The journal of nutrition, health & aging · 2020
Sunlight Exposure and Vitamin D Levels in Older People- An Intervention Study in Swedish Nursing Homes.
СтатьяРандомизированное исследованиеПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Samefors M, Tengblad A, Östgren C J
Аннотация
OBJECTIVES: Older people are recommended to take oral vitamin D supplements, but the main source of vitamin D is sunlight. Our aim was to explore whether active encouragement to spend time outdoors could increase the levels of serum 25-hydroxyvitamin D (25(OH)D) and increase the mental well-being of nursing home residents.
DESIGN: A cluster randomized intervention trial.
SETTING: Nursing homes in southern Sweden.
PARTICIPANTS: In total 40 people >65 years.
INTERVENTION: The intervention group was encouraged to go outside for 20-30 minutes between 11 a.m. and 3 p.m. every day for two months during the summer of 2018.
MEASUREMENTS: We analyzed serum 25(OH)D before and after the summer. Data from SF-36 questionnaires measuring vitality and mental health were used for the analyses.
RESULTS: In the intervention group, the baseline median (interquartile range (IQR)) of serum 25(OH)D was 42.5 (23.0) nmol/l and in the control group it was 52.0 (36.0) nmol/l. In the intervention group, the 25(OH)D levels increased significantly during the summer (p=0.011). In the control group, there was no significant change. The intervention group reported better self-perceived mental health after the summer compared to before the summer (p=0.015). In the control group, there was no difference in mental health.
CONCLUSION: Active encouragement to spend time outdoors during summertime improved the levels of serum 25(OH)D and self-perceived mental health significantly in older people in nursing homes and could complement or replace oral vitamin D supplementation in the summer.
DESIGN: A cluster randomized intervention trial.
SETTING: Nursing homes in southern Sweden.
PARTICIPANTS: In total 40 people >65 years.
INTERVENTION: The intervention group was encouraged to go outside for 20-30 minutes between 11 a.m. and 3 p.m. every day for two months during the summer of 2018.
MEASUREMENTS: We analyzed serum 25(OH)D before and after the summer. Data from SF-36 questionnaires measuring vitality and mental health were used for the analyses.
RESULTS: In the intervention group, the baseline median (interquartile range (IQR)) of serum 25(OH)D was 42.5 (23.0) nmol/l and in the control group it was 52.0 (36.0) nmol/l. In the intervention group, the 25(OH)D levels increased significantly during the summer (p=0.011). In the control group, there was no significant change. The intervention group reported better self-perceived mental health after the summer compared to before the summer (p=0.015). In the control group, there was no difference in mental health.
CONCLUSION: Active encouragement to spend time outdoors during summertime improved the levels of serum 25(OH)D and self-perceived mental health significantly in older people in nursing homes and could complement or replace oral vitamin D supplementation in the summer.