borderline significantp = 0.06
Respiratory events requiring ICU admission were significantly associated with residual hypercapnia (Figure 2 ), defined both as TcCO 2 > 49 mmHg during ≥10% of the total recording time (“hypercapnia[2],” p = 0.001) and peak TcCO 2 > 55 mmHg (“hypercapnia[3],” p = 0.01), while peak TcCO 2 > 49 mmHg (“hypercapnia[1]”) showed a borderline significant association ( p = 0.06).