Table 2

Factors associated with neurologically favourable 1-month survival

Characteristics of OHCANeurological outcomes at 1MCrude OR
(95% CI) for favourable neurological outcomes or P value
Adjusted OR
(95% CI) for favourable neurological outcomes or P value
Favourable
(N=78)
Unfavourable
(N=214)
Male patients, % (N)56.4 (44)71.5 (153)0.52 (0.30 to 0.88)0.76 (0.42 to 1.39)
Elderly patients, % (N)55.1 (43)50.9 (109)1.18 (0.70 to 1.99)1.35 (0.75 to 2.45)
Witness status, % (N)
 Unwitnessed10.3 (8)28.5 (61)ReferenceReference
 Bystander-witnessed66.7 (52)51.9 (111)3.57 (1.59 to 8.01)4.43 (1.84 to 10.7)
 EMS-witnessed23.1 (18)19.6 (42)3.27 (1.30 to 8.21)3.28 (1.21 to 8.87)
Shockable initial rhythm, % (N)6.4 (5)6.5 (14)0.98 (0.34 to 2.81)1.53 (0.27 to 8.76)
Prehospital defibrillation, % (N)7.7 (6)10.3 (22)0.73 (0.28 to 1.87)0.57 (0.12 to 2.71)
Prehospital epinephrine administration, % (N)11.5 (9)27.6 (59)0.34 (0.16 to 0.73)0.51 (0.22 to 1.20)
Advanced airway management, % (N)7.7 (6)35.5 (76)0.15 (0.06 to 0.36)0.17 (0.07 to 0.42)
Advanced life support by physician, % (N)14.1 (11)28.5 (61)0.41 (0.20 to 0.83)0.52 (0.22 to 1.23)
Physician in ambulance, % (N)6.4 (5)13.1 (28)0.45 (0.17 to 1.22)0.44 (0.13 to 1.42)
Time intervals, min, median (IQR)
 EMS response time8 (7–10)9 (7–14)p<0.010.94 (0.88 to 1.01) /1 min
 EMS transportation time25 (16–33)26 (18–34)p=0.061.03 (0.84 to 1.21) /10 min
  • EMS, emergency medical service; 1M, 1 month; OHCA, out-of-hospital cardiac arrest.