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. 2021 Jun 9;25(12):3188–3197. doi: 10.1007/s11605-021-04994-3

Table 2.

Survival analysis of the clinicopathologic factors in LND group before and after PSM matching

Characteristics 10 years 10 years
Before PSM (n = 2652) P value After PSM (n = 2048) P value
Age, years < 0.001 < 0.001
≤ 60 90.3 ± 1.2 90.7 ± 1.3
> 60 65.5 ± 2.3 69.1 ± 2.8
Sex 0.610 0.800
Male 78.0 ± 1.8 82.9 ± 1.9
Female 80.4 ± 1.7 81.5 ± 1.9
Race 0.651 0.727
White 79.1 ± 1.3 82.1 ± 1.5
Black 78.8 ± 4.6 82.9 ± 3.5
Others 74.7 ± 10.5 82.3 ± 10.3
Unknown -
Primary location 0.023 0.989
Jejunum 66.8 ± 6.2 82.2 ± 1.4
Ileum 80.1 ± 1.3 80.7 ± 7.1
Tumor size, cm < 0.001 < 0.001
≤ 1 85.2 ± 2.1 90.0 ± 2.0
1–5 77.3 ± 1.6 79.8 ± 1.7
> 5 62.9 ± 10.1 65.6 ± 9.8
Histologic typea 0.249 0.071
8240 79.3 ± 1.4 83.1 ± 1.4
8246 78.5 ± 3.4 78.1 ± 4.0
8249 75.2 ± 12.6 65.5 ± 16.4
Surgery 0.806 0.429
Simple resection 78.0 ± 1.7 83.0 ± 1.7
Partial resection 81.6 ± 2.3 82.1 ± 2.5
Total resection 79.9 ± 3.5 78.9 ± 3.9
Tumor differentiation 0.102 0.040
Well 80.7 ± 2.1 85.0 ± 1.9
Moderate 77.5 ± 3.6 75.6 ± 4.4
Poor 58.3 ± 16.8 45.5 ± 32.4
Undifferentiated -
Unknown 78..4 ± 1.8 80.9 ± 2.1
AJCC T status < 0.001 < 0.001
T1 88.4 ± 2.8 88.4 ± 2.8
T2 87.0 ± 2.3 87.0 ± 2.3
T3 79.8± 2.4 79.8± 2.4
T4 75.3 ± 3.1 74.6 ± 3.6
N stage 0.441 0.481
N0 77.7 ± 2.6 80.5 ± 3.0
N1 79.3 ± 1.5 82.5 ± 1.5
N2 86.3 ± 6.6 86.9 ± 7.0
TNM stage 0.701 0.654
I 84.9 ± 42.1 86.8 ± 4.1
II 74.7 ± 2.3 78.5 ± 4.3
III 79.3 ± 1. 4 82.3 ± 1. 5
ELNs < 0.001 0.003
1–14 75.8 ± 1.7 80.0 ± 1.9
≥ 15 84.6 ± 1.8 84.1 ± 1.9
NLNs < 0.001 0.004
1–9 75.3 ± 1.8 75.2 ± 1.9
≥ 10 83.2 ± 1.8 84.4 ± 1.7

AJCC American Joint Committee on Cancer, TNM tumor-node-metastasis, ELNs examined lymph nodes,NLN snegative examined lymph nodes

aInternational Classification of Diseases for Oncology, 3rd Edition (ICD-O-3): 8240, Carcinoid tumor; 8246, Carcinoid carcinoma; 8249, Atypical carcinoid tumor