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. 2023 Feb 17;23:57. doi: 10.1186/s12871-023-02011-5

Table 4.

Perioperative values of interleukin-6 (IL-6) and natural killer (NK) cell activity

Variable/ measurement time Conventional group (n = 37) SPI group (n = 38) P-value
Log-transformed Raw Log- transformed Raw
IL-6 (pg/mL)
 Before surgery 1.35 ± 1.13 7.25 1.25 ± 1.07 8.20 0.606
 POD 1 3.85 ± 1.06 77.33 3.80 ± 1.01 78.24
NK cell activity (pg/mL)
 Before surgery 4.95 ± 1.02 262.30 5.06 ± 1.22 348.20 0.326
 POD 1 3.29 ± 0.96 41.38 3.76 ± 1.06 110.62

Values are mean ± SD

SPI surgical pleth index, POD Postoperative day