58 Chapter 3 Table 1. Baseline characteristics Characteristic n = 15 Definition Statistics Results Gestational age weeks.days median (IQR) 26.4 (25.3 – 27.6) Birth weight grams median (IQR) 945 (740 – 1120) Postnatal age days median (IQR) 19 (17-24) Gender female/male n 4/11 Ventilation mode IMV/CPAP n 2/13 Average FiO2 24 hours prestudy fraction median (IQR) 0.26 (0.24 - 0.29) Weight at study entry grams median (IQR) 1197 (1021 – 1300) Allocation study entry Oxygenie /CLiO2 n 7/8 IMV, invasive mechanical ventilation, FiO2, fraction of inspirated oxygen; SpO2, peripheral oxygen saturation Figure 2: SpO2 histograms. Pooled time spent per SpO2 value as proportion of total usable time, while receiving supplemental oxygen and ambient air (total), or while only receiving supplemental oxygen. Dashed lines represent the limits of the target range. SpO2

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