Test-retest reliability of Latin American Group for Maturity (GDLAM) protocol in older women

Abstract

Functional autonomy (FA) is a critical factor in determining the quality of life of older adults (OA), especially in the case of older women (OW), as they face a decline in FA in their later years of life. FA should be assessed early, using valid, reliable, and low-cost tests. This study evaluated the test-retest reliability of GDLAM and GDLAM autonomy index (GI) in OW. Thirty-nine OW (71.2 ± 6.50 years) participated in the study. A repeated measures design was used to compare the interday test-retest reliability of the five GDLAM tests (seconds) and the GI (points). The five tests represent activities of daily living, such as dressing or wandering around the house, while the GI provides a weighting of the results of the five tests. The analysis consisted of the intraclass correlation coefficient (ICC), standard error of measurement (SEM), and coefficient of variation (CV). A CV ≤ 10% and an ICC ≥ 0.80 were considered acceptable reliability, whereas a CV ≤ 5% and an ICC ≥ 0.90 were considered high reliability. The outcome of the five tests, represented by the GI, showed high interday test-retest reliability (CV = 6.00% and ICC = 0.91). The results of this study demonstrate that the five tests of the GDLAM protocol and the GI have high interday test-retest reliability and good interday reproducibility. From a practical point of view, the GDLAM protocol allows the assessment of FA of community-dwelling OW, providing background for early diagnosis and, with it, the possibility of developing an individualized physical exercise prescription.

Fig 1. Research design.

Fig 2. Pearson test and regression line between test-retest of the GDLAM’S protocol.

GI, Latin-American Development to the Maturity Group [GDLAM] index of autonomy; PTS, to put on and take off a T-shirt; s, seconds; SCMA, to sit and get up from the chair and move around the house; SPP, standing up from the prone position; SSP, stand up from sitting position; W10 m, walk 10 meters.

Fig 3. Bland-Altman analysis.

The solid line represents the average differences between variables evaluated through a 6-min rowing test. The segmented lines represent 95% of the upper and lower confidence limits. GI, Latin-American Development to the Maturity Group [GDLAM] index of autonomy; PTS, to put on and take off a T-shirt; s, seconds; SCMA, to sit and get up from the chair and move around the house; SPP, standing up from the prone position; SSP, stand up from sitting position; W10 m, walk 10 meters.