Thirty-Day Mortality in Emergency Surgery: Clinical Risk Factors, Hospital Performance, and Epidemiological Strategies for Improving Surgical Outcomes

Thirty-day mortality following emergency surgery represents a critical indicator of postoperative outcomes, patient safety, and healthcare system performance. Despite advances in perioperative medicine and surgical management, substantial differences in mortality persist across healthcare settings, reflecting interactions between clinical risk factors, institutional resources, and healthcare delivery processes. This narrative review aimed to analyze thirty-day mortality after emergency surgery by examining its epidemiological distribution, principal clinical determinants, hospital performance indicators, surveillance practices, and opportunities for healthcare quality improvement, incorporating international evidence with particular attention to Latin America. A descriptive, analytical, and comparative approach was adopted, integrating published evidence from observational studies, multicenter cohorts, surgical audits, risk prediction investigations, and quality improvement research. The reviewed evidence identified substantial international variation in postoperative mortality, with reported thirty-day mortality rates of 4.5%, 6.0%, and 8.6% in high-, middle-, and low-Human Development Index settings, respectively. Approximately 70% of postoperative deaths in a major international emergency abdominal surgery cohort occurred after the first 24 hours, emphasizing the importance of extended surveillance. Advanced age, comorbidities, preoperative physiological instability, sepsis, and surgical complexity emerged as relevant mortality-associated factors. Risk-adjustment models demonstrated value for interpreting postoperative outcomes, while hospital organizational characteristics, incomplete post-discharge follow-up, and inconsistent mortality definitions complicated institutional comparisons. Latin American investigations contributed regional evidence but also highlighted the need for stronger surveillance systems and standardized reporting. Overall, thirty-day mortality should be understood as a multidimensional indicator reflecting both patient vulnerability and healthcare system characteristics. Integrating epidemiological surveillance, appropriate risk adjustment, multidisciplinary coordination, and continuous institutional evaluation may strengthen emergency surgical quality assessment. Further prospective research is required to establish the effectiveness of specific interventions in reducing postoperative mortality, particularly in resource-constrained healthcare settings.