Exploring the range of ideal body mass index for hospitalized older adults
10.3760/cma.j.issn.0254-9026.2023.11.003
- VernacularTitle:住院老年人的理想体质指数范围探讨
- Author:
Wenbin WU
1
;
Qi ZHOU
;
Hong LI
;
Jie ZHANG
;
Ji SHEN
;
Jing LI
;
Hong SHI
Author Information
1. 北京医院老年科 国家老年医学中心 中国医学科学院老年医学研究院，北京 100730
- Keywords:
Body mass index;
Obesity;
Malnutrition;
Comprehensive geriatric assessment
- From:
Chinese Journal of Geriatrics
2023;42(11):1285-1290
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the ideal body mass index(BMI)range for hospitalized older adults with good functional ability.Methods:Data on inpatients thorough comprehensive geriatric assessment, including sex, age, BMI, ethnicity, and 9 functional indicators(basic daily mobility, instrumental daily mobility, frailty, cognition, depression, sleep, swallowing function, somatic activity, and grip strength)were collected in the geriatric department between January 2020 and November 2022.To determine the ideal BMI range, Logistic regression was used to analyze the dose-response relationships between BMI and functional ability.The findings were then validated by looking at the 5%-95% range of BMI among elderly people with normal functional ability.Results:A total of 1 950 hospitalized elderly adults were included in the study, with the age ranging from 60-103(77.2±8.9)years and women making up 50.8% of the participants.The average BMI was(23.4±3.6)kg/m 2; 8.9%(n=174)of the participants were low body weight and 8.7%(n=171)obese.Between 12.1%-66.0% of patients showed deterioration in the indicators of functional ability.With a higher BMI, there was a trend of decreasing functional ability in the elderly.Compared with people with a BMI between 20.0-24.9 kg/m 2, a BMI<20.0 kg/m 2 was a risk factor for bodily functional abnormality( OR: 1.49-2.06, all P<0.01). There was no clear risk for functional abnormality if the BMI was between 28.0-29.9 kg/m 2.In fact, in this BMI range, there was even a protective effect for grip strength and cognitive ability( OR=0.42, 0.25, both P<0.01). Of 214 elderly participants with normal values in all parameters, the 95% confidence interval of BMI ranged from 19.8 to 28.8 kg/m 2. Conclusions:To maintain appropriate functional ability for elderly inpatients, the optimal BMI range is between 20.0 kg/m 2 and 29.9 kg/m 2.
