title: "Real world" treatment of metastatic renal cell carcinoma in a joint community-academic cohort: progression-free survival over three lines of therapy.
abstract: BACKGROUND
  New targeted therapeutics approved for metastatic renal cell carcinoma (mRCC) offer multiple options in each line of therapy; however, there are few prospective data beyond the first-line settings, and overall comparative effectiveness data are limited. In the targeted therapy era, progression-free survival (PFS) has been the most common regulatory end point for demonstrating the benefit of new therapies.
  
  
  METHODS
  Drawing on a joint community-academic retrospective mRCC registry, we analyzed all patients who had undergone at least 1 line of systemic therapy (N = 325) for PFS. Patients were grouped according to treatment choice (sorafenib, sunitinib, temsirolimus, everolimus, and "other") for up to 3 lines of therapy. PFS by treatment choice and line of therapy was evaluated using Kaplan-Meier and Cox regression analyses.
  
  
  RESULTS
  PFS was longest in patients treated with sunitinib in the first and second lines of therapy. First-line PFS for sorafenib, sunitinib, temsirolimus, everolimus, and "other" was 6.9, 8.9, 4.2, not analyzed (too few patients), and 10.8 months, respectively. Second-line PFS was 4.6, 7.0, 3.2, 3.8, and 4.1 months, respectively. Third-line PFS was 4.5, 4.6, 9.9, 4.2, and 2.9, months, respectively. The risk of progression in patients treated with temsirolimus was about twice that of patients treated with sunitinib in the first and second lines of therapy.
  
  
  CONCLUSIONS
  Patients treated with sunitinib had the longest PFS in the first and second lines of therapy. PFS from practice-based data appear consistent with trial-based expectations; however, practice variation was still evident.
authors.affiliation: Division of Medical Oncology, Duke University Medical Center, Durham, NC.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Harrison
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: George
authors.forename: Mark S
authors.initials: MS
authors.lastname: Walker
authors.forename: Connie
authors.initials: C
authors.lastname: Chen
authors.forename: Beata
authors.initials: B
authors.lastname: Korytowsky
authors.forename: Donald T
authors.initials: DT
authors.lastname: Kirkendall
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Stepanski
authors.forename: Amy P
authors.initials: AP
authors.lastname: Abernethy
mesh_terms: D002292:Carcinoma, Renal Cell / Q000188:drug therapy*; D015331:Cohort Studies; D018572:Disease-Free Survival; D000068338:Everolimus; D005260:Female; D006801:Humans; D007211:Indoles / Q000627:therapeutic use; D007680:Kidney Neoplasms / Q000188:drug therapy*; D008297:Male; D008875:Middle Aged; D009536:Niacinamide / Q000031:analogs & derivatives / Q000627:therapeutic use; D010671:Phenylurea Compounds / Q000627:therapeutic use; D011758:Pyrroles / Q000627:therapeutic use; D012189:Retrospective Studies; D020123:Sirolimus / Q000031:analogs & derivatives / Q000627:therapeutic use; D000077157:Sorafenib; D000077210:Sunitinib; D016896:Treatment Outcome
chemical_list: D007211:Indoles; D010671:Phenylurea Compounds; D011758:Pyrroles; D009536:Niacinamide; C401859:temsirolimus; D000068338:Everolimus; D000077157:Sorafenib; D000077210:Sunitinib; D020123:Sirolimus
keywords: Metastasis; Outcomes; Progression-free survival; Renal cell cancer; Targeted cancer treatments