title: Measuring patient-based outcomes: is treatment satisfaction associated with oral health-related quality of life?
abstract: OBJECTIVE
  To evaluate the level of association between patients' denture satisfaction and oral health-related quality of life (OHRQoL) in edentate patients, and to identify the determinants of satisfaction that best predict OHRQoL. The effects of time and treatment type were also assessed.
  
  
  METHODS
  Data from 255 edentate elders who participated in a randomised clinical trial were used. OHRQoL ratings were gathered using the Oral Health Impact Profile (OHIP-20) questionnaire. The McGill Denture Satisfaction Instrument was used to assess satisfaction with treatment (mandibular conventional denture or implant overdenture). Outcomes were measured prior to treatment, then 6 and 12 months after delivery of the new prostheses. Simple linear and multiple linear regression analyses were performed to statistically analyse the relationship.
  
  
  RESULTS
  When the combined effect of all factors was assessed, only two variables of denture satisfaction ratings were significantly associated with OHRQoL: chewing ability (P=.005) and oral condition (P=.002). These two variables explained 46.4% of the variance in the OHIP change scores. This association varied with time, but the variables of importance remained the same. Type of treatment, gender, age and other socio-demographic variables were not significantly associated with improvement in OHRQoL once their effects were combined with denture satisfaction ratings.
  
  
  CONCLUSIONS
  Within the limitations of this study, a highly positive association exists between oral health-related quality of life and denture satisfaction. Chewing ability and oral condition are the determinants of denture satisfaction best associated with OHRQoL, predicting 46.4% of its improvement following a treatment.
authors.affiliation: Département de Dentisterie de Restauration, Faculté de Médecine Dentaire, Université de Montréal, Montréal, Canada.
authors.forename: Pierre-Luc
authors.initials: PL
authors.lastname: Michaud
authors.forename: Pierre
authors.initials: P
authors.lastname: de Grandmont
authors.forename: Jocelyne S
authors.initials: JS
authors.lastname: Feine
authors.forename: Elham
authors.initials: E
authors.lastname: Emami
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001294:Attitude to Health; D019094:Dental Prosthesis, Implant-Supported / Q000523:psychology; D003779:Denture Design; D003781:Denture Retention / Q000523:psychology; D003826:Denture, Complete, Lower / Q000523:psychology*; D003828:Denture, Overlay / Q000523:psychology; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007802:Language; D008297:Male; D008409:Mastication / Q000502:physiology; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000523:psychology / Q000534:rehabilitation; D009909:Oral Health; D009910:Oral Hygiene; D017060:Patient Satisfaction; D011788:Quality of Life; D012737:Sex Factors; D013060:Speech / Q000502:physiology; D013997:Time Factors; D016896:Treatment Outcome