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Transport mode and the need for TCHIa.
| TCHI received | |||
|---|---|---|---|
| Transport mode | Yes | No | Total patients |
| LSTb | 40 | 27 | 67 |
| No LST | 6 | 251 | 257 |
| Total patients | 46 | 278 | 324 |
Sensitivity: 40/46 (87.0%); specificity: 251/278 (90.3%); positive predictive value: 40/67 (59.7%); negative predictive value: 251/257 (97.7%). aTCHI: time-critical hospital intervention; bLST: lights and siren transport.
