Emergency vs elective presentation as a care-delivery phenotype in presumed early-stage lung cancer: A National Inpatient analysis.

e23223 Background: Early-stage lung cancer is potentially curable with surgery, yet emergency or nonelective presentation represents a care-delivery phenotype reflecting failures in early diagnosis or access to care rather than tumor biology alone. The national impact of emergency presentation among surgically treated, presumed early-stage lung cancer patients is poorly defined. This study evaluates emergency versus elective presentation as a care-delivery phenotype and its association with perioperative morbidity, failure-to-rescue, and inpatient outcomes. Methods: A survey-weighted analysis of the National Inpatient Sample (2016–2023) was conducted. Adult lung cancer hospitalizations were identified using ICD-10-CM C34* in any diagnosis position. A presumed early-stage surgical cohort was defined by curative-intent lung resection without metastatic disease, malignant pleural effusion, or palliative care coding. The primary exposure was nonelective versus elective admission. Outcomes included in-hospital mortality; ICU-level care, defined by invasive mechanical ventilation, shock, or respiratory failure; major complications; failure-to-rescue; length of stay; and hospitalization cost and charges. Multivariable survey-weighted models adjusted for patient demographics, payer, neighborhood income, hospital characteristics, and year. Results: In the weighted cohort of 422,925 hospitalizations, nonelective admission occurred in 27.3%. After multivariable adjustment, nonelective admission was independently associated with higher odds of in-hospital mortality (adjusted odds ratio [aOR] 2.59, 95% CI 2.22–3.03), ICU-level care (aOR 4.53, 95% CI 4.32–4.76), and major complications (aOR 5.00, 95% CI 4.78–5.23), as well as longer length of stay (+2.42 days). Notably, failure-to-rescue among patients with major complications did not differ by admission type (aOR 0.90, 95% CI 0.77–1.05), indicating that excess mortality associated with nonelective presentation is driven by presentation severity and care pathway rather than differences in rescue quality. In unadjusted analyses, nonelective presentation was associated with higher mortality (2.21% vs 0.68%), greater ICU-level care use (33.8% vs 8.9%), more frequent major complications (45.0% vs 12.4%), and longer length of stay (7.84 vs 4.99 days) compared with elective admissions. Conclusions: In a procedure-defined, presumed early-stage lung cancer surgical cohort, nonelective admission identifies a common care-delivery failure phenotype associated with higher perioperative morbidity, ICU-level care, in-hospital mortality, and longer hospitalization. Emergency presentation represents a systems-level vulnerability in curative-intent lung cancer care and serves as a scalable and actionable marker for quality improvement and disparity-focused analyses.