Graduate Program in Rehabilitation Science, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
Graduate Program in Public Health, Faculty of Medicine, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
Braz J Phys Ther. 2021 Mar-Apr;25(2):186-193. doi: 10.1016/j.bjpt.2020.05.008. Epub 2020 Jun 9.
The functional gait assessment (FGA) is a reliable instrument to evaluate walking balance in the Brazilian older population. However, other measurement properties need investigation.
To determine the construct and criterion validity of the FGA-Brazil and its ceiling and floor effects.
Sociodemographic, clinical, and anthropometric data were collected from 126 older adults. Participants completed the Mini-mental state examination followed by the FGA-Brazil, Berg balance scale (BBS), gait speed, and the Falls Efficacy Scale-International. Six months later, the participants were interviewed by telephone about their fall history. Exploratory factor analysis was used to determine the structural validity. We also determined the construct validity of the FGA-Brazil, using hypothesis testing, by investigating the differences between groups using the Mann-Whitney U test. Criterion validity was determined using the Spearman correlation between the FGA-Brazil and the other balance and gait measures, and using the Receiver Operator Characteristic curve.
Participants' mean age was 69.3 ± 7.4 years, and 84 (69.4%) were female. Factor analysis resulted in two factors explaining 53.3% of the total variance. Moderate and high significant correlations were found between the FGA-Brazil and gait speed (r = 0.65) and BBS (r = 0.80). A significant difference in the FGA-Brazil median score between older adults with low and high concern about falls was observed. The cutoff score recommended for predicting falls was 22 or less. No ceiling and floor effects were observed.
We recommend the FGA-Brazil to determine the risk of falls in community-dwelling older adults.
功能性步态评估（FGA）是一种可靠的工具，可用于评估巴西老年人群的步行平衡。然而，其他测量特性仍需要进一步研究。
确定 FGA-Brazil 的结构效度和标准效度及其天花板和地板效应。
从 126 名老年人中收集社会人口统计学、临床和人体测量学数据。参与者完成了简易精神状态检查，然后进行了 FGA-Brazil、伯格平衡量表（BBS）、步行速度和跌倒效能量表-国际版的测试。6 个月后，通过电话对参与者进行了跌倒史访谈。使用探索性因子分析来确定结构效度。我们还通过 Mann-Whitney U 检验来比较组间差异，检验 FGA-Brazil 的结构效度，从而确定其构建效度。标准效度通过 FGA-Brazil 与其他平衡和步态测量值之间的 Spearman 相关来确定，并使用接收器操作特征曲线进行确定。
参与者的平均年龄为 69.3±7.4 岁，84 人（69.4%）为女性。因子分析得出两个因子，解释了总方差的 53.3%。FGA-Brazil 与步行速度（r=0.65）和 BBS（r=0.80）之间存在中度至高度显著相关性。在对跌倒关注度较低和较高的老年人之间，FGA-Brazil 的中位数评分存在显著差异。建议将 22 或更低的分数作为预测跌倒的截断值。未观察到天花板和地板效应。
我们推荐使用 FGA-Brazil 来评估社区居住的老年人跌倒的风险。
