Table 5.
Results of pilot International Classification of Diseases (ICD) diagnostic code hospital admission audit for encephalitis and encephalitis associated conditions at the Children's Hospital at Westmead, 1 May to 1 December 2013
| Full ICD-10 code audit | ICD-10 code audit excluding G93.4* | ICD-10 code audit excluding G93.4, B94.1 and B94.8* | |
|---|---|---|---|
| Cases identified | 115 | 51 | 40 |
| Cases suspected encephalitis (SE) identified | 25 | 20 | 20 |
| Consent obtained (% SE) | 23 (92%) | 20 (100%) | 20 (100%) |
| Cases of confirmed encephalitis | 16 | 13 | 13 |
| Sensitivity | 64% | 52% | 52% |
| Specificity | 9% | 21% | 27% |
| PPV | 14% | 25% | 33% |
PPV, Positive predictive value; SE, suspected encephalitis.
* G93.4, Unspecified encephalopathy (including influenza); B94.1, sequelae of viral encephalitis; B94.8, sequelae of infectious and parasitic disease.