borderline significantp = 0.044
The risk of a severe complication (Grade ≥ 3) was higher in patients with an additional intervention (24.2%) compared to patients without an additional intervention (6.6%, p = 0.011) and this was borderline significant when corrected for residual tumor size (OR 3.46; 95% CI 1.03–11.60; p = 0.044; Supplementary Table 3).