Background: There is a literature gap for hospitals in single-payer health care systems quantifying the influence of hospital volume on outcomes after major lung cancer resection. We aimed to determine the effect of hospital volume on mortality and length of stay.
Methods: A retrospective cohort study using administrative, population-based data from a single-payer universal health care system was performed in adults with non-small cell lung cancer who underwent lobectomy or pneumonectomy between 2008 and 2017. Hospital volume was defined as the average annual number of major lung resections performed at each institution. Length of stay and postoperative mortality were compared using multivariable linear and nonlinear regression between hospital volume categories and continuously. Adjusted association between hospital volume and postoperative mortality was determined by multivariable logistic regression.
Results: In all, 10 831 lung resections were performed: 1237 pneumonectomies and 9594 lobectomies. Patients undergoing lobectomy at high-volume hospitals had shorter median length of stay (6 vs 8 days, P = .001) compared with low-volume hospitals. After adjusting for confounders, surgery at a high-volume center was significantly associated with shorter length of stay after lobectomy and overall resections (P ≤ .001), but not after pneumonectomy (P = .787). Surgery at a high-volume center was positively associated with improved 90-day mortality in lobectomy and overall procedures (odds ratio 0.607 [95% confidence interval, 0.399 to 0.925], and 0.632 [95% confidence interval, 0.441 to 0.904], respectively). Volume was not a predictor of 90-day mortality after pneumonectomy (odds ratio 0.533 [95% confidence interval, 0.257 to 1.104], P = .090).
Conclusions: Surgery at a high-volume center was positively correlated with improved 90-day survival and shorter hospital length of stay. The results support regionalized lung cancer care in a single-payer health care system.
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