Research Article
Establishment and Validation for Predicting the Lymph Node Metastasis in Early Gastric Adenocarcinoma
Table 1
Characteristics of all patients.
| | Variables | Clinical data (n = 494) | SEER data | | Total (n = 842) | Training set (n = 505) | Test set (n = 337) |
| | Age (years), mean ± SD | 53.80 ± 10.60 | 69.4 ± 11.3 | 69.05 ± 11.76 | 69.80 ± 10.71 |
| | Gender, n (%) | | Female | 218 (44.13) | 357 (42.40) | 214 (42.38) | 143 (42.43) | | Male | 276 (55.87) | 485 (57.60) | 291 (57.62) | 194 (57.57) |
| | T stage, n (%) | | T1a | 243 (49.19) | 306 (36.34) | 176 (34.85) | 130 (38.58) | | T1b | 251 (50.81) | 536 (63.66) | 329 (65.15) | 207 (61.42) |
| | Primary site, n (%) | | Overlap | 13 (2.63) | 59 (7.01) | 41 (8.12) | 18 (5.34) | | Lower | 348 (70.45) | 455 (54.04) | 267 (52.87) | 188 (55.79) | | Middle | 120 (24.29) | 303 (35.99) | 185 (36.63) | 118 (35.01) | | Upper | 13 (2.63) | 25 (2.97) | 12 (2.38) | 13 (3.86) |
| | Type, n (%) | | Diffuse | 302 (61.13) | 69 (8.19) | 36 (7.13) | 33 (9.79) | | Intestinal | 16 (3.24) | 700 (83.14) | 424 (83.96) | 276 (81.90) | | Others | 176 (35.63) | 73 (8.67) | 45 (8.91) | 28 (8.31) |
| | Tumor size (cm), n (%) | | 1- | 130 (26.32) | 148 (17.58) | 135 (26.73) | 110 (32.64) | | 2- | 151 (30.57) | 245 (29.10) | 117 (23.17) | 57 (16.91) | | 3- | 122 (24.70) | 174 (20.67) | 60 (11.88) | 53 (15.73) | | 4- | 57 (11.54) | 113 (13.42) | 101 (20.00) | 61 (18.10) | | <1 | 34 (6.88) | 162 (19.24) | 92 (18.22) | 56 (16.62) |
| | Grade, n (%) | | I | 314 (63.56) | 143 (16.98) | 78 (15.45) | 65 (19.29) | | II | 128 (25.91) | 334 (39.67) | 206 (40.79) | 128 (37.98) | | III | 52 (10.53) | 365 (43.35) | 221 (43.76) | 144 (42.73) |
| | LNM, n (%) | | No | 361 (73.08) | 666 (79.10) | 398 (78.81) | 268 (79.53) | | Yes | 133 (26.92) | 176 (20.90) | 107 (21.19) | 69 (20.47) |
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Note: LNM: lymph node metastasis.
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