Figure 5.

Daily mean values of the partial pressure of carbon dioxide (PCO₂) in all patients who were intubated at the time of measurement. Error bars indicate SDs; lower bars indicate numbers of patients contributing data. Shaded areas indicate the target ranges of the high target and control target groups. The PCO₂ values were significantly higher in patients randomized to the high target group as compared to the control target group (linear mixed effects regression model, p < 0.0001), although the high target range was frequently not achieved owing to the patients’ own respiratory efforts. The main reason for absent data was extubation. PD, postnatal day.