Table 2 Survival outcomes and hazard ratios (HR) for high- and low-risk patient groups in arterial, venous, and combined radiomic models.

From: Preoperative arterial and venous CT radiomics for survival prediction after pylorus preserving pancreatoduodenectomy in pancreatic head cancer

Metric

Arterial—low risk

Arterial—high risk

Venous—low risk

Venous—high risk

Combined—low risk

Combined—high risk

Median survival (days)

1,693.00

1,558.50

1,564.00

1,675.00

1,743.00

1,472.00

1-Year survival rate

90.0%

95.45%

82.35%

100.0%

86.96%

100.0%

2-Year survival rate

80.0%

72.72%

70.59%

80.0%

78.26%

73.68%

3-Year survival rate

80.0%

59.09%

64.71%

72.0%

73.91%

63.16%

5-Year survival rate

40.0%

40.91%

47.06%

36.0%

47.83%

31.58%

HR

1.20

0.91

1.24

  1. Median survival (in days), 1- to 5-year survival rates (%), and hazard ratios are presented for each group. Risk classification was determined by the Gradient Boosting Survival Analysis (GBSA) model. Hazard ratios were computed using the Cox proportional hazards model implemented in the lifelines Python package (CoxPHFitter).