Table 1.
Demographic characteristics of gastric cancer patients who underwent gastrectomy with or without neoadjuvant/adjuvant treatment from 2002 to 2013
| Characteristic | Total | Neoadjuvant/Adjuvant (–)a) | Neoadjuvant/Adjuvant (+)a) | p-value |
|---|---|---|---|---|
| Sex | ||||
| Male | 2,436 (67) | 1,209 (66) | 1,227 (67) | 0.320 |
| Female | 1,217 (33) | 625 (34) | 592 (33) | |
| Age (yr) | ||||
| 20-49 | 770 (21) | 384 (21) | 386 (21) | 0.008 |
| 50-59 | 901 (25) | 442 (24) | 459 (25) | |
| 60-69 | 1,110 (30) | 529 (29) | 581 (32) | |
| 70-89 | 872 (24) | 480 (26) | 392 (22) | |
| Surgery type | ||||
| TG | 822 (23) | 305 (17) | 517 (28) | < 0.001 |
| STG/PG | 2,831 (77) | 1,529 (83) | 1,302 (72) | |
| LND use | ||||
| No | 83 (3) | 39 (2) | 44 (3) | 0.523 |
| Yes | 3,213 (97) | 1,602 (98) | 1,610 (97) | |
| Charlson comorbidity index | ||||
| 0-1 | 2,216 (61) | 1,077 (59) | 1,139 (63) | 0.054 |
| 2 | 702 (19) | 375 (20) | 327 (18) | |
| 3 | 316 (9) | 172 (9) | 144 (8) | |
| ≥ 4 | 419 (11) | 211 (11) | 209 (11) | |
| Income | ||||
| ≤ 20 percentile | 562 (15) | 285 (16) | 277 (15) | 0.015 |
| 21-80 percentile | 1,917 (52) | 923 (50) | 995 (55) | |
| ≥ 81 percentile | 1,174 (32) | 627 (34) | 547 (30) | |
| Health insurance type | ||||
| NHI | 3,532 (97) | 1,770 (96) | 1,761 (97) | 0.556 |
| Medical aid | 122 (3) | 64 (4) | 58 (3) | |
| Residential area | ||||
| Metropolitan | 1,663 (46) | 804 (44) | 859 (47) | 0.035 |
| Non-metropolitan | 1,991 (54) | 1,031 (56) | 960 (53) | |
| Hospital location | ||||
| Metropolitan | 3,161 (87) | 1,567 (85) | 1,594 (88) | 0.051 |
| Non-metropolitan | 493 (13) | 267 (15) | 225 (12) | |
| Hospital volume (beds) | ||||
| < 1,000 | 1,503 (41) | 738 (40) | 765 (42) | 0.265 |
| ≥ 1,000 | 2,151 (59) | 1,096 (60) | 1,054 (58) | |
| Disabled status | ||||
| No | 3,295 (90) | 1,641 (89) | 1,654 (91) | 0.132 |
| Yes | 358 (10) | 193 (11) | 165 (9) |
Values are presented as number (%). TG, total gastrectomy; STG/PG, subtotal gastrectomy/partial gastrectomy; LND, lymph node dissection; NHI, National Health Insurance.
a)
Patients who received chemotherapy and/or radiotherapy before and after the surgery within 3 months were considered as (neo-)adjuvant group.