Cox regression models analyzing the association between education level and mortality after esophagectomy for cancer, using multiple imputation for missing values.

Values are expressed as hazard ratios (HRs) and 95% confidence intervals (CIs).
* Adjusted for age (≤61, 62–70, or >70 years), sex (male or female), comorbidity (0, 1, or >1), tumor stage (0-I, II, III, or IV), and tumor histology (squamous cell carcinoma or adenocarcinoma).
# Conditional mortality: excluding first 90 days after surgery.
Cox regression models analyzing the association between education level and mortality after esophagectomy for cancer, using multiple imputation for missing values.