Investigation off difference otherwise ? dos screening, while the appropriate, were utilized to examine brand new delivery regarding diligent characteristics predicated on amounts of clean air saturation. I plotted outcomes facing outdoors saturation having fun with in your town weighted scatterplot smoothing (Lowess) shape.
Multiple logistic regression was used to determine the independent association between hypoxemia (blood oxygen saturation < 90%) and our composite outcome. Because the PSI already includes age, we did not adjust for this separately in our models. The PSI also includes hypoxemia (P02 < 60 mm Hg or blood oxygen saturation < 90%) but accords it only 10 points [ 6], so we subtracted this value from hypoxemic patients (see Supplementary Appendix ). We forced oxygen saturation (dichotomous variable) and the modified PSI (continuous variable) into all models. We then considered other variables based on clinical importance, univariate P values <.1, or when a variable confounded (>10% change in ?) the association between saturation and outcomes irrespective of statistical significance. Fortsätt läsa