Predictive value of preoperative shock index for postoperative outcomes in traumatic splenic rupture patients undergoing splenectomy

Table 7 Comparison of secondary prognostic indicators among three groups, mean ± SD/n (%)

Indicator	Low SI group (n = 78)	Moderate SI group (n = 89)	High SI group (n = 45)	Statistic	P value	Effect size	Pairwise comparison P values2
Postoperative hemoglobin changes (g/L)
24 hours postoperative	106.8 ± 16.4	84.2 ± 14.7	68.9 ± 13.2	F = 89.6	< 0.001	η2 = 0.461	P < 0.0013, P < 0.0014, P < 0.0015
48 hours postoperative	109.2 ± 15.8	89.6 ± 15.1	74.3 ± 14.6	F = 78.4	< 0.001	η2 = 0.428	P < 0.0013, P < 0.0014, P < 0.0015
72 hours postoperative	112.4 ± 16.2	95.7 ± 16.8	81.2 ± 15.9	F = 64.7	< 0.001	η2 = 0.382	P < 0.0013, P < 0.0014, P < 0.0015
Reoperation rate	2 (2.6)	8 (9.0)	9 (20.0)	χ2 = 8.741	0.013	Cramer’s V = 0.203	P = 0.0963, P = 0.0034, P = 0.0845
Reoperation causes				Fisher’s exact test	0.024
Postoperative hemorrhage	1 (1.3)	5 (5.6)	6 (13.3)
Abdominal infection	1 (1.3)	2 (2.2)	2 (4.4)
Pancreatic fistula management	0 (0.0)	1 (1.1)	1 (2.2)
mRS score (at discharge)				χ2 = 28.461	< 0.001	Cramer’s V = 0.259	P = 0.0063, P < 0.0014, P = 0.0215
0 points (completely asymptomatic)	52 (66.7)	38 (42.7)	12 (26.7)
1 point (no significant functional deficit)	18 (23.1)	28 (31.5)	14 (31.1)
2 points (mild functional deficit)	6 (7.7)	15 (16.9)	11 (24.4)
3 points (moderate functional deficit)	2 (2.6)	6 (6.7)	5 (11.1)
4 points (moderate to severe functional deficit)	0 (0.0)	2 (2.2)	1 (2.2)
5 points (severe functional deficit)	0 (0.0)	0 (0.0)	0 (0.0)

¹Linear trend χ² test.

²Pairwise comparisons corrected α = 0.0167 continuous variables using Türkiye honestly significant difference test, categorical variables using Bonferroni-corrected paired χ² test.

³Low shock index group vs moderate shock index group.

⁴Low shock index group vs high shock index group.

⁵Moderate shock index group vs high shock index group.

mRS: Modified Rankin Scale; SI: Shock index.