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BioMed Research International
Volume 2017 (2017), Article ID 6069374, 6 pages
Research Article

A Frailty Index from Next-of-Kin Data: A Cross-Sectional Analysis from the Mexican Health and Aging Study

1Research Department, Instituto Nacional de Geriatría, Mexico City, Mexico
2Gérontopôle, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
3Université de Toulouse III Paul Sabatier, Toulouse, France
4Hospital Infantil de México Federico Gómez, Mexico City, Mexico

Correspondence should be addressed to Carmen García-Peña

Received 5 February 2017; Revised 21 March 2017; Accepted 30 March 2017; Published 19 April 2017

Academic Editor: Claudio De Lucia

Copyright © 2017 Mario Ulises Pérez-Zepeda et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. To construct a frailty index from next-of-kin information of the last year of life of community-dwelling 50 years old or older adults and test its association with health services utilization. Methods. Cross-sectional analysis from next-of-kin data available from the last wave of the Mexican Health and Aging Study (MHAS). Measurements. Along with descriptive statistics, the frailty index (FI) was tested in regression models to assess its association with adverse outcomes previous to death: number of hospitalized days in the previous year and number of visits to a physician in the previous year, in unadjusted and adjusted models. Results. From a total of 2,649 individuals the mean of age was 74.8 (±11.4) and 56.3% (n = 1,183) were women. The mean of the FI was of 0.279 (±SD 0.131, R = 0.0–0.738) and distribution was biased to the right. There was a significant association (p < 0.001) between the FI and number of hospitalized days (β = 45.7, 95% CI 36.1–55.4, p < 0.001) and for the number of visits to a physician (β = 25.93, 95% CI 19.27–32.6, p < 0.001) both models adjusted for age and sex. Conclusion. The FI constructed with next-of-kin data showed similar characteristics to similar indexes of older adults. It was independently associated with health care use.