Table 2.
Characteristics of 1822 patients undergoing oesophagectomy between 1987 and 2010 in Sweden, with follow-up until 28 February 2012
| Characteristics | Number (%) |
||
|---|---|---|---|
| No reoperation | Reoperation | ||
| Total | 1622 (89) | 200 (11) | p Value* |
| Sex | |||
| Men | 1211 (75) | 151 (75) | 0.8 |
| Women | 411 (25) | 49 (25) | |
| Age | |||
| ≤64 | 754 (46) | 93 (47) | 0.9 |
| 65–75 | 615 (38) | 78 (39) | |
| >75 | 253 (16) | 29 (14) | |
| Comorbidity† | |||
| None | 832 (51) | 107 (54) | 0.8 |
| 1 | 542 (34) | 63 (31) | |
| ≥2 | 248 (15) | 30 (15) | |
| Stage‡ | |||
| 0–I | 339 (20) | 41 (20) | 0.9 |
| II | 532 (33) | 71 (35) | |
| III | 399 (25) | 46 (23) | |
| IV | 127 (8) | 13 (7) | |
| Missing§ | 225 (14) | 29 (15) | |
| Histology | |||
| Adenocarcinoma | 645 (40) | 70 (35) | 0.09 |
| Squamous cell carcinoma | 880 (54) | 123 (62) | |
| Missing§ | 97 (6) | 7 (3) | |
| Neoadjuvant therapy | |||
| None | 677 (42) | 85 (43) | 0.4 |
| Radiotherapy | 154 (9) | 26 (13) | |
| Chemoradiotherapy | 302 (19) | 35 (17) | |
| Missing§ | 489 (30) | 54 (27) | |
| Radicality | |||
| R0 | 1135 (69) | 137 (68) | 0.7 |
| Not R0 | 251 (16) | 30 (15) | |
| Missing§ | 236 (15) | 33 (17) | |
| Surgeon volume | |||
| <9 per year | 875 (54) | 122 (61) | 0.06 |
| ≥9 per year | 747 (46) | 78 (39) | |
| Calendar period | |||
| 1987–1990 | 234 (14) | 34 (17) | 0.2 |
| 1991–1994 | 302 (19) | 43 (22) | |
| 1995–1999 | 330 (20) | 49 (25) | |
| 2000–2005 | 382 (24) | 37 (19) | |
| 2006–2010 | 374 (23) | 37 (19) | |
*χ2 of the difference between groups.
†Comorbidity included: hypertension, ischaemic heart disease, cardiac failure, chronic obstructive pulmonary disease, asthma, diabetes, former cancer diagnosis, HIV, liver disease and renal disease.
‡Categorised according to the sixth version of the Union for International Cancer Control (UICC)-TNM (tumour, node, metastasis) classification.
§Missing values of covariates were missing at random and considered as a separate group.