title: Oral health-related quality of life after prosthetic rehabilitation: a longitudinal study with the OHIP questionnaire.
abstract: BACKGROUND
  Aspects of oral health related quality of life (OHRQoL) attracted an increased attention recently.
  
  
  OBJECTIVE
  The aim of the study was to assess self-reported oral health related quality of life (OHRQoL) among patients requiring prosthetic rehabilitation and to determine the rate of improvement 1 month and 6-12 months after therapy. In addition, effect of age, gender, oral health indicators and denture types before treatment were assessed on OHRQoL as evaluated and reported by the patients.
  
  
  METHODS
  Hungarian version of OHIP-49 (OHIP-49-H) questionnaire was completed before oral rehabilitation (T0-phase) by 389 patients undergoing prosthetic replacement. After 1 month (T1-phase) and 6-12 months (T2-phase) recall periods 235 and 92 patients completed the questionnaire. The median interquartile range (IQR) values of the total OHIP-49-H score were calculated for T0-, T1- and T2-phases. Reliability of the questionnaire was checked by Cronbach's statistics. Age, gender, oral health indicators and denture types of patients before and after treatment were recorded and treatment-associated changes in OHRQoL were evaluated.
  
  
  RESULTS
  The study demonstrated the excellent reliability and internal consistency of OHIP-49-H by a high and narrow range of Cronbach's alpha value (0.81-0.93). A median OHIP-49-H score of 52; IQR = 25-83 demonstrated a poor OHRQoL on first admission. Decreasing median total OHIP-49-H scores 1 month (24; IQR = 9-51; p < 0.001) and 6-12 months (20; IQR = 7-37; p = 0,055) after therapy indicated an improvement of OHRQoL. Patients' age and CPI value assessed before treatment proved to be significant factors of OHRQoL.
  
  
  CONCLUSIONS
  Here we presented representative data about self-assessed OHRQoL of patients requiring prosthetic treatment from Hungary using OHIP-49-H questionnaire. The results demonstrated that the restoration of oral health was associated with an improvement in patients' OHRQoL. According to the demographical and T0 phase clinical status, the treatment was more effective in the respect of OHIP-49-H score improvement among females (than among males), among younger (than among more aged), and among patients with more serious CPI assessed at T0. The type of prosthetic interventions did not exert a significant effect on total OHIP-49-H score, suggesting that the improvement in OHRQoL is independent from the type of denture applied.
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Debrecen, 98 Nagyerdei Krt, Debrecen, H-4032, Hungary. jagnes06@gmail.coml.
authors.forename: Ágnes
authors.initials: Á
authors.lastname: Jenei
authors.affiliation: Faculty of Public Health, University of Debrecen, 26 Kassai Street, Debrecen, H-4028, Hungary. sandor.janos@sph.unideb.hu.
authors.forename: János
authors.initials: J
authors.lastname: Sándor
authors.affiliation: Department of Prosthetic Dentistry, Faculty of Dentistry, University of Debrecen, 98 Nagyerdei Krt, Debrecen, H-4032, Hungary. hegedus.csaba.prof@dental.unideb.hu.
authors.forename: Csaba
authors.initials: C
authors.lastname: Hegedűs
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Debrecen, 98 Nagyerdei Krt, Debrecen, H-4032, Hungary. bagyi.kinga@dental.unideb.hu.
authors.forename: Kinga
authors.initials: K
authors.lastname: Bágyi
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Debrecen, 98 Nagyerdei Krt, Debrecen, H-4032, Hungary. laszlo.nagy@dental.unideb.hu.
authors.forename: László
authors.initials: L
authors.lastname: Nagy
authors.affiliation: Division of Pediatric Hemato-oncology, Department of Pediatrics, University of Debrecen, 98 Nagyerdei Krt, Debrecen, H-4032, Hungary. kisscs@med.unideb.hu.
authors.forename: Csongor
authors.initials: C
authors.lastname: Kiss
authors.affiliation: Division of Prosthodontics, Department of Dentistry, Oral and Maxillofacial Surgery, University of Pécs Medical School, 5 Dischka Győző Str, Pécs, H-7621, Hungary. szabo.gyula@pte.hu.
authors.forename: Gyula
authors.initials: G
authors.lastname: Szabó
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, University of Debrecen, 98 Nagyerdei Krt, Debrecen, H-4032, Hungary. marton.ildiko@dental.unideb.hu.
authors.forename: Ildikó J
authors.initials: IJ
authors.lastname: Márton
mesh_terms: D000328:Adult; D000368:Aged; D003778:Dentures / Q000523:psychology* / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D006814:Hungary / Q000453:epidemiology; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009909:Oral Health / Q000706:statistics & numerical data*; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D057566:Self Report; D011795:Surveys and Questionnaires