title: Reliability and validity of the patient disability-oriented diagnostic nomenclature system for prosthetic dentistry.
abstract: OBJECTIVE
  The Japan Prosthodontic Society (JPS) has proposed a new diagnostic nomenclature system (DNS), based on pathogenesis and etiology, to facilitate and improve prosthodontic treatment. This system specifies patient disability and the causative factor (i.e. "B (disability) caused by A (causative factor)"). The purpose of this study was to examine the reliability and validity of this DNS.
  
  
  METHODS
  The JPS Clinical Guideline Committee assessed mock patient charts and formulated disease names using the new DNS. Fifty validators, comprising prosthodontic specialists and dental residents, made diagnoses using the same patient charts. Reliability was evaluated as the consistency of the disease names among the validators, and validity was evaluated using the concordance rate of the disease names with the reference disease names.
  
  
  RESULTS
  Krippendorff's α was 0.378 among all validators, 0.370 among prosthodontic specialists, and 0.401 among dental hospital residents. Krippendorff's α for 10 validators (3 specialists and 7 residents) with higher concordance rates was 0.524. Two validators (1 specialist and 1 resident) with the highest concordance rates had a Krippendorff's α of 0.648. Common disease names had higher concordance rates, while uncommon disease names showed lower concordance rates. These rates did not show correlation with clinical experience of the validator or time taken to devise the disease name.
  
  
  CONCLUSIONS
  High reliability was not found among all validators; however, validators with higher concordance rates showed better reliability. Furthermore, common disease names had higher concordance rates. These findings indicate that the new DNS for prosthodontic dentistry exhibits clinically acceptable reliability and validity.
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Japan. Electronic address: matsuka@tokushima-u.ac.jp.
authors: Yoshizo
authors: Y
authors: Matsuka
authors: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Japan.
authors: Yoshiyuki
authors: Y
authors: Hagiwara
authors: Department of Prosthodontic Dentistry for Function of TMJ and Occlusion, Kanagawa Dental University, Japan.
authors: Katsushi
authors: K
authors: Tamaki
authors: Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Japan.
authors: Hisahiro
authors: H
authors: Takeuchi
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Division of Fixed Prosthodontics, Meikai University School of Dentistry, Japan.
authors: Masanori
authors: M
authors: Fujisawa
authors: Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Japan.
authors: Takahiro
authors: T
authors: Ono
authors: Section of Implant and Rehabilitative Dentistry, Faculty of Dental Science, Kyushu University, Japan.
authors: Yoshihiro
authors: Y
authors: Tsukiyama
authors: Department of Oral & Maxillofacial Prosthodontics, Graduate School of Biomedical Sciences, Tokushima University, Japan.
authors: Kan
authors: K
authors: Nagao
authors: Department of Advanced Prosthodontics, Institute of Biomedical & Health Sciences, Hiroshima University, Japan.
authors: Kazuhiro
authors: K
authors: Tsuga
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Department of Occlusion and Removable Prosthodontics, Health Sciences University of Hokkaido School of Dentistry, Japan.
authors: Hideki
authors: H
authors: Aita
authors: Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Japan.
authors: Hisatomo
authors: H
authors: Kondo
authors: Removable Partial Denture Prosthodontics, Tokyo Medical and Dental University, Japan.
authors: Kenji
authors: K
authors: Fueki
authors: Department of Prosthodontics, Showa University School of Dentistry, Japan.
authors: Hiroaki
authors: H
authors: Tsukasaki
authors: Department of Stomatognathic Function and Occlusal Reconstruction, Graduate School of Biomedical Sciences, Tokushima University, Japan.
authors: Keisuke
authors: K
authors: Nishigawa
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Department of Removable Prosthodontics, School of Dentistry, Aichi Gakuin University, Japan.
authors: Shogo
authors: S
authors: Ozawa
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Section of Implant and Rehabilitative Dentistry, Faculty of Dental Science, Kyushu University, Japan.
authors: Rika
authors: R
authors: Kuwatsuru
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan.
authors: Hajime
authors: H
authors: Minakuchi
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Japan.
authors: Toshimitsu
authors: T
authors: Iinuma
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Section of Fixed Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Japan.
authors: Takashi
authors: T
authors: Matsuura
authors: School of Dentistry, Iwate Medical University, Japan.
authors: Kanji
authors: K
authors: Ishibashi
authors: Department of Partial and Complete Denture, The Nippon Dental University School of Life Dentistry, Japan.
authors: Shigehisa
authors: S
authors: Fujii
authors: Health Sciences University of Hokkaido, Japan.
authors: Toshihiro
authors: T
authors: Hirai
authors: Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Japan.
authors: Keiichi
authors: K
authors: Sasaki
authors: Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan.
authors: Hirofumi
authors: H
authors: Yatani
authors: Osaka Dental University, Japan.
authors: Yoshimasa
authors: Y
authors: Igarashi
authors: Department of Geriatric Dentistry, Showa University School of Dentistry, Japan.
authors: Yuji
authors: Y
authors: Sato
authors: Department of Oral & Maxillofacial Prosthodontics, Graduate School of Biomedical Sciences, Tokushima University, Japan.
authors: Tetsuo
authors: T
authors: Ichikawa
authors: Department of Prosthetic Dentistry, Ohu University School of Dentistry, Japan.
authors: Tetsuo
authors: T
authors: Yamamori
authors: Department of Oral Rehabilitation and Regenerative Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan.
authors: Takuo
authors: T
authors: Kuboki
authors: Department of Prosthodontics, Showa University School of Dentistry, Japan.
authors: Kazuyoshi
authors: K
authors: Baba
authors: Section of Implant and Rehabilitative Dentistry, Faculty of Dental Science, Kyushu University, Japan.
authors: Kiyoshi
authors: K
authors: Koyano
authors: Clinical Guideline Committee, Japan Prosthodontic Society, Japan; Section of Fixed Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Japan.
authors: Hironobu
authors: H
authors: Sato
authors: Department of Fixed Prosthodontics, Nihon University School of Dentistry, Japan.
authors: Hideo
authors: H
authors: Matsumura
mesh_terms: D003945:Diagnosis, Oral / Q000379:methods*; D006801:Humans; D007564:Japan; D011476:Prosthodontics / Q000379:methods*; D015203:Reproducibility of Results
keywords: Diagnostic nomenclature system; Prosthodontic treatment; Reliability; Validity