Table 1.
PPV of register codes for ICH and underlying diagnoses in nonverified cases in the DSR and the DNPR
| DSR (n=400) | DNPR (n=400) | |
|---|---|---|
| Diagnosis ICH verified | ||
| Any ICH | ||
| Number | 374 | 358 |
| PPV (95% CI) | 94% (91–96) | 88% (84–91) |
| Spontaneous ICH | ||
| Number | 338 | 307 |
| PPV (95% CI) | 85% (81–88) | 75% (70–79) |
| Diagnosis ICH not verified, no. (%) | ||
| Subdural hematoma | 4 (15.4) | 14 (33.3) |
| Subarachnoid hemorrhage | 6 (23.1) | 9 (21.4) |
| Hemorrhagic infarct | 8 (30.8) | 9 (21.4) |
| Ischemic stroke | 4 (15.4) | 3 (7.1) |
| Code error | 3 (11.5) | 6 (14.3) |
| Othera | 1 (3.9) | 1 (2.4) |
Note:
a
“Other”: one case with insufficient information and one case with intraventricular hemorrhage in connection with ventricular catheter insertion.
Abbreviations: CI, confidence interval; DNPR, Danish National Patient Registry; DSR, Danish Stroke Registry; ICH, intracerebral hemorrhage; PPV, positive predictive value.