title: [The Ottawa ankle guidelines: analysis of their validity as clinical decision guidelines in the indication of X-rays for ankle and/or middle-foot injuries].
abstract: OBJECTIVE
  To analyse the validity of the Ottawa ankle guidelines (OAG) as clinical decision guidelines in the indications of X-rays for ankle and/or middle-foot traumas in primary care.
  
  
  METHODS
  Observational, with application of the OAG and prospective measurement of the results.Setting. Hospital casualty.
  
  
  METHODS
  Adults who attended casualty for ankle or middle-foot traumas between 1st June 1999 and 31th March 2000. Criteria for exclusion were: under 18, pregnancy, grave sensory and/or awareness disturbances, multi-trauma or multi-contusion patients, traumas over a week old, skin lesions as side-effects of the trauma, X-ray in other department, high inflammation or oedema hindering palpation of bone protuberances.
  
  
  METHODS
  Application of the OAG and X-ray on all patients, regardless of the result of the OAG. Calculation of sensitivity, negative predictive value, specificity and positive predictive value.
  
  
  RESULTS
  56 of a sample of 494 patients had a fracture (11.34%), 34 in the malleolus area (6.9%) and 22 in the middle-foot area (4.44%). OAG sensitivity was 96.43% (95% CI, 94.8-98). Negative predictive value was 97.22% (95.77-98.67). Specificity was 15.98% (12.75-19.21), and positive predictive value was 12.8% (9.86-15.74).
  
  
  CONCLUSIONS
  The OAG are valid in primary care as guidelines to decide whether to request X-rays for patients with ankle or middle-foot traumas.
authors: Centro de Salud de Tafalla (Navarra), Hospital de Navarra, Pamplona. pgarces@bifap.org
authors: P
authors: P
authors: Garcés
authors: S
authors: S
authors: Gurucharri
authors: C
authors: C
authors: Ibiricu
authors: M
authors: M
authors: Izuel
authors: J
authors: J
authors: Mozo
authors: P
authors: P
authors: Buil
authors: J
authors: J
authors: Díez
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016512:Ankle Injuries / Q000000981:diagnostic imaging*; D005260:Female; D005529:Foot Bones / Q000000981:diagnostic imaging* / Q000293:injuries*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011859:Radiography; D012680:Sensitivity and Specificity; D013030:Spain