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Table 2 Clinical outcomes between the Subsequently Shocked and Not Shocked groups

From: Subsequent shock deliveries are associated with increased favorable neurological outcomes in cardiac arrest patients who had initially non-shockable rhythms

  Subsequently Subsequently   
Not Shockeda Shockedb Odds ratio
  (n = 10,960) (n = 521) (95 % CI) P value
ROSC 2891 (26.4) 185 (35.5) 1.54 (1.28–1.86) <0.0001
24-hour survival 700 (6.4) 59 (11.3) 1.87 (1.41–2.48) <0.0001
1-month survival 187 (1.7) 25 (4.8) 2.90 (1.89–4.45) <0.0001
1-month good recoveryc 52 (0.5) 14 (2.7) 5.79 (3.19–10.5) <0.0001
  1. Data presented as number (percentage). P values calculated using chi-square test
  2. aPatients who had initially nonshockable rhythms and received no shock(s) during EMS resuscitation
  3. bPatients who had initially nonshockable arrest rhythms and subsequently received shock(s) owing to conversion to shockable rhythms during EMS resuscitation
  4. cSurvival with favorable neurological outcome defined as Cerebral Performance Category of 1 or 2 at 1 month after cardiac arrest
  5. CI confidence interval, EMS emergency medical service, ROSC return of spontaneous circulation