Gardening interventions yield a multitude of measurable benefits that are evaluable within the context of a clinical trial. Harvest for Health forges new inroads in the delivery of holistic interventions to high risk populations, in this case, older cancer survivors. Since the intervention banks on an existing organization's infrastructure, it can easily be disseminated nationwide. The next step is to prove efficacy - an essential step in contributing to the science in this area, and one which is crucial for future dissemination.
There are roughly 15 million cancer survivors in the US, comprising 4% of the populace. The number of cancer survivors is skyrocketing due to a confluence of the following factors: 1) Americans are aging; 2) cancer is an age-related disease (\>60% of cancer survivors are age 65+); and 3) improvements in early detection and treatment have resulted in many common cancers having 5-year cure rates that surpass 90%. Rising numbers of cancer survivors is good news, but over $130 billion annually is needed to address subjects long-term health and psychosocial needs.113 Compared to others, cancer survivors are at higher risk for other cancers, CVD, osteoporosis, and diabetes. Accelerated functional decline also is a major problem for cancer survivors, especially those who are older. Baker et al. found that compared to age-matched controls, cancer cases (n=45,494) had significantly lower physical and social functioning, vitality, mental health, and HRQoL (p\<0.001). Results of others are similar and suggest that cancer survivors face functional decline that threatens subject ability to live independently, posing a burden to themselves, subject families and the health care system. Programs exist in land grant universities in all 50 United States. Certified MGs complete \> 100 hrs. of training and community service (CS) and 25 hrs./year of CS to maintain active status. In surveying 184 MGs in AL, the investigators found that 71% were "extremely interested" in mentoring a cancer survivor on vegetable gardening for subject CS, and an extra 26% stated that "they were interested and wanted to learn more." Thus, the project is of great interest and builds on an extant infrastructure for sustainability. Ultimately, this intervention could be disseminated to states with 3 growing seasons and adapted to colder weather in those with 2 growing seasons (36 states where 10.8 million older cancer survivors reside). The intervention also could be adapted for persons with other chronic diseases in which physical functioning and lifestyle behaviors are key. Finally, this project is significant because the intervention has great potential for sustainability since gardening: (a) involves many activities which prevent burn-out common with other forms of exercise, and allows participants to pursue PA outdoors which is related to greater enjoyment; (b) provides a sense of achievement and zest for life that come from nurturing and observing new life and growth; and (c) imparts natural prompts since plants require regular care (watering) and attention (harvesting) and serve as continual and dynamic behavioral cues.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
DOUBLE
Enrollment
381
Provided with supplies to plan/plant 3 vegetable gardens over the course of a year. Survivors will be paired with a master gardener from their local Cooperative Extension to help guide them and provide mentorship in vegetable gardening,
Subjects will be monitored for 1-year and will then receive the same vegetable gardening intervention as described under the Immediate Gardening Intervention
University of Alabama at Birmingham
Birmingham, Alabama, United States
Percent of subjects in each group at year 1 who meet ALL 3 of 3 of the following goals: Physical performance tests, plasma α-carotene, and accelerometry-measured physical exam
Percent of subjects in each group at year 1 who meet ALL 3 of 3 of the following goals: Physical performance tests, plasma α-carotene, and accelerometry-measured PA * \>5-point increase on the Short Form 36 Physical Function subscale \[SF36 PFSS\] AND improvement on the Senior Fitness Battery * Increase in intake of ½ c of vegetables and fruits/day AND increase is plasma alpha-carotene. * Increase of \>30 minutes per week of moderate to vigorous physical activity AND confirmatory increase in physical activity as assessed by accelerometry.
Time frame: 1 year after baseline
Mean Physical Functioning (SF36 physical function subscale) score in each group
The 10-item scale measures perceived limitations to various physical tasks in which the participant response "limited a lot," "limited a little" or "not limited at all" (A 3-point scale is used and the score is transformed to a 0-100 point scale in which a score of 50 reflects an average score (with a 100 reflecting no limitations and 0 means severe limitations in multiple domains
Time frame: 1 years after baseline
Mean physical performance (senior fitness battery) score
The Senior Fitness Test Battery tests several physical function domains: i.e., lower and upper body strength (using the 30-second chair stand and arm curl), endurance (using the 2-minute step test), flexibility (using the chair sit-and-reach and back scratch), and agility/dynamic balance (using the 8-ft Get Up \& Go). Each test is backed by age and gender appropriate population-based norms; cutpoints denoting high risk for low function are as follows: * 30-second chair stand: \<8 unassisted stands * Arm curl: \<11 curls * 2-minute step test: \<65 steps * Chair sit-and-reach: -4 cm in men and -2 cm in women * Back scratch: -4 cm in men and -2 cm in women * 8 foot Get up and Go: \> 9 seconds
Time frame: 1 year after baseline
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Mean vegetable and Fruit Consumption in each group
The number of daily ½ cup servings of vegetables and fruits will be measured by the Eating at America's Table Screener (EATS) questionnaire; this 10-item NCI-developed questionnaire will be able to assess whether individuals meet the goal (2.5 cups per day) or not.
Time frame: 1 year after baseline
Mean plasma alpha carotene value in each group
Plasma α-carotene will be quantified via high-performance liquid chromatography methods using a Hitachi 911clinical analyzer with standard chemistries by Roche (Indianapolis, IN). The range of α-Carotene varies from 0.1 to 0.90 μmol/ with a mean score of 0.5. This test is conducted for research purposes only. Thus, while a range between 0.50 and 0.90 is desirable, there are no clinically agreed guidelines to provide patients with information on lower levels.
Time frame: 1 year after baseline
Mean rate of physical activity (self report via the CHAMPS and accelerometry
Physical activity will be measured via self-report, using the Community Healthy Activities Models Program for Seniors (CHAMPS), a validated and sensitive tool that captures physical activities specific to older adults. This instrument will be used to assess minutes of moderate to vigorous activity per week. Objective levels of physical activity, will be captured via accelerometry. All participants will be asked to wear an activity monitor on their waist for 7 days at baseline, 1- and 2- year follow-up. Readings obtained from accelerometry also will be used to assess the minutes of moderate to vigorous physical activity.
Time frame: 1 year after baseline
Mean percent improvement on the Senior Fitness Battery test
Change from baseline to 1-year follow-up in each measure of physical performance will be compared between those in the immediate vs. delayed intervention groups at 1-year.
Time frame: 1 year post baseline
Mean percentage BMI score at 2 years post baseline
An improved diet and improved physical activity is associated with a weight status within the normal range, we will assess changes in weight status over the study period by measuring height (at baseline), and weight (using a platform scale) at all timepoints. Weights and heights will be converted to MI (KG/M2). The percentage of each study arm categorized as normal weight (BMI 18.5 - 24.9) at each time point.
Time frame: baseline to 2 years
Mean Quality of Life (SF36) score at 2 years
The SF-36 offers scores for mental health and physical health. These scores are each transformed to a 0-100 point scale in which a score of 50 reflects an average score (with a 100 reflecting optimal status and 0 meaning severly compromised (minimal) status
Time frame: 2 years after baseline
Mean telomerase score in each group
PENDING RECEIPT OF ANCILLARY FUNDING: Telomerase activity will be measured in blood sample buffy coats using the Telomerase PCR ELISA assay (Boehringer Mannheim). While many individuals will express non-detectable levels, the percentage of individuals who have optimal levels of 0.20-1.5 will be compared in each arm
Time frame: 1 year post baseline
Mean IL-6 and TNF alpha score in each arm
IL-6 will be assessed IN PLASMA via electrochemiluminescence (Meso-scale Discovery; Gaithersburg, MD). AN ANTICIPATED RANGE OF 0.015 to 11.5 pg/ml IS ANTICIPATED, WITH LOWER LEVELS INDICATING LESS INFLAMMATION AND LOWER RISK FOR CHRONIC DISEASE (VALUES \<1.47)
Time frame: 1 year post baseline