Sample Selection
The medical records of forty-four children, surgically treated for CLM between 2006 and 2016 at the Marmara University School of Medicine, Division of Pediatric Surgery, Turkey, were extracted from medical archives. 28 of these patients could not be reached because of having incomplete medical information, changing adresses or phone numbers.
Sixteen patients, who previously had lobectomies with the diagnosis of CLM and 30 age-matched healthy children, as a control group were included to the study. In the both study groups’ participants having any chronic systemic and respiratory disease and unable to perform spirometry were not included to the study.
The study was approved by the Research Ethics Committee of Marmara University (approval number: 09.2017.614). Written and verbal consents were obtained from the parents and also over 12 years of age participants’ themselves.