Table 1.
Time trend of the accuracy of hospital discharge codes in identifying hospitalised stroke cases ascertained using multiple sources (sensitivity) stratified by initial reasons for admission.
| All hospitalised cases | Admitted for suspected stroke | Stroke during hospital admission for other disease | |
|---|---|---|---|
| Year | (coding identified/total, %) | (coding identified/total, %) | (coding identified/total, %) |
| All stroke cases | |||
| 2002–2005 | 256/359 (71.3) | 231/303 (76.2) | 25/56 (44.6) |
| 2005–2008 | 232/358 (64.8) | 217/315 (68.9) | 15/43 (34.9) |
| 2008–2011 | 278/402 (69.2) | 253/349 (72.5) | 25/53 (47.2) |
| 2011–2014 | 278/380 (73.2) | 266/338 (78.7) | 12/42 (28.6) |
| 2014–2017 | 297/384 (77.3) | 280/342 (81.9) | 17/42 (40.5) |
| ptrend | 0.005 | 0.004 | 0.49 |
| Total | 1341/1883 (71.2) | 1247/1647 (75.7) | 94/236 (39.8) |
| Incident cases | |||
| 2002–2005 | 179/253 (70.8) | 169/223 (75.8) | 10/30 (33.3) |
| 2005–2008 | 174/276 (63.0) | 163/244 (66.8) | 11/32 (34.4) |
| 2008–2011 | 204/298 (68.5) | 194/268 (72.4) | 10/30 (33.3) |
| 2011–2014 | 223/297 (75.1) | 215/268 (80.2) | 8/29 (27.6) |
| 2014–2017 | 231/297 (77.8) | 216/265 (81.5) | 15/32 (46.9) |
| ptrend | 0.002 | 0.002 | 0.43 |
| Total | 1011/1421 (71.1) | 957/1268 (75.5) | 54/153 (35.3) |