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. Author manuscript; available in PMC: 2019 Aug 16.
Published in final edited form as: Anaesthesia. 2017 Sep 11;72(11):1334–1343. doi: 10.1111/anae.14039

Figure 1.

Figure 1

Flow of patients through study. ASA, ASA physical status; BMI, body mass index, CCI, Charlson Comorbidity Index; FIO2, inspired oxygen fraction; PEEP, positive end-expiratory pressure; PCV, pressure-controlled ventilation; RVU, relative value units; VCV, volume-controlled ventilation.