title: Impact of STN-DBS on life and health satisfaction in patients with Parkinson's disease.
abstract: OBJECTIVE
  Advanced Parkinson's disease (PD) is associated with various motor and non-motor symptoms which adversely impact health-related quality of life (HRQoL). Subthalamic nucleus (STN) deep brain stimulation (DBS) has been reported to improve some dimensions of HRQoL in appropriately selected candidates. Prior studies of HRQoL following DBS have used instruments comprising a predetermined list of questions which assess issues that are generally relevant in PD, but that may not be of equal or consistent importance to all individuals. In this study, we evaluate the effect of STN DBS on quality of life using the QLS(M), a modular questionnaire in which satisfaction scores for each item are weighted in light of patient-rated importance.
  
  
  METHODS
  We prospectively analysed QLS(M) scores in 21 patients with PD (11 men, mean age 61.5+/-8.6 years) before STN DBS surgery and at a mean 7.4+/-1.5, and again at a mean 16.6+/-6.8 months postoperatively.
  
  
  RESULTS
  Following STN DBS, patients experienced an improvement in HRQoL as measured by various items of the movement disorder and health modules of the QLS(M). Specifically, QLS(M) items pertaining to energy level/enjoyment of life, independence from help, controllability/fluidity of movement and steadiness when standing and walking showed significant improvements, although items concerning general life issues (eg, occupational function, interpersonal relationships, leisure activities) did not improve.
  
  
  CONCLUSIONS
  Following STN DBS, symptomatic and functional improvements translate into higher HRQoL, with high satisfaction in domains related to movement disorders and general health.
authors.affiliation: Parkinson Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, 6550 Fannin, Suite 1801, Houston, TX 77030, USA. josephj@bcm.tmc.edu
authors.forename: Joseph
authors.initials: J
authors.lastname: Ferrara
authors.forename: Alan
authors.initials: A
authors.lastname: Diamond
authors.forename: Christine
authors.initials: C
authors.lastname: Hunter
authors.forename: Anthony
authors.initials: A
authors.lastname: Davidson
authors.forename: Michael
authors.initials: M
authors.lastname: Almaguer
authors.forename: Joseph
authors.initials: J
authors.lastname: Jankovic
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology; D000368:Aged; D046690:Deep Brain Stimulation / Q000523:psychology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D010300:Parkinson Disease / Q000503:physiopathology / Q000523:psychology / Q000628:therapy*; D017060:Patient Satisfaction; D011788:Quality of Life / Q000523:psychology*; D020531:Subthalamic Nucleus / Q000503:physiopathology; D011795:Surveys and Questionnaires