Emergency calls duration, response times and diagnostic accuracy divided into quartiles according to initial call duration
| Group number | Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 |
| 6–12 s | 13–15 s | 16–19 s | 20–92 s | |
| Number of 2222 calls (n) | 136 | 100 | 93 | 97 |
| Call duration (s)* | 11 (10–12) | 14 (13–15) | 17 (16–18) | 24 (21–29) |
| Operator/system processing time (s)* | 50 (36–73) | 53 (38–77) | 52 (37–74) | 51 (38–77) |
| Total call time (s)* | 60 (47–83) | 67 (52–91) | 71 (56–92) | 79 (64–104) |
| Sensitivity (%) | 91 (82.5–96.6) | 86 (73.2–93.2) | 100 (90.2–100) | 85 (67.3–94.2) |
| Specificity (%) | 38 (25.8–51.0) | 61 (45.5–75.2) | 70 (53.6–80.9) | 82 (69.5–89.6) |
↵* Data are median (IQR).