Table 3.
Temporal trends in the number of phone calls to hospitals from ambulances and the time from patients' call to hospital arrival among patients with acute myocardial infarction (AMI) without arrest and (OHCA) of cardiac origin transported by emergency medical service
| 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | P for trend | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AMI without arrest | |||||||||||
| ≥2 phone calls to hospitals from ambulances, n (%) | 106 (11.6) | 102 (11.8) | 92 (11.5) | 118 (14.5) | 111 (13.1) | 137 (15.4) | 141 (15.6) | 186 (20.3) | 165 (20.9) | 216 (25.3) | <0.001 |
| Time interval from patient's call until hospital arrival, min, mean (SD) | 23.5 (9.8) | 23.0 (9.2) | 23.0 (8.8) | 23.8 (8.9) | 23.5 (8.4) | 24.2 (8.7) | 24.3 (8.3) | 25.3 (9.0) | 25.4 (9.0) | 25.8 (8.7) | <0.001 |
| OHCA of cardiac origin | |||||||||||
| ≥2 phone calls to hospitals from ambulances, n (%) | — | — | 172 (25.0) | 212 (28.4) | 232 (23.6) | 308 (25.7) | 340 (29.7) | 433 (31.0) | 462 (31.6) | 639 (38.4) | <0.001 |
| Time interval from patient's call until hospital arrival, min, mean (SD) | — | — | 25.3 (7.3) | 25.2 (6.9) | 24.0 (6.9) | 24.5 (6.9) | 25.5 (7.1) | 25.6 (7.0) | 26.3 (7.3) | 27.6 (7.8) | 0.022 |
—, not applicable; SD, standard deviation.