Postoperative geriatric syndromes significantly worsen outcomes for older patients undergoing major surgeries.

• 10.9% of patients developed new-onset geriatric syndromes, increasing the risk of 30-day complications by 3.53 times.
• Patients with these syndromes had 16 fewer days at home in the first 90 days post-discharge (66 vs. 82.5 days).

Geriatric syndromes also doubled the 1-year mortality risk (HR 2.32).

• Predictors of developing syndromes included older age and higher comorbidity.

Surgeons should prioritize perioperative care to mitigate these risks.