C García-Peña1, M U Pérez-Zepeda. 1. Mario Ulises Pérez Zepeda Geriatric Epidemiology Research Department at the Instituto Nacional de Geriatría, Periférico Sur 2767, colonia San Jerónimo Lídice, delegación La Magdalena Contreras, ciudad de México, Distrito Federal, México. Phone number: +52 55 55739087, ulises.perez@me.com, mperez@inger.gob.mx.
Abstract
OBJECTIVE: The main objective was to test the validity of height estimated by knee height in Mexican older adults, as a surrogate for standing height. DESIGN: Cohort study. SETTING: Data were drawn from the first and third waves of the Mexican Health and Aging Study. PARTICIPANTS: Included participants were community-dwelling 50-year or older adults with measured height at baseline and in follow-up. Subjects with a lower limb fracture in the follow-up were excluded. MEASUREMENTS: Main measurements were baseline standing height and 11-year follow-up and knee-estimated height in follow-up. Population specific equations were used to estimate standing height from knee height. Comparisons between baseline standing height and knee-derived height were done with simple correlations, limits of agreement (Bland-Altman plot) and Deming regressions. RESULTS: A total of 136 50-year or older adults were followed-up for eleven years, with a mean age of 60. There was a positive correlation between knee-estimated height and baseline standing height of 0.895 (p<0.001) for men and of 0.845 (p<0.001) for women. Limits of agreement for men were from -6.95cm to 7.09cm and for women from -6.58cm to 8.44cm. CONCLUSION: According to our results, knee-estimated height could be used interchangeably with standing height in Mexican older adults, and these results might apply also to other populations.
OBJECTIVE: The main objective was to test the validity of height estimated by knee height in Mexican older adults, as a surrogate for standing height. DESIGN: Cohort study. SETTING: Data were drawn from the first and third waves of the Mexican Health and Aging Study. PARTICIPANTS: Included participants were community-dwelling 50-year or older adults with measured height at baseline and in follow-up. Subjects with a lower limb fracture in the follow-up were excluded. MEASUREMENTS: Main measurements were baseline standing height and 11-year follow-up and knee-estimated height in follow-up. Population specific equations were used to estimate standing height from knee height. Comparisons between baseline standing height and knee-derived height were done with simple correlations, limits of agreement (Bland-Altman plot) and Deming regressions. RESULTS: A total of 136 50-year or older adults were followed-up for eleven years, with a mean age of 60. There was a positive correlation between knee-estimated height and baseline standing height of 0.895 (p<0.001) for men and of 0.845 (p<0.001) for women. Limits of agreement for men were from -6.95cm to 7.09cm and for women from -6.58cm to 8.44cm. CONCLUSION: According to our results, knee-estimated height could be used interchangeably with standing height in Mexican older adults, and these results might apply also to other populations.
Entities:
Keywords:
Body height; body mass index; geriatric assessment; validation
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