Statistical analysis
low arterial blood oxygen
This was a post-hoc analysis, and therefore the sample size was determined by data availability. Patients without complete SO records during the continuous monitoring period were excluded from the analysis. Descriptive and baseline characteristics were reported using mean and standard deviation (SD) or frequencies and percentages for continuous and categorical variables, respectively. The incidence of OIRD episodes was modeled using generalized estimating equation (GEE) models, with a Poisson distribution, a log-link function and time of exposure as offset. Estimated differences between groups were reported as incidence rate ratios (IRR), along with their 95% CI. Subtypes of OIRD, including low respiratory rate, low arterial blood oxygen saturation (SpO