Correlation of Surgical Pleth Index with Stress Hormones during Propofol-Remifentanil Anaesthesia

Figure 2

Linear regression analysis and correlation analysis between the SSI values and and stress hormones (ACTH, cortisol, epinephrine and norepinephrine). Bold line is regression line. Slopes of the above lines between time points are significantly different, 𝑃<0.01. ACTH: adrenocorticotropic hormone; SPI: surgical pleth index; Base: baseline before anaesthesia; Intu: after tracheal intubation; Max: at maximum operative trauma, defined intraoperatively by the surgeon; After-Max: 15 min after the maximum operative trauma.

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