Document Type : Research Articles
Department of Thoracic and Breast Surgery, Faculty of Medicine, University of Miyazaki, Kihara 5200, Kiyotake, Miyazaki, 889-1692, Japan.
Department of Cardiovascular Surgery, Faculty of Medicine, University of Miyazaki, Kihara 5200, Kiyotake, Miyazaki, 889-1692, Japan.
Background: Previous study developed a new inflammatory prognostic index (IPI) and found the prognostic value
of IPI for all stage non-small cell lung cancer (NSCLC). To the best of our knowledge, however, no studies regarding
IPI in patients with resected NSCLC are available. Methods: Three hundred forty-one NSCLC patients who underwent
surgery at our institution were included. The IPI was calculated as C-reactive protein × neutrophil-to-lymphocyte ratio
(NLR)/serum albumin. The optimal cut-off value was calculated by the Cutoff Finder. Univariate and multivariate
analyses were calculated by the Cox proportional hazards regression model. Results: The optimal cut-off value was
5.237 for IPI. The IPI was associated with age, gender, smoking status, histology, pT status and serum CYFRA21-1
level, but not pStage, pN status and serum carcinoembryonic antigen level. The 5-year cancer-specific survival of
patients with low IPI was significantly better than that with high IPI (84.8% vs. 57.9%, p< 0.001). Furthermore, low IPI
was significantly associated with favorable cancer-specific survival in univariate (HR =0.326, 95% CI =0.212-0.494;
p<0.001) and multivariate (HR =0.438, 95% CI =0.276-0.690; p=0.001) analyses. Conclusion: This is the first study
to demonstrate that IPI might serve as an efficient prognostic indicator in resected NSCLC.