Multivariable logistic regression analysis
The effects of training on post-operative and survival outcomes are
expressed as odds and hazard ratio’s in Table 3. Effect sizes were
corrected for age, stage (<2/≥2) and grade (low grade/high
grade) using multivariable logistic regression and cox proportional
hazard analysis. Variables were included in multivariable logistic and
cox proportional hazard analyses if they rendered clinical relevance and
showed a significant effect on disease-free and disease-specific
survival in univariate regression analysis.
After correction training did not increase the odds ratio’s (OR) for
intra-operative complications (0.6, p = 0154), post-operative
complications (1, p = 0.994), Clavien-Dindo complications, (0.9, p =
0.583), readmissions < 30 days (0.6, p = 0.202), return to
theatre (0.6, p = 0.553) or lymphoedema (0.6, p = 0.110). Training cases
had a lower odds for LOS > 1day (0.6, p = 0.004).