SpO2   T0h SpO2 T24h FEV1 T0h FEV1 T24h PEF T0h PEF T24h FIVC T0h FIVC T24h Rocuronium <0.0001 R2=0.22 0.00765 R2=0.19 0.004 R2=0.34 n.s. 0.0032 R2=0.24 n.s. 0.0001 R2=0.09 n.s. Propofol 0.0062 R2=0.26 0.0278 R2=0.20 <0.0001 R2=0.29 <0.0001 R2=0.25 0.0004 R2=0.16 <0.0001 R2=0.13 0.0057 R2=0.19 0.0001 R2=0.14 Age>50J 0.0233 R2=0.31 0.0014 R2=0.09 n.s. n.s. 0.0431 R2=0.27 n.s. 0.0497 R2=0.30 0.0147 R2=0.21 BMI>30 n.s. n.s. n.s 0.091 R2=0.33 n.s. n.s. n.s. n.s. Surgery time <90 n.s. 0.0021 R2=0.15 n.s n.s n.s. n.s. n.s. n.s.

Table 3: Factors identified as independent risk factors for pulse oximetry and lung impairment. Stepwise regression analysis with the respective R². Nagelkerkes´s R2 is an incremental measure of the goodness of fit of the regression model as additional variables are included in the model.