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Table 1 Characteristics of patients with gastric neuroendocrine tumour in SEER database before propensity score matching

From: Marital status, an independent predictor for survival of gastric neuroendocrine neoplasm patients: a SEER database analysis

Variable Overall (n = 3947) Married (n = 2377; 60.2%) Divorced/Separated (n = 408; 10.3%) Single (n = 646; 16.4%) Widowed (n = 516; 13.1%) P
Demographic parameters
 Age at diagnosis       < 0.001
  ≤ 50 938 574 (61.2%) 90 (9.6%) 271 (28.9%) 3 (0.3%)  
  51–70 1930 1243 (64.4%) 240 (12.4%) 293 (15.2%) 154 (8.0%)  
  > 70 1079 560 (51.9%) 78 (7.2%) 82 (7.6%) 359 (33.3%)  
 Sex       < 0.001
  Male 1571 1121 (72.1%) 135 (8.2%) 248 (14.4%) 67 (5.3%)  
  Female 2376 1256 (51.7%) 273 (12.2%) 398 (16.4%) 449 (19.8%)  
 Year of diagnosis       < 0.001
  1973–1995 254 172 (67.7%) 19 (7.5%) 26 (10.2%) 37 (14.6%)  
  1996–2005 1120 659 (58.8%) 107 (9.6%) 166 (14.8%) 188 (16.8%)  
  2006–2010 1127 686 (60.9%) 118 (10.5%) 184 (16.3%) 139 (12.3%)  
  2011–2015 1446 860 (59.5%) 164 (11.3%) 270 (18.7%) 152 (10.5%)  
 Ethnicity       < 0.001
  White 3099 1945 (62.8%) 306 (9.9%) 456 (14.7%) 392 (12.6%)  
  Black 563 234 (41.6%) 82 (14.6%) 158 (28.1%) 89 (15.8%)  
  Others 252 175 (69.4%) 20 (7.9%) 26 (10.3%) 31 (12.3%)  
  Unknown 33 23 (69.7%) 0 (0%) 6 (18.2%) 4 (12.1%)  
Clinicopathological parameters
 Grade       0.07
  Well differentiated 1144 679 (59.4%) 125 (10.9%) 210 (18.4%) 130 (11.4%)  
  Moderately differentiated 258 168 (65.1%) 24 (9.3%) 45 (17.4%) 21 (8.1%)  
  Poorly differentiated 285 166 (58.2%) 33 (11.6%) 43 (15.1%) 43 (15.1%)  
  Undifferentiated 73 42 (57.5%) 5 (6.8%) 13 (17.8%) 13 (17.8%)  
  Unknown 2187 1322 (60.4%) 221 (10.1%) 335 (15.3%) 309 (14.1%)  
 Tumour stage       0.19
  Localized 2635 1612 (61.2%) 278 (10.6%) 416 (15.8%) 329 (12.5%)  
  Regional 241 151 (62.7%) 27 (11.2%) 40 (16.6%) 23 (9.5%)  
  Distant 463 271 (58.5%) 43 (9.3%) 81 (17.5%) 68 (14.7%)  
  Unknown 608 343 (56.4%) 60 (9.9%) 109 (17.9%) 96 (15.8%)  
 Size (cm)       0.02
  ≤ 5 79 57 (72.2%) 8 (10.1%) 5 (6.3%) 9 (11.4%)  
  5.1–10.0 104 60 (57.7%) 7 (6.7%) 18 (17.3%) 19 (18.3%)  
  > 10.0 229 146 (63.8%) 23 (10.0%) 22 (9.6%) 38 (16.6%)  
  Unknown 3535 2114 (59.8%) 370 (10.5%) 601 (17.0%) 450 (12.7%)  
 Surgery       < 0.001
  Performed 2391 1498 (62.7%) 244 (10.2%) 376 (15.7%) 273 (11.4%)  
  Not Performed 1482 841 (56.7%) 152 (10.3%) 252 (17.0%) 237 (16.0%)  
  Unknown 74 38 (51.4%) 12 (16.2%) 18 (24.3%) 6 (8.1%)