Systemic immune-inflammation index within the first postoperative hour as a predictor of severe postoperative complications in upper abdominal surgery: a retrospective single-center study

Table 6 Comparison of SPCs between the groups with 1-h postoperative SII ≥ cutoff and SII < cutoff value

Postoperative complications	SII < 754.6 × 10⁹/L (n = 72)	SII ≥ 754.6 × 10⁹/L (n = 238)	P value
PPCs	7 (9.7%)	55 (23.1%)	0.013*
Adverse cardiovascular events	2 (2.8%)	20 (8.4%)	0.103
Infectious postoperative complications	6 (8.3%)	45 (18.9%)	0.034*
Delirium	0 (0%)	5 (2.1%)	0.215

PPCs postoperative pulmonary complications, SII Systemic immune-inflammation index
*P < 0.05

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