Pulse oximetry is routinely used fo

Pulse oximetry is routinely used for monitoring patients’ oxygen saturation lev- els. During continuous monitoring, we wanted to be able to describe the patterns of oxygen saturation using a model. We have the data of 36 individuals, each subject was tested the oxygen saturation continuously for approximately 1 hour at a frequency of 1 Hz. We also recorded the following information about the participants, including age, BMI, gender, Smoking history and/or current smoking status, and any significant medical conditions that could affect reading. We want to use these data to find typical patterns of variability in oxygen saturation so that we could use several parameters to characterize an individual. We would also like to see whether the pattern of oxygen saturation series is related to age, i.e., which characteristics change in older people compared to younger people. These characteristics should ideally be of biological or medical significance.