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Table 1 Prehospital characteristics of the study populationa

From: Impact of routine percutaneous coronary intervention after out-of-hospital cardiac arrest due to ventricular fibrillation

Characteristics Overall population Group 1 (< 45 yr) Group 2 (45 to 54 yr) Group 3 (55 to 64 yr) Group 4 (65 to 74 yr) Group 5 (≥75 yr)
  (N = 111) (n = 22) (n = 27) (n = 22) (n = 23) (n = 17)
Age, yr* 58 [47 to 70] 40 [36 to 43] 50 [47 to 52] 59 [58 to 61] 70 [67 to 72] 78 [76 to 83]
Males, n (%) 87 (78) 20 (91) 22 (81) 19 (86) 16 (70) 10 (59)
Medical history, n (%)       
   Hypertension* 46 (41) 3 (14) 10 (37) 8 (36) 15 (65) 9 (53)
   CHD* 27 (24) 2 (9) 4 (15) 3 (14) 10 (44) 8 (47)
   NYHA classification III or IV* 29 (26) 1 (5) 5 (19) 5 (23) 12 (52) 6 (35)
Location of cardiac arrest*       
   Home, n (%) 43 (39) 8 (36) 8 (30) 5 (24) 11 (48) 11 (65)
   Workplace, n (%) 18 (16) 4 (18) 12 (44) 2 (10) 0 0
   Public place, n (%) 50 (45) 10 (45) 7 (26) 15 (67) 12 (52) 6 (35)
   No-flow duration, minutes 5 [1 to 10] 4 [1 to 8] 5 [1 to 10] 5 [1 to 10] 5 [1 to 10] 6 [1 to 10]
   Time to ROSC, minutes 30 [16 to 45] 27 [14 to 44] 33 [19 to 48] 21 [19 to 50] 32 [16 to 45] 31 [19 to 41]
   Epinephrine dose, mg 2 [0 to 8] 1.5 [0 to 7.5] 5 [0 to 10.5] 2 [0 to 5] 2 [0 to 4.5] 3 [0 to 6.25]
ECG, n (%)       
   ST elevation 50 (45) 9 (41) 16 (59) 11 (50) 6 (26) 8 (47)
   LBBB 10 (9) 0 2 (7) 3 (14) 4 (17) 1 (7)
  1. aCHD: coronary heart disease; NYHA: New York Heart Association; ROSC: return of spontaneous circulation; epinephrine dose: cumulative dose of epinephrine required during initial resuscitation; ECG: electrocardiogram; LBBB: left bundle branch block. *P < 0.05 between-group comparisons. Numbers between brackets are percentages or 25th to 75th percentiles.