TABLE 1.
Clinical characteristics of the 5283 investigated esophageal cancer patients
| No. of patients | No. of deaths | |
|---|---|---|
| Characteristics | n (%) | n (%) |
| Total no. of cases | 5283 (100) | 3158 (100) |
| Gender | ||
| Male | 3974 (75.22) | 2431 (76.98) |
| Female | 1309 (24.78) | 727 (23.02) |
| Age (years) | ||
| ≤44 | 117 (2.21) | 61 (1.93) |
| 45‐54 | 860 (16.28) | 477 (15.10) |
| 55‐64 | 2215 (41.93) | 1268 (40.15) |
| 65‐74 | 1568 (29.68) | 977 (30.94) |
| ≥75 | 523 (9.90) | 375 (11.87) |
| Marital status | ||
| Married | 5173 (97.92) | 3082 (97.59) |
| Not married | 93 (1.76) | 66 (2.09) |
| Missing data | 17 (0.32) | 10 (0.32) |
| Occupation | ||
| Enterprise personnel | 502 (9.50) | 253 (8.01) |
| Production and service personnel | 565 (10.69) | 290 (9.18) |
| Farming/fishing | 3910 (74.01) | 2390 (75.68) |
| Missing data | 306 (5.79) | 225 (7.12) |
| BMI * (kg/m2) | ||
| <18.5 | 381 (7.21) | 241 (7.63) |
| 18.5‐23.0 | 2615 (49.50) | 1553 (49.18) |
| ≥23.0 | 1431 (27.09) | 878 (27.80) |
| Missing data | 856 (16.20) | 486 (15.39) |
| Blood type | ||
| A | 1518 (28.73) | 840 (26.60) |
| B | 1502 (28.43) | 943 (29.86) |
| O | 1438 (27.22) | 887 (28.09) |
| AB | 455 (8.61) | 270 (8.55) |
| Missing data | 370 (7.00) | 218 (6.90) |
| Smoking status | ||
| Never‐smoker | 2489 (47.11) | 1441 (45.63) |
| Smoker | 2742 (51.90) | 1677 (53.10) |
| Missing data | 52 (0.98) | 40 (1.27) |
| Drinking status | ||
| Never‐drinker | 2250 (42.59) | 1540 (48.77) |
| Drinker | 2189 (41.43) | 1423 (45.06) |
| Missing data | 844 (15.98) | 195 (6.17) |
| Family history of any cancer | ||
| Absent | 4115 (77.89) | 2522 (79.86) |
| Present | 1090 (20.63) | 575 (18.21) |
| Missing data | 78 (1.48) | 61 (1.93) |
| Tumor topographical site | ||
| Cervical part | 575 (10.88) | 352 (11.15) |
| Thoracic part | 3123 (59.11) | 1804 (57.12) |
| Abdominal part | 895 (16.94) | 545 (17.26) |
| Overlapping lesion of the esophagus | 452 (8.56) | 295 (9.34) |
| Missing data | 238 (4.51) | 162 (5.13) |
| Pathological type | ||
| Squamous cell carcinoma | 4506 (85.29) | 2646 (83.79) |
| Adenocarcinoma | 125 (2.37) | 79 (2.50) |
| Adenosquamous carcinoma | 67 (1.27) | 44 (1.39) |
| Other types | 161 (3.05) | 109 (3.45) |
| Missing data | 424 (8.03) | 280 (8.87) |
| Differentiation status | ||
| High differentiation | 805 (15.24) | 413 (13.08) |
| Moderate differentiation | 1702 (32.22) | 1006 (31.86) |
| Poor/Undifferentiated | 1414 (26.77) | 893 (28.28) |
| Missing data | 1362 (25.78) | 846 (26.79) |
| Pathological stage | ||
| I | 741 (14.03) | 273 (8.64) |
| II | 1413 (26.75) | 753 (23.84) |
| III | 1319 (24.97) | 852 (26.98) |
| IV | 885 (16.75) | 659 (20.87) |
| Missing data | 925 (17.51) | 621 (19.66) |
*
Body mass index