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 | |