title: [Variability in resource utilization in primary care].
abstract: OBJECTIVE
  To measure variability in the use of primary care resources and identify factors that explain the differences.
  
  
  METHODS
  An ecological observation study.
  
  
  METHODS
  Primary care.
  
  
  METHODS
  The 1996 index of frequency of attendance was chosen as the indicator of primary care resource use throughout the territory managed by INSALUD.
  
  
  METHODS
  The analysis was conducted on a provincial basis, using the statistical technique of multiple linear regression. The index of frequency of attendance was chosen as dependent variable; and demographic, social and economic, mortality, organisation, and offer and accessibility indicators were chosen as explanatory or independent variables.
  
  
  RESULTS
  There was wide variability in frequency of attendance in the areas managed by INSALUD during 1996, with a variation coefficient of 20.5%. The simple linear regression analysis showed that the population's income explained 55% of variability. Income, the number of doctors per 1,000 inhabitants and the percentage of children under 3 explained 70% of the variability of frequency of attendance at primary care.
  
  
  CONCLUSIONS
  There are differences between provinces in primary care health resource use. Attendance for primary care consultation in INSALUD is more frequent in provinces with a low social and economic level, more doctors per 1000 inhabitants and more children under 3.
authors: Subdirección General de Planificación e Información Sanitaria, INSALUD, Madrid.
authors: B
authors: B
authors: Rodríguez Ortiz de Salazar
authors: M J
authors: MJ
authors: Martín Galilea
mesh_terms: D000367:Age Factors; D000368:Aged; D002675:Child, Preschool; D003627:Data Interpretation, Statistical; D006295:Health Resources / Q000706:statistics & numerical data*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D016014:Linear Models; D008962:Models, Theoretical; D010820:Physicians / Q000600:supply & distribution; D011320:Primary Health Care; D012959:Socioeconomic Factors; D013030:Spain