HOME    About this site    mypage    Japanese    library    university    Feedback

University of the Ryukyus Repository >
Faculty of Medicine >
Doctoral Dissertation (Graduate School of Medicine) >

 
Title :Risk factors for progressive sarcopenia 6 months after complete resection of lung cancer : What can thoracic surgeons do against sarcopenia?
Authors :Nagata, Masashi
Authors alternative :永田, 仁
Issue Date :20-Dec-2019
Abstract :Background: Our previous report described how postoperative progression of sarcopenia predicted longterm prognosis after complete resection of non-small cell lung cancer (NSCLC) in heavy smokers. However, there are currently no effective means to treat progressive sarcopenia. In this study, we aimed to confirm our previous findings in a larger population and to identify factors associated with postoperative progression of sarcopenia to propose possible preventative measures.Methods: This retrospective study analyzed the data of 1,095 patients who underwent curative lobar resection for NSCLC at Kanagawa Cancer Center. We divided patients into four groups according to sex and Brinkman index (BI) above or below 600. Six-month postoperative changes in the skeletal muscle index (SMI) were calculated and associations between clinicopathological factors including changes in SMI and mortality from postoperative 6 months were examined. Only in groups in which postoperative depletion of SMI was shown to be associated with the prognosis, we identified clinicopathological factors associated with depletive SMI.Results: The overall survival rates of 1,095 patients were 89.8% and 82.5% at 3 and 5 years, respectively. The median 6-month change in SMI was –3.4% (range, −22.3% to +17.9%). Multivariate analysis revealed that poor prognosis was independently predicted by a large reduction in the SMI (cut-off value: −10%) in males with a BI ≥600. In 391 heavy-smoking males, factors associated with a postoperative change in SMI ≤−10% were history of other cancers (including gastric cancer) low forced expiratory volume in one second (FEV 1.0, cut-off value: 1,870 mL), and prolonged operation time (cut-off value: 200 minutes).Conclusions: Perioperative measures to prevent postoperative sarcopenia are appropriate for heavy smokers. We obtained some clues regarding countermeasures, one of which may be avoiding long-time operation. Further studies including clinical trials to assess perioperative anti-sarcopenia treatments, are needed.
URL :http://dx.doi.org/10.21037/jtd.2020.01.44
Type Local :学位論文
ISSN :2072-1439
2077-6624
Publisher :University of the Ryukyus
URI :http://hdl.handle.net/20.500.12000/46625
Grant id :18001医研第508号
Date of granted :2020-03-24
Degree name :博士(医学)
Grantor :琉球大学
Citation :Journal of Thoracic Disease Vol.12 no.3 p.308 -318
Appears in Collections:Doctoral Dissertation (Graduate School of Medicine)

Files in This Item:

File Description SizeFormat
iken508abstract.pdfAbstract_論文要旨474KbAdobe PDFView/Open
iken508review.pdfReview_審査要旨640KbAdobe PDFView/Open
iken508text.pdfText_全文511KbAdobe PDFView/Open