This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/pon.5167 This article is protected by copyright. All rights reserved. Papadopoulos Dimitrios (Orcid ID: 0000-0002-5547-6474) Psychological correlates of sleep quality in lung cancer patients under chemotherapy: a single-center cross-sectional study Running title: Sleep quality and psychological symptoms in lung cancer patients Dimitrios Papadopoulos | Maria Kiagia | Andriani Charpidou | Ioannis Gkiozos | Konstantinos Syrigos Oncology Unit, 3 rd Department of Medicine, Medical School, National and Kapodistrian University of Athens, “Sotiria” Regional Chest Diseases Hospital of Athens, Athens, Greece Correspondence Dimitrios Papadopoulos, Oncology Unit, 3 rd Department of Medicine, Medical School, National and Kapodistrian University of Athens, “Sotiria” Regional Chest Diseases Hospital of Athens, 152 Mesogion Avenue, Athens 11527, Greece. Email: d.g.papadopoulos@gmail.com