title: [Temporomandibular disorders: Evaluation of the usefulness of a self-test questionnaire].
abstract: BACKGROUND
  A self-test questionnaire has been provided in the internet and in some dental offices for some time now. By using this questionnaire, interested individuals may assess whether they have a temporomandibular disorder (TMD) which might require therapy. It is the aim of this article to examine whether the 11 questions are apt to reliably identify patients with suspected TMDs within a given population.
  
  
  METHODS
  Each question has been examined for its relevance by resorting to the current literature. Accordingly, the inclusion of each question into the self-test questionnaire has been rated as suitable or unsuitable.
  
  
  RESULTS
  Only 2½ of the 11 questions are useful to detect individuals with as-yet undiagnosed TMDs.
  
  
  CONCLUSIONS
  Due to its missing content validity, the questionnaire cannot be recommended.
authors.affiliation: Klinik für Rekonstruktive Zahnmedizin und Myoarthropathien, Universitätskliniken für Zahnmedizin, Basel, Schweiz. jens.tuerp@unibas.ch
authors.forename: Jens C
authors.initials: JC
authors.lastname: Türp
authors.forename: Hans Jürgen
authors.initials: HJ
authors.lastname: Schindler
authors.forename: Gerd
authors.initials: G
authors.lastname: Antes
mesh_terms: D003937:Diagnosis, Differential; D059026:Diagnostic Self Evaluation; D006801:Humans; D020407:Internet; D011594:Psychometrics / Q000706:statistics & numerical data; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D013706:Temporomandibular Joint Dysfunction Syndrome / Q000175:diagnosis* / Q000209:etiology
keywords: Fragebogen; Inhaltsvalidität; Internet; Kraniomandibuläre Dysfunktionen; Temporomandibular disorders; content validity; internet; overdiagnosis; questionnaire; Überdiagnostik