Table 1.
Characteristics of included studies
| Study | Study region | Liberal group FiO2 | Conservative group FiO2 | Delivery method |
Participants’ sample size, n | Mean age, years | Female, n(%) |
Witnessed arrest n(%) | Liberal group, medium baseline SpO2 (%) | Conservative group medium baseline SpO2 (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| Kuisma [18] | Finland | 1.00 | 0.33 | Mechanical ventilation | 28 | 63.1 | 5(17.9) | 28(100.0) | NA | NA |
| Young [19] | New Zealand | 1 | 0.4 | Ventilated using a self-inflating resuscitation bag | 17 | 66.2 | 1(5.9) | 12(70.6) | 95.8% | 79.5% |
| Bray [20] | Australia | NA | NA | Hand ventilation using a bag-valve reservoir | 61 | 62.6 | 12(19.7) | 45(73.8) | NA | 98 |
| Jakkula [21] | Finland and Denmark | 0.5 | 0.35 | Mechanical ventilation | 120 | 59.5 | 22(18.3) | 120(100.0) | NA | NA |
| Thomas [22] | United Kingdom | NA | NA | Mechanical ventilation or oropharyngeal airway | 35 | 67.1 | 10(28.6) | 31(88.6) | NA | NA |
| Bernard [23] | Australia | 1 | 0.7/0.6 | Oxygen reservoir bag or mechanical ventilation | 425 | 65.3 | 100(23.5) | 335(78.8) | 99 | 99 |
| Schmidt [24] | Denmark | 0.6 | 0.3 | Mechanical ventilation | 789 | 62.5 | 152(19.3) | 672(85.2) | 98 | 98 |
FiO2 Fraction of inspired oxygen
SpO2 Arterial saturation of peripheral oxygen