title: [Medical insurance coverage in Mexico].
abstract: OBJECTIVE
  To present estimates of health insurance coverage in Mexico and discuss the differences among some sources of information.
  
  
  METHODS
  Based on a national survey performed in 2002, the percentage of insurance coverage was estimated by state, rural condition, and expenditure level.
  
  
  RESULTS
  The percentage of the population without medical insurance is 59.9%. The main insurance institution is the Mexican Institute for Social Security (Instituto Mexicano del Seguro Social, IMSS), with a coverage of 29.5%. Private insurance agencies cover 1.5% of the total population. There are huge differences in insurance coverage by state, expenditure level and social exclusion level.
  
  
  CONCLUSIONS
  Data on insurance coverage provided by Mexico's main social security institution differ from that obtained through population-based studies. Some of these differences may be due to probabilistic reasons and others to macroeconomic changes. However, these reasons had not been sufficiently explored. In depth studies are needed in order to explain the observed differences.
authors.affiliation: Dirección General de Evaluación del Desempeño, Secretaría de Salud, México, DF, Mexico. epuentes@salud.gob.mx
authors.forename: Esteban
authors.initials: E
authors.lastname: Puentes-Rosas
authors.forename: Sergio
authors.initials: S
authors.lastname: Sesma
authors.forename: Octavio
authors.initials: O
authors.lastname: Gómez-Dantés
mesh_terms: D003625:Data Collection; D006801:Humans; D019458:Insurance Coverage / Q000706:statistics & numerical data*; D007348:Insurance, Health / Q000706:statistics & numerical data*; D017057:Medically Uninsured / Q000706:statistics & numerical data*; D008800:Mexico; D012424:Rural Population; D012943:Social Security / Q000706:statistics & numerical data; D011795:Surveys and Questionnaires; D014505:Urban Population