List of artifact filtering methods applied to blood pressure data. All blood pressure measurements were used to quantify hypotension. Four artifact filtering methods were chosen, which were applied on blood pressure data. ^*As a variation, the lower limits for pulse pressure and mean blood pressure were varied, to 10 mmHg and 20 mmHg, respectively.^{17–19 †}Two different values for n (5 and 7) were used.^{3,20–27 ‡}Three different values for n (1, 2, and 3) were used.^15,16  IQR, interquartile range.