title: [Study of the demand for laboratory tests in primary care].
abstract: OBJECTIVE
  To study the demand for laboratory test from a sample of Primary Care doctors.
  
  
  METHODS
  A crossover observational study.
  
  
  METHODS
  Primary care medical clinics in Spain and Andorra.
  
  
  METHODS
  Volunteer doctor with primary care practices.
  
  
  METHODS
  The study was based on: a) a questionnaire to the doctors taking part, on their clinical consultations, b) recording of the age and gender of patients seen during four consecutive weeks, and c) the logging of the laboratory tests requested during these four weeks.
  
  
  RESULTS
  82 doctors took part. They had 37,383 clinical consultations, asking for 1,965 analytical studies with 7,248 tests; i.e., they generated 5.25 requests for analysis per hundred consultations. The doctors who requested most analyses had less consultations/day and less consultations/inhabitants/year. When the distance to the laboratory increased, the analyses per consultation lessened and the analyses per inhabitant went up. The most common reason for requesting analysis was the follow-up of an already-known pathology.
  
  
  CONCLUSIONS
  A request for analysis is made in 5.25% of primary care consultations. The most common reason is to follow up an already-known pathology.
authors.affiliation: Red Española de Atención Primaria, Madrid.
authors.forename: M A
authors.initials: MA
authors.lastname: Ripoll Lozano
authors.forename: C
authors.initials: C
authors.lastname: Alda
authors.forename: M
authors.initials: M
authors.lastname: Pérez Fernández
authors.forename: J
authors.initials: J
authors.lastname: Gérvas
mesh_terms: D003955:Diagnostic Tests, Routine / Q000706:statistics & numerical data*; D005194:Family Practice / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008297:Male; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D013030:Spain
vernacular_title: Estudio de la demanda de pruebas de laboratorio en antención primaria.