Evidence map›Paper›PMID 27469339›Full record

ArticleThe Annals of thoracic surgery2017

Does Lymph Node Count Influence Survival in Surgically Resected Non-Small Cell Lung Cancer?

Elizabeth A David, David T Cooke, Yingjia Chen, Kieranjeet Nijar, Robert J Canter, Rosemary D Cress

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Article in The Annals of thoracic surgery, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Elizabeth A DavidSection of General Thoracic Surgery, UC Davis Medical Center, Sacramento, California; Heart Lung Vascular Center, David Grant Medical Center, Travis AFB, California. Electronic address: eadavid@ucdavis.edu.
David T CookeSection of General Thoracic Surgery, UC Davis Medical Center, Sacramento, California.
Yingjia ChenDepartment of Public Health Sciences, UC Davis School of Medicine, Davis, California.
Kieranjeet NijarGeorgetown University School of Medicine, Washington, DC.
Robert J CanterDivision of Surgical Oncology, Department of Surgery, UC Davis Medical Center, Sacramento, California.
Rosemary D CressDepartment of Public Health Sciences, UC Davis School of Medicine, Davis, California; Public Health Institute, Cancer Registry of Greater California, Sacramento, California.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe prognostic significance of the number of lymph nodes sampled (NLNS) during resection for non-small cell lung cancer (NSCLC) is unclear. The NLNS is influenced by many factors, and some have argued that it should be a surrogate for quality. We sought to determine the influence of the NLNS on overall survival and cancer-specific survival for surgically resected NSCLC.

methodsThe California Cancer Registry was queried from 2004 to 2011 for cases of stage I to III NSCLC treated with surgical resection, identifying 16,393 patients. Kaplan-Meier and Cox proportional hazards modeling were used to determine the influence of NLNS on overall survival and cancer-specific survival.

resultsIn all, 15,195 patients had information regarding nodal sampling. Eighty percent (13,167 of 15,195) were treated with lobectomy. Patients who were younger, male, non-Hispanic white, highest socioeconomic status, higher stage, or larger size tumor had more nodes removed. Sampling fewer than 10 nodes was associated with poorer overall survival when compared with sampling 10 or more nodes after adjustment for demographic and clinical factors for stage I: overall survival hazard ratio 1.78 (95% confidence interval: 1.54 to 2.05, p < 0.0001), hazard ratio 1.43 (95% confidence interval: 1.27 to 1.59, p < 0.0001), and hazard ratio 1.16 (95% confidence interval: 1.05 to 1.28, p = 0.004), for 0, 1 to 3, and 4 to 10 nodes, respectively. Of patients who underwent sublobar resection, 43.8% had no nodes sampled.

conclusionsFor NSCLC, the NLNS influenced both overall survival and cancer-specific survival, but the influence is dependent on stage. Surgeons should perform mediastinal lymphadenectomy to maximize patient survival, but the optimal NLNS remains unclear.

Indexed as

Neoplasm StagingPneumonectomyAgedCaliforniaCarcinoma, Non-Small-Cell LungCross-Sectional StudiesFemaleFollow-Up StudiesHumansLung NeoplasmsLymphatic MetastasisLymph Node ExcisionLymph NodesMaleMediastinumPrognosis

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.