title: Hylan G-F 20 has better pain relief and cost-effectiveness than sodium hyaluronate in treating early osteoarthritic knees in Taiwan.
abstract: OBJECTIVE
  Intra-articular injection of hyaluronan (hyaluronic acid; HA) products is available to treat early osteoarthritis (OA) of the knee in Taiwan. We tested whether HA products with different molecular weights have significantly different effects on clinical efficacy and cost-effectiveness.
  
  
  METHODS
  Thirty-seven patients with mild to moderate OA of both knees underwent five weekly intra-articular injections of sodium hyaluronate (Artz) in one knee and three weekly intra-articular injections of chemically cross-linked Hylan G-F 20 (Synvisc) in the other. Visual analog scale (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Lequesne's index, and Hospital for Special Surgery (HSS) knee scores were compared initially and at the last injection, and at 8, 12, 16, 20, and 26 weeks after the first injection.
  
  
  RESULTS
  VAS, WOMAC, WOMAC-A1 (pain when walking on a flat surface) scores before week 16, HSS scores before week 12, and Lequesne's index scores except at week 26 all showed that HA significantly improved the scores time-dependently. In VAS scores, Synvisc showed better improvement before week 20, while this effect appeared at week 12 for the WOMAC-A1 scores. The incremental cost-effectiveness ratio of the Taiwan National Health Insurance Program, of the patient, and both of these was lower for Synvisc, which also reduced the number of additional hospital visits for injections by two.
  
  
  CONCLUSIONS
  Synvisc possesses better symptom-modifying ability and cost-utility in treating early OA of the knee in Taiwan.
authors: Department of Orthopedics, Chung Shan Medical University Hospital, Taichung, Taiwan.
authors: Chi-Wen
authors: CW
authors: Chou
authors: Ko-Huang
authors: KH
authors: Lue
authors: Hong-Shen
authors: HS
authors: Lee
authors: Renn-Chia
authors: RC
authors: Lin
authors: Ko-Hsiu
authors: KH
authors: Lu
mesh_terms: D000368:Aged; D003362:Cost-Benefit Analysis; D005260:Female; D006801:Humans; D006820:Hyaluronic Acid / Q000031:analogs & derivatives* / Q000191:economics / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000188:drug therapy*; D010146:Pain / Q000188:drug therapy*; D017060:Patient Satisfaction; D019057:Quality-Adjusted Life Years
chemical_list: C049816:hylan; D006820:Hyaluronic Acid