[Estimation of a geographic accessibility index of different health centers in Mexico].
BACKGROUND
The accessibility to health centers is a limitation to the use of preventive and curative health centers.


OBJECTIVE
To assess geographic accessibility using a parameter that integrates information about the use of preventive services and travelling time from home to the health center.


METHODS
We analyzed target geographical areas of 10 community centers located at the Northeast of Mexico. A survey was conducted to collect information about the utilization of preventive services for detection of diabetes and hypertension within last year and in women, detection of cervical and breast cancer. The time required to travel between the health center and the farthest location point at every neighborhood of each geographic area, using public or private transportation, was calculated. Health service use and transportation time were condensed in a single parameter, called geographic accessibility index. Data was normalized using z scores.


RESULTS
Three geographical areas denominated 7, 8 and 10 had the lowest detection rates of chronic diseases, with values ranging from 45% to 48%. By car, area number 3 had the longest travelling time, corresponding to 14 minutes. The longest travelling times by public transportation were detected in areas 1 and 3, corresponding to 27 and 29 minutes, respectively The geographic accessibility index showed that the least favorable z scores travelling by car corresponded to areas 6 and 10 and, when travelling on public transportation, to areas 8 and 10.


CONCLUSIONS
The geographic accessibility index identified areas that required improvements in accessibility.
Unidad de Investigación Epidemiológica y en Servicios de Salud, Instituto Mexicano del Seguro Social, México. maria.garzae@imss.gob.mx
María Eugenia
ME
Garza-Elizondo
Ana María
AM
Salinas-Martínez
Georgina Mayela
GM
Núñez-Rocha
Enrique
E
Villarreal Ríos
María Guadalupe
MG
Vásquez-Treviño
María Guadalupe
MG
Vásquez-Salazar
D000328:Adult; D001943:Breast Neoplasms / Q000517:prevention & control; D002391:Catchment Area, Health / Q000706:statistics & numerical data*; D003695:Delivery of Health Care / Q000706:statistics & numerical data*; D003920:Diabetes Mellitus / Q000517:prevention & control; D005260:Female; D006297:Health Services Accessibility / Q000706:statistics & numerical data*; D006801:Humans; D006973:Hypertension / Q000517:prevention & control; D008297:Male; D008800:Mexico; D008875:Middle Aged; D014187:Transportation of Patients / Q000379:methods / Q000706:statistics & numerical data*; D002583:Uterine Cervical Neoplasms / Q000517:prevention & control; D055815:Young Adult