Time of 911 emergency call receipt | P value | |||
---|---|---|---|---|
Daytime | Evening | Night | ||
0701–1500 h | 1501–2300 h | 2301–0700 h | ||
(n = 5474) | (n = 5336) | (n = 2970) | ||
Age, years | 75 (63–83) | 76 (64–84) | 74 (61–83) | 0.0003 |
Sex, % male | 61.9 | 59.1 | 60.3 | 0.12 |
Location, % home | 66.0 | 75.6 | 76.2 | <0.0001 |
Witnessed arrest, % | 51.6 | 47.4 | 46.4 | <0.0001 |
Bystander CPR, % | 37.3 | 37.8 | 33.6 | 0.0003 |
Call-response interval, minutes | 7.0 (6.0–10) | 7.0 (6.0–10) | 7.0 (6.0–9.0) | <0.0001 |
Initial shockable rhythm, % | 9.1 | 7.0 | 7.2 | 0.0001 |
Cardiac etiology, % | 51.8 | 51.1 | 56.0 | <0.0001 |
Prehospital ROSC, % | 10.4 | 7.4 | 5.5 | <0.0001 |
ROSC, % | 38.2 | 32.3 | 29.6 | <0.0001 |
24-h survival, % | 15.3 | 10.8 | 9.9 | <0.0001 |
1-month survival, % | 7.6 | 5.0 | 4.9 | <0.0001 |
1-month good recovery, % | 4.7 | 2.9 | 3.1 | <0.0001 |