Multivariable Cox regression models analysing the association between education level and all-cause 5-year mortality after oesophagectomy for cancer, stratified by tumour histology and expressed as HRs with 95% CI
| Level of education* | Total number (%) | |||
|---|---|---|---|---|
| ≥13 years (Reference) | 10–12 years HR (95% CI) | ≤9 years HR (95% CI) | ||
| Overall 5-year mortality | 55/81 (67.9) | 180/238 (75.6) | 216/281 (76.9) | 451/600 (75.2) |
| Model 1 | ||||
| Adenocarcinoma | 1 | 1.20 (0.85 to 1.70) | 1.41 (1.00 to 1.98) | 454 (75.7) |
| Squamous cell carcinoma | 1 | 1.00 (0.55 to 1.83) | 0.99 (0.55 to 1.78) | 146 (24.3) |
| Model 2 | ||||
| Adenocarcinoma | 1 | 1.03 (0.72 to 1.46) | 1.07 (0.75 to 1.52) | 454 (75.7) |
| Squamous cell carcinoma | 1 | 1.06 (0.57 to 1.97) | 1.01 (0.55 to 1.87) | 146 (24.3) |
| Model 3 | ||||
| Adenocarcinoma | 1 | 1.11 (0.77 to 1.58) | 1.13 (0.79 to 1.62) | 454 (75.7) |
| Squamous cell carcinoma | 1 | 1.26 (0.65 to 2.44) | 1.18 (0.61 to 2.30) | 146 (24.3) |
Values are expressed as HRs or as number of patients (%).
Model 1: unadjusted; model 2: adjusted for sex and age; model 3: adjusted for sex, age, tumour stage, major complications, comorbidity and surgeon volume.
*Level of education: ≥13 years: postsecondary education; 10–12 years: upper secondary education; ≤9 years: compulsory education.