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Table 4 ROSC according to bystander CPR group

From: Impact of dispatcher-assisted cardiopulmonary resuscitation on neurologically intact survival in out-of-hospital cardiac arrest: a systematic review

Author, year of publication ROSC Adjusted OR (CI) for ROSC at … Proportion of OHCA calls where DA-CPR was provided% (m/M)
DA-CPR provided % (n/N) Bystander CPR provided without DA% (n/N) No bystander CPR% (n/N)
Chang et al., 2018a [37] 6.6% (49/747) 9.9% (29/293) 3.3% (32/980)   37.0% (747/2020)
Harjanto et al., 2016c [39] 26.9% (14/52) 30.3% (233/769) 27.2% (583/2147)   1.8% (52/2968)
Hiltunen et al., 2015d [40] 66.0% (35/53) 61.2% (30/49) 54.5% (18/33)   39.3% (53/135)
Park et al., 2018a [44] 7.4% (1433/19,343) 8.9% (599/6753) 3.8% (1030/27,144)   36.3% (19,343/53,240)
Shibahashi et al., 2019b [45] 9.2% (8017/86,913) 13.6% (6392/46,964) 8.1% (36,423/448,606) No BCPR: referencef
BCPR: 1.76 (1.71–1.81)
DA-CPR: 1.34 (1.31–1.38)
14.9% (86,913/582,483)
Viereck et al., 2017b [46] 33.8% (118/357) 41.2% (77/191)   DA-CPR: referenceg
BCPR: 0.88 (0.56–1.38)
65.1% (357/548)
Wu et al., 2018d [47] 16.0% (154/964) 20.9% (112/535) 15.1% (111/737)   43.4% (1002/2310)e
  1. CPR cardiopulmonary resuscitation, DA dispatcher assistance, DA-CPR dispatcher assisted CPR, n number with ROSC, N total number of OHCAs, m number of OHCAs who received DA-CPR, M total number of OHCA in the study population, OHCA out-of-hospital cardiac arrest, ROSC return of spontaneous circulation
  2. aROSC at hospital arrival
  3. bROSC before hospital arrival
  4. cROSC prehospitally or in the emergency department
  5. dSustained ROSC
  6. eMissing data on survival, why the numbers in the three survival data columns do not add up to 1002 and 2310 respectively
  7. fAdjusted for: age, sex, presumed cardiac etiology, witnessed status, initial shockable rhythm, call-to-response time, call-to-hospital time, and period of hospital admittance
  8. gAdjusted for: age, sex, witnessed status, and number of bystanders