Table 1. Basic characteristics.
| Married N (%) N = 17854 | Unmarried N (%) N = 11220 | P value | |||
|---|---|---|---|---|---|
| Widowed N = 4353 | Single N = 4139 | Separated/Divorced N = 2728 | |||
| Sex | <0.001 | ||||
| Male | 12,841(71.92) | 1,325 (30.44) | 2,564 (61.95) | 1,554 56.96) | |
| Female | 5,013 (28.08) | 3,028 (69.56) | 1,575 (38.05) | 1,174 (43.04) | |
| Age (Mean ± SD) | 64.5 ± 13.0 | 78.2 ± 9.4 | 58.3 ± 15.2 | 63.3 ± 11.9 | <0.001 |
| Race/Ethnicity | <0.001 | ||||
| Caucasian | 12,829 (71.85) | 2,971 (68.25) | 2,654 (64.12) | 1,909 (69.98) | |
| African-American | 1,553 (8.70) | 659 (15.14) | 973 (23.51) | 500 (18.33) | |
| Asian | 3,137 (17.57) | 647 (14.86) | 413 (10.00) | 257 (9.42) | |
| Others | 309 (1.73) | 74 (1.70) | 97 (2.34) | 56 (2.05) | |
| Unknown | 26 (0.15) | 2 (0.05) | 2 (0.03) | 6 (0.22) | |
| Insurance status | <0.001 | ||||
| Uninsured | 401 (2.24) | 35 (0.80) | 276 (6.67) | 100 (3.67) | |
| Insured | 11,260 (63.07) | 2,684 (61.66) | 2,579 (62.31) | 1,673 (61.33) | |
| Unknown | 6193 (34.69) | 1634 (37.54) | 1284 (31.02) | 955 (35.00) | |
| Location | <0.001 | ||||
| Cardia | 6,096 (34.14) | 940 (21.59) | 1,198 (28.94) | 900 (33.00) | |
| Fundus | 636 (3.56) | 167 (3.84) | 135 (3.26) | 110 (4.03) | |
| Body | 1,509 (8.45) | 422 (9.69) | 346 (8.36) | 247 (9.05) | |
| Antrum/Pylorus | 3,991 (22.35) | 1,326 (30.46) | 1002 (24.21) | 579 (21.22) | |
| Lesser/Greater curvature | 2,168 (12.14) | 564 (12.96) | 484 (11.69) | 330 (12.10) | |
| Others | 3,454 (19.36) | 934 (21.46) | 974 (23.54) | 562 (20.60) | |
| AJCC 6th TNM stage | <0.001 | ||||
| I | 4,976 (27.87) | 1,601 (36.78) | 982 (23.73) | 728 (26.69) | |
| II | 2,581 (14.46) | 582 (13.37) | 546 (13.18) | 350 (12.83) | |
| III | 2,521 (14.12) | 552 (12.68) | 564 (13.63) | 379 (13.89) | |
| IV | 7,776 (43.55) | 1,618 (37.17) | 2,047 (49.46) | 1,271 (46.59) | |
| Lymph node removed | <0.001 | ||||
| 1–3 | 746 (4.18) | 215 (4.94) | 177 (4.29) | 110 (4.03) | |
| >3 | 8,779 (49.17) | 1,827 (41.97) | 1,707 (41.24) | 1,217 (44.61) | |
| Unknown | 8,329 (46.65) | 2,311 (53.09) | 2,261 (54.47) | 1,401 (51.36) | |
| Histology subgroup | <0.001 | ||||
| Signet Ring cell | 3,910 (21.90) | 724 (16.63) | 1,063 (25.68) | 597 (21.88) | |
| Mucinous adenocarcinoma | 420 (2.35) | 114 (2.62) | 120 (2.90) | 63 (2.31) | |
| Adenocarcinoma | 13,524 (75.75) | 3,515 (80.75) | 2,965 (71.42) | 2,068 (75.81) | |
| Grade | <0.001 | ||||
| Well differentiated | 640 (3.58) | 212 (4.87) | 109 (2.63) | 104 (3.81) | |
| Moderately differentiated | 4,067 (22.78) | 1,137 (26.12) | 884 (21.36) | 620 (22.73) | |
| Poorly differentiated | 10,512 (58.88) | 2,349 (53.96) | 2,480 (59.92) | 1,552 (56.89) | |
| Undifferentiated | 351 (1.97) | 76 (1.75) | 67 (1.62) | 46 (1.69) | |
| Unknown | 2,284 (12.79) | 579 (13.30) | 599 (14.47) | 406 (14.88) | |
| Therapy (Surgery ± radiotherapy) | <0.001 | ||||
| None | 5,794 (32.45) | 1,548 (35.56) | 1,352 (32.66) | 967 (35.45) | |
| Therapy | 10,111 (56.63) | 2,314 (53.16) | 2,221 (53.66) | 1,449 (53.12) | |
| Unknown | 1,949 (10.92) | 491 (11.28) | 566 (13.67) | 312 (11.43) | |
SD: Standard deviation.
NOS: Not otherwise specified.
AJCC: American Joint Committee on Cancer.
TNM: Tumor-Node-Metastasis.