<p>Multivariate survival analysis.</p>

However, the impact of postoperative complications on survival in patients aged ≥80 years remains unclear. This study aimed to evaluate the association between postoperative complications and survival outcomes in patients aged ≥80 years with gastric cancer.</p> <p>Materials and methods</p><p>We retrospectively analyzed 61 patients aged ≥80 years who underwent gastrectomy with D2 lymph node dissection between 1999 and 2020.

Postoperative complications were classified according to the Clavien-Dindo (CD) classification into a “no or minor complication group” (CD Grade ≤ II, including no postoperative complications) and a “major complication group” (CD Grade ≥ III), and the impact of postoperative complications on survival outcomes were assessed. A subgroup analysis excluding macroscopic type 4 was also performed.</p> <p>Results</p><p>Postoperative complications occurred in 24 patients (39.3%), of which 8 (13.1%) experienced major complications.