title: The South American Glabellar Experience Study (SAGE): a multicenter retrospective analysis of real-world treatment patterns following the introduction of incobotulinumtoxinA in Argentina.
abstract: BACKGROUND
  IncobotulinumtoxinA was approved in Argentina in 2007 for the treatment of moderate to severe glabellar lines.
  
  
  OBJECTIVE
  The authors evaluate real-world changes in facial aesthetic treatment patterns and patient satisfaction following the introduction of incobotulinumtoxinA in Argentina.
  
  
  METHODS
  This multicenter, retrospective chart review conducted in Argentina included women who had received at least 2 treatment cycles of onabotulinumtoxinA (Allergan, Irvine, California) for glabellar lines (period 1) prior to switching to incobotulinumtoxinA (Merz Pharma, GmbH, Frankfurt, Germany (period 2). Subjects were given the option to continue with incobotulinumtoxinA treatments (captured in period 2) or switch back to onabotulinumtoxinA (documented as period 3). Medical records were reviewed for demographics, dosing, reason for switching between products, treatment satisfaction, and interval between injection cycles.
  
  
  RESULTS
  One hundred ten women were enrolled and collectively received 662 treatment cycles with botulinum toxin. Subjects were switched to incobotulinumtoxinA at unit doses that were numerically and statistically similar to the onabotulinumtoxinA doses they received in period 1. Most subjects (92%) initially switched to incobotulinumtoxinA because of lower cost. Ninety-two subjects (84%) switched back to onabotulinumtoxinA in period 3, most commonly due to insufficient duration of effect with incobotulinumtoxinA (61/92; 66%). Subjects reported satisfaction with treatment in >90% of their onabotulinumtoxinA visits and in 34% of their incobotulinumtoxinA visits. Median interinjection intervals with onabotulinumtoxinA were 180.3 days (period 1) and 176.9 days (period 3) and 144.3 days with incobotulinumtoxinA in period 2.
  
  
  CONCLUSIONS
  In this real-world setting, subjects did not appear to perceive the same facial aesthetic benefits from incobotulinumtoxinA as onabotulinumtoxinA when the products were administered at comparable doses.
authors.affiliation: Dr Banegas, Dr Farache, and Dr Rancati are plastic surgeons in private practice in Buenos Aires, Argentina.
authors.forename: Raúl A
authors.initials: RA
authors.lastname: Banegas
authors.forename: Fernando
authors.initials: F
authors.lastname: Farache
authors.forename: Alberto
authors.initials: A
authors.lastname: Rancati
authors.forename: Myriam
authors.initials: M
authors.lastname: Chain
authors.forename: Conor J
authors.initials: CJ
authors.lastname: Gallagher
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Chapman
authors.forename: Carrie A
authors.initials: CA
authors.lastname: Caulkins
mesh_terms: D000328:Adult; D000368:Aged; D001118:Argentina; D019274:Botulinum Toxins, Type A / Q000008:administration & dosage*; D017277:Drug Approval; D004954:Esthetics; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D009465:Neuromuscular Agents / Q000008:administration & dosage*; D017060:Patient Satisfaction; D012189:Retrospective Studies; D012720:Severity of Illness Index; D015595:Skin Aging / Q000187:drug effects*; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D009465:Neuromuscular Agents; D019274:Botulinum Toxins, Type A; C545476:incobotulinumtoxinA
keywords: botulinum toxin; cosmetic medicine; facial lines; glabellar lines; treatment satisfaction