Evidence map›Paper›PMID 28179026›Full record

ArticleChinese journal of cancer2017

Proportion and clinical features of never-smokers with non-small cell lung cancer.

Jaeyoung Cho, Sun Mi Choi, Jinwoo Lee, Chang-Hoon Lee, Sang-Min Lee, Dong-Wan Kim, Jae-Joon Yim, Young Tae Kim, Chul-Gyu Yoo, Young Whan Kim and 2 more

Abstract read
In one paragraph

Article in Chinese journal of cancer, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed, 3 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

54 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors.

Jaeyoung ChoDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Sun Mi ChoiDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Jinwoo LeeDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Chang-Hoon LeeDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Sang-Min LeeDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Dong-Wan KimDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Jae-Joon YimDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Young Tae KimDepartment of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Chul-Gyu YooDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Young Whan KimDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Sung Koo HanDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea.
Young Sik ParkDepartment of Internal Medicine, Seoul National University Hospital, Seoul, 110-744, Republic of Korea. mdyspark@gmail.com.ORCID http://orcid.org/0000-0003-0235-6943

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe proportion of never-smokers with non-small cell lung cancer (NSCLC) is increasing, but that in Korea has not been well addressed in a large population. We aimed to evaluate the proportion and clinical features of never-smokers with NSCLC in a large single institution.

methodsWe analyzed clinical data of 1860 consecutive patients who were newly diagnosed with NSCLC between June 2011 and December 2014.

resultsOf the 1860 NSCLC patients, 707 (38.0%) were never-smokers. The proportions of women (83.7% vs. 5.6%) and adenocarcinoma (89.8% vs. 44.9%) were higher among never-smokers than among ever-smokers. Significantly more never-smokers were diagnosed at a younger median age (65 vs. 68 years, P < 0.001) and earlier stage (stage I-II, 44.5% vs. 38.9%, P = 0.015) compared with ever-smokers. Epidermal growth factor receptor mutations (57.8% vs. 24.4%, P < 0.001) and anaplastic lymphoma kinase rearrangements (7.8% vs. 2.8%, P < 0.001) were more common in never-smokers, whereas Kirsten rat sarcoma viral oncogene homolog mutations (5.8% vs. 9.6%, P = 0.021) were less frequently encountered in never-smokers than in ever-smokers. Never-smokers showed longer survival after adjusting for the favorable effects of younger age, female sex, adenocarcinoma histology, better performance status, early stage disease, being asymptomatic at diagnosis, received antitumor treatment, and the presence of driver mutations (hazard ratio, 0.624; 95% confidence interval, 0.460-0.848; P = 0.003).

conclusionsMore than one-third of the Korean patients with NSCLC were never-smokers. NSCLC in never-smokers had different clinical characteristics and major driver mutations and resulted in longer overall survival compared with NSCLC in ever-smokers.

Indexed as

AgedAnaplastic Lymphoma KinaseCarcinoma, Non-Small-Cell LungErbB ReceptorsFemaleHumansKaplan-Meier EstimateLung NeoplasmsMaleMutationProto-Oncogene Proteins p21(ras)Receptor Protein-Tyrosine KinasesRepublic of KoreaSmokingALK protein, humanAlk protein, ratAnaplastic Lymphoma KinaseEGFR protein, humanErbB ReceptorsKRAS protein, humanProto-Oncogene Proteins p21(ras)Receptor Protein-Tyrosine KinasesEpidermal growth factor receptorKRASNever-smokerNon-small cell lung carcinomaPrognosis

Identifiers

PMID28179026
PMCPMC5299770

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Registered trials

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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.