NSCLC Burden of Illness Study

Inclusion Criteria:

Patient medical records will be screened using the following criteria:

* Patients must be aged 18 years or older at the time of first presentation with clinical stage IB-IIIA NSCLC.
* Patients must have complete resection of pathologic stage IB-IIIA NSCLC at least 1 calendar month prior to the date of screening, according to the current classification recommended by the International Association for the Study of Lung Cancer (2009). The investigator/study site must have been the main care provider for the patient during the period of treatment or management of the patient's NSCLC.

Exclusion Criteria:

* Patients who underwent wedge resection.
* Patients whose resection was less than 1 calendar month before the date of screening. Patients who received adjuvant systemic treatment within a clinical trial if the type of adjuvant treatment is either unknown or is not recommended by international clinical guidelines \[European Society for Medical Oncology (ESMO), National Comprehensive Cancer Network (NCCN)\].
* Patients who are lost to follow-up:

  * Living patients who are no longer under the care of the site or can no longer be contacted.
  * Deceased patients who were transferred to another NSCLC treatment centre before death.

Patients with concomitant malignancies who received treatment for other cancers at any time during their treatment or follow-up for NSCLC.