.3
Bipolar disorder	96.5	96.5	1.0
Overall	90.4	75.3	1.2

The diagnostic systems yield highly correlated stability estimates (r = 0.97 [7 diagnoses], p=0.0004), but consistently higher stability (by 10%–270%) with ICD-10 criteria (slope= 1.16 [95% CI: 0.90–1.67]), including the identical, high, values for bipolar disorder.