Table 5.

Distribution of risk scores and risk classification in a prediction score (HEARTS-Score) for arterial–esophageal fistula in the validation cohort.

Risk Score (6-Point Scoring System)				Risk Classification
Total Points	Patients (n = 95) *	AEF	Rate of AEF (%)	Risk Category	Patients	AEF	Rate of AEF, % (95% CI)
0	10	0	0.0	Low risk	46	2	4.3(0.5–14.8)
1	13	0	0.0
2	23	2	8.7
3	35	6	17.1	High risk	49	12	24.5(13.3–38.9)
4	11	5	45.5
5	2	1	50.0
6	1	0	0.0

AEF: arterial–esophageal fistula; 95% CI: 95% confidence interval; HEARTS-score consists of hematemesis, active bleeding, renal function (serum creatinine level > 1.2 mg/dL), prothrombin time > 13 s, previous stent implantation; low risk is defined as a HEARTS-Score of 0–2 points, while high risk is defined as a HEARTS-Score of 3–6 points. * There were missing data in seven cases.