title: [Inter-observer agreement on the Eaton-Littler classification of trapeziometacarpal joint osteoarthritis].
abstract: OBJECTIVE
  To study the concordance of the radiographic classification of Eaton-Littler for the diagnosis of basal thumb joint osteoarthritis (BTJO). The null hypothesis was that the concordance was due to chance and the alternative was that the concordance was not due to chance.
  
  
  METHODS
  We have observed the x-rays of 46 patients with symptoms and clinical signs of BTJO. They were independently classified by five physicians: three experts in upper extremity, one in radiology and a fourth year resident of Orthopedics. We studied the concordance in the observations through the global Kappa.
  
  
  CONCLUSIONS
  The diagnosis of BTJO is based primarily on clinical exploration, radiology is a complementary method of confirmation. The classification of Eaton-Littler proposes 4 stages of the disease, with a therapeutic involvement.
  
  
  CONCLUSIONS
  The concordance of the radiographic classification of Eaton-Littler is moderate.
authors.affiliation: Departamento de Cirugía Ortopédica y Traumatología, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España.
authors.forename: M
authors.initials: M
authors.lastname: Hirschfeld
authors.affiliation: Departamento de Cirugía Ortopédica y Traumatología, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España. Electronic address: adgano@hotmail.com.
authors.forename: A
authors.initials: A
authors.lastname: Galán
authors.affiliation: Departamento de Cirugía Ortopédica y Traumatología, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España.
authors.forename: J
authors.initials: J
authors.lastname: Arenas
authors.affiliation: Departamento de Cirugía Ortopédica y Traumatología, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España.
authors.forename: B
authors.initials: B
authors.lastname: Del Águila
authors.affiliation: Departamento de Investigación, Estadística y Epidemiología, Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España.
authors.forename: N
authors.initials: N
authors.lastname: Benitez-Parejo
authors.affiliation: Departamento de Radiodiagnóstico, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España.
authors.forename: J A
authors.initials: JA
authors.lastname: Costa
authors.affiliation: Departamento de Cirugía Ortopédica y Traumatología, Hospital Universitario Costa del Sol, Universidad de Málaga, Marbella, Málaga, España.
authors.forename: E
authors.initials: E
authors.lastname: Guerado
mesh_terms: D052737:Carpometacarpal Joints / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D015588:Observer Variation; D010003:Osteoarthritis / Q000145:classification* / Q000000981:diagnostic imaging*; D011859:Radiography; D051222:Trapezium Bone
keywords: Basal thumb osteoarthritis; Concordancia interobservador; Diagnosis; Diagnóstico; Inter-observer agreement; Rizartrosis