Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan.
Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima 770-8504, Japan.
Exp Gerontol. 2018 Sep;110:86-91. doi: 10.1016/j.exger.2018.05.017. Epub 2018 May 26.
There is limited information on the relationship of low body mass index (BMI) to the geriatric conditions in elderly patients.
The objective of this study is to investigate whether low BMI associates with geriatric status in elderly patients by calculating suitable cut-off point of BMI for assessment of geriatric conditions.
A total of 1223 elderly patients was enrolled (male/female: N = 472/751), and cut-off point of the BMI values to assess the geriatric status such as aspiration pneumonia, cognitive impairment was determined by receiver operating characteristic (ROC) analyses. Logistic regression analyses were performed to examine the association between several geriatric status and low BMI. Of these patients, 262 patients (male/female: 101/161) had received standard rehabilitation treatment. Functional Independence Measure (FIM) scores were measured both at admission and discharge to calculate FIM gain and efficiency, and retrospective cohort study was performed.
Cut-off point of BMI value to assess the geriatric status was determined (19.0 kg/m). Significant associations of low BMI to several geriatric factors such as loss of posterior occlusion, cognitive impairment were observed in both male and female. FIM scores in above cut-off point group were significantly higher than in below cut-off point group in female (FIM gain, P = 0.0005; FIM efficiency, P = 0.0025, Mann-Whitney U test). On the other hand, there were no significant differences between low and above BMI cut-off point in FIM scores of male patients.
Low BMI might be a useful parameter to evaluate the geriatric status, and the viewpoint would contribute to decide the care plan for the good end-of-life of elderly.
关于低体重指数（BMI）与老年患者老年病的关系，信息有限。
本研究旨在通过计算评估老年病的 BMI 值合适切点，探讨低 BMI 是否与老年患者的老年病状况相关。
共纳入 1223 例老年患者（男/女：N=472/751），通过受试者工作特征（ROC）分析确定 BMI 值切点来评估吸入性肺炎、认知障碍等老年病状况。采用 logistic 回归分析探讨几种老年病状况与低 BMI 的相关性。其中 262 例患者（男/女：101/161）接受了标准康复治疗。入院和出院时均测量功能独立性测量（FIM）评分，计算 FIM 增益和效率，并进行回顾性队列研究。
确定了评估老年病状况的 BMI 值切点（19.0kg/m²）。在男性和女性中，低 BMI 与多个老年病因素如后牙咬合丧失、认知障碍均显著相关。在女性中，高于切点组的 FIM 评分显著高于低于切点组（FIM 增益，P=0.0005；FIM 效率，P=0.0025，Mann-Whitney U 检验）。另一方面，男性患者的 BMI 低于和高于切点组的 FIM 评分无显著差异。
低 BMI 可能是评估老年病状况的有用参数，这一观点有助于制定老年患者的护理计划，以实现良好的临终关怀。
