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Table 1 The effect of introducing an SOP * for pre-hospital controlled ventilation on the use of automatic ventilators

From: Standard operating procedure changed pre-hospital critical care anaesthesiologists’ behaviour: a quality control study

Ventilator used Before SOP (CI) After SOP (CI) Total
Yes 100 198 298
No 149 68 217
Total 249 266 515
Prevalence 0.40 (0.34-0.47) 0.74 (0.69-0.80) 0.58
  1. *Standard operating procedure.