Figure 8: Arterial Pressure of Oxygen (mm Hg)*,^†.

^*Abbreviations: CI, confidence interval; SD, standard deviation.

^†Surrogate outcome.

^‡Study 1 reports up to 7 years’ follow-up and study 2 reports 1 year’s follow-up.

^§Gorecka et al reports (24) 7 years’ follow-up.