title: Comparison of clinical outcome of stage I non-small cell lung cancer treated surgically or with stereotactic radiotherapy: results from propensity score analysis.
abstract: OBJECTIVE
  Guideline-specified curative therapies for a clinical stage I non-small cell lung cancer (NSCLC) are either lobectomy or Stereotactic Ablative Radiotherapy (SABR). As outcomes of prospective randomized clinical trials comparing these modalities are unavailable, we performed a propensity-score matched analysis to create two similar groups in order to compare clinical outcomes.
  
  
  METHODS
  We selected 577 patients, 96 VATS or open lobectomy were treated at Erasmus University Medical Center Rotterdam and 481 SABR patients were treated at VU University Medical Center Amsterdam with clinical stage I NSCLC.
  
  
  RESULTS
  Matching of patients according to propensity score resulted in a cohort that consisted of 73 patients in the surgery group and of 73 patients in the SABR group. Median follow-up in the surgery and SABR group was 49 months and 28 months, respectively. Overall survival of patients who underwent surgery was 95% and 80% at 12 and 60 months, respectively. For the SABR group this was 94% at 12 months and 53% at 60 months. No statistical significant difference (p=0.089) in survival was found between these groups.
  
  
  CONCLUSIONS
  In this study we found no significant differences in overall survival in propensity matched patients diagnosed with stage I NSCLC treated either surgically or with SABR. After 3 years there seems to be a trend toward improved survival in patients who were treated surgically.
authors.affiliation: Department of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands. Electronic address: s.mokhles@erasmusmc.nl.
authors.forename: Sahar
authors.initials: S
authors.lastname: Mokhles
authors.affiliation: Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Naomi
authors.initials: N
authors.lastname: Verstegen
authors.affiliation: Department of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Alex P W M
authors.initials: AP
authors.lastname: Maat
authors.affiliation: Department of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Özcan
authors.initials: Ö
authors.lastname: Birim
authors.affiliation: Department of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Ad J J C
authors.initials: AJ
authors.lastname: Bogers
authors.affiliation: Department of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: M Mostafa
authors.initials: MM
authors.lastname: Mokhles
authors.affiliation: Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Frank J
authors.initials: FJ
authors.lastname: Lagerwaard
authors.affiliation: Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Suresh
authors.initials: S
authors.lastname: Senan
authors.affiliation: Department of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands.
authors.forename: Johanna J M
authors.initials: JJ
authors.lastname: Takkenberg
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002289:Carcinoma, Non-Small-Cell Lung / Q000401:mortality / Q000473:pathology* / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011013:Pneumonectomy / Q000009:adverse effects; D057216:Propensity Score; D016634:Radiosurgery / Q000009:adverse effects; D016896:Treatment Outcome
keywords: Non-small cell lung carcinoma; Radiation oncology; Survival; Thoracic surgery