Effects of the Combined Intervention of Exercise, Fruit, and Vitamin Supplementation on Frailty in Older Adults
- Conditions
- Frailty
- Interventions
- Behavioral: the combined intervention of exercise, fruit, and vitamin supplementation
- Registration Number
- NCT06225271
- Lead Sponsor
- Nanjing Medical University
- Brief Summary
The goal of this cohort-based cluster-randomized controlled trial is to investigate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on frailty among older adults. Older individuals aged 65\~80 years old with low physical activity levels and low fruit intake will be recruited. 14 clusters will be randomized into 2 arms with 1:1 ratio. Participants in the intervention arm will receive the combined intervention of physical activity, fruit, and vitamin supplementation 3 times a week for 2 months (the 1st and 6th months). They will also be given group interventions, such as self-management group activity or health education, at least once a week. Participants in the control arm will not receive any intervention.
- Detailed Description
Objectives Primary objectives
• To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on preventing muscle loss among older adults over the 12-month period.
Secondary objectives
* To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on preventing muscle loss in older adults over 6 months.
* To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on ameliorating frailty in older adults over 6 and 12 months.
* To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on improving healthy behavior of physical activity and fruit intake in older adults over 12 months.
* To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on lower the risk of all-cause death, cardiovascular and cerebrovascular disease in the older adults over 12 and 24 months.
* To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on regulating blood lipids in the older adults over 12 and 24 months.
* To evaluate the effect of the combined intervention of exercise, fruit, and vitamin supplementation on regulating blood glucose in the older adults over 12 and 24 months.
* To evaluate the health economic effectiveness of the combined intervention of exercise, fruit, and vitamin supplementation.
Sample size
Sample size was estimated using the Power Analysis and Sample Size (PASS) software (version 15.0.5) based on data from published research. Previous studies showed that the Cohens' d value was between 0.18\~1.78. With these data, we estimated effect size of Cohen' d = 0.45, considering probabilities of 5% for type I error, 20% for type II error, and 0.05 for intraclass correlation coefficient (ICC). We randomized all 14 clusters (villages) into two arms with 1:1 ratio, and the total sample size was calculated to be 700 (50 participates per cluster). A conservative estimate of 25% loss to follow-up or drop-out indicates a total of 934 participates is needed.
Statistical analysis
Categorical variables are presented as frequencies (n) and percentages (%). Continuous data is reported as means and standard deviation (SD) or medians (interquartile range) for non-normality of distribution.
The primary analysis will compare the change in handgrip strength at 12 months from baseline between the intervention and control groups using the cluster-adjusted generalized linear mixed model (GLMM). The primary analyses will be intention-to-treat.
Secondary analyses:
1. Compare the change in handgrip strength at 6 months from baseline between the intervention and control groups using the cluster-adjusted GLMM.
2. Compare the change in frailty scale at 6 months and 12 months from baseline between the control and intervention groups using the cluster-adjusted GLMM.
3. Compare the change in physical activity volume and intensity and fruit intake and frequency at 12 months from baseline. This will be achieved by comparing the least square mean between groups.
4. Compared the incidence of a composite of all-cause death, cardiovascular and cerebrovascular diseases using Poisson regression model.
5. Compare the incidence of all-cause death using Poisson regression model.
6. Compare the incidence of cardiovascular and cerebrovascular using Poisson regression model.
7. Compared the change in lipid indicators at 12 months and 24 months from baseline between the intervention and control groups using the cluster-adjusted GLMM.
8. Compared the change in glucose indicators at 12 months and 24 months from baseline between the intervention and control groups using the cluster-adjusted GLMM.
9. Incremental cost-effectiveness ratio (ICER). The outcome defined as the excess cost of a strategy over the cost of the baseline strategy divided by the incremental difference in effectiveness between the strategy in question and the baseline strategy.
Recruitment & Eligibility
- Status
- NOT_YET_RECRUITING
- Sex
- All
- Target Recruitment
- 934
- Permanent resident population aged 65~80 years;
- Able to walk independently indoors and outdoors;
- Physical activity less than 1400 metabolic equivalent task (MET)-min/week and fruit intake less than 50 g/day；
- Have not taken vitamin B and vitamin C supplementation in the past 3 months.
- Presence of a history of fracture;
- Patients with severe impairment of renal or hepatic fuction. Severe hepatic impairment is defined as serum alanine aminotransferase and aspartate aminotransferase levels above 100 U/L, while severe renal impairment is defined as estimated glomerular filtration rate (eGFR) < 45 mL/min, calculated according to the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Intervention group the combined intervention of exercise, fruit, and vitamin supplementation Participants in the intervention group will receive group intervention and individual intervention. Group interventions will include participants' communication meeting and other approach, such as self-management group. They will also receive the combined intervention of physical activity, fruit, and vitamin supplementation 3 times a week for 2 months (the 1st and 6th months).
- Primary Outcome Measures
Name Time Method The change in handgrip strength at 12 months from baseline. Baseline and 12 months Handgrip strength will be measured using a hand-held grip dynamometer. Participants will be asked to grip the dynamometer with left hand and right hand respectively while standing, maintaining their arm close to the body and straight down, exerting maximum force. This test will be conducted 3 times, and the values will be recorded in kilograms.
- Secondary Outcome Measures
Name Time Method The incidence of cardiovascular and cerebrovascular diseases over 12 and 24 months. 12 months, and 24 months The change in low-density lipoprotein cholesterol (LDL-C) at 12 months and 24 months from baseline. Baseline, 12 months, and 24 months The change in handgrip strength at 6 months from baseline. Baseline and 6 months Handgrip strength will be measured using a hand-held grip dynamometer. Participants will be asked to grip the dynamometer with left hand and right hand respectively while standing, maintaining their arm close to the body and straight down, exerting maximum force. This test will be conducted 3 times, and the values will be recorded in kilograms.
The incidence of a composite of all-cause death, cardiovascular and cerebrovascular diseases over 12 and 24 months. 12 months, and 24 months The change in the quantity and frequency of fruit intake at 12 months from baseline. Baseline and 12 months Fruit intake will be collected by questionnaire for the frequency of consumption and weights per intake. The frequency will be determined by filling in the number of times the participants eat fruit per week/day/monthly/year. Fruit quantity is determined by the product of frequency and weights of a single fruit intake.
The change in physical activity volume and intensity at 12 months from baseline. Baseline and 12 months Information on physical activity levels during the past week will be collected through the International Physical Activity Questionnaire Scale-Short Form (IPAQ-SF). The IPAQ-SF captures four levels of physical activity intensity: vigorous-intensity physical activity, moderate-intensity physical activity, walking time, and average sitting time on weekdays, including sedentary work. Physical activity volume will be determined by summing the metabolic equivalent task (MET)-min/week values for walking, moderate physical activity, and vigorous physical activity. Higher values represent higher levels of physical activity, with a minimum value of 0.
The change in high density lipoprotein cholesterol (HDL-C) at 12 months and 24 months from baseline. Baseline, 12 months, and 24 months The change in frailty index at 6 months and 12 months from baseline. Baseline, 6 months, and 12 months Outcome is defined as the change in the score of modifiable variables in the frailty index from baseline. The frailty index consisted 28 variables covering age, physical measurement, sleep quality, history of surgery, fall, and fracture, history of the disease, oral hygiene, respiratory function, and physical function self-assessment aspects. 24 of the 28 variables can be changed. The frailty index is a continuous variable that ranged from 0 to 33, with a higher value indicating a worse, frailer status.
Incremental cost-effectiveness ratio (ICER) Baseline and 12 months The outcome defined as the excess cost of a strategy over the cost of the baseline strategy divided by the incremental difference in effectiveness between the strategy in question and the baseline strategy.
The incidence of all-cause death over 12 and 24 months. 12 months, and 24 months The change in total cholesterol (TC) at 12 months and 24 months from baseline. Baseline, 12 months, and 24 months The change in triglycerides (TG) at 12 months and 24 months from baseline. Baseline, 12 months, and 24 months The change in fasting blood glucose at 12 months and 24 months from baseline. Baseline, 12 months, and 24 months