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Nishikura T, Kitamura K, Watanabe Y, Kabasawa K, Saito T, Takahashi A, Takachi R, Kobayashi R, Oshiki R, Tsugane S, Watanabe K, Nakamura K. Low plasma 25-hydroxyvitamin D levels are not associated with a high risk of recurrent falls in community-dwelling Japanese adults: the Murakami cohort study. Arch Osteoporos 2024; 19:25. [PMID: 38568437 DOI: 10.1007/s11657-024-01381-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 03/19/2024] [Indexed: 04/05/2024]
Abstract
Reports on the association between vitamin D levels and fall risk have been mixed, and long-term follow-up studies are lacking. This 5-year cohort study of 5,343 community-dwelling Japanese people aged 40-74 years found that low vitamin D levels are not associated with a high risk of recurrent falls. PURPOSE Findings of cohort studies on the association between plasma 25-hydoxyvitamin D (25[OH]D) levels and fall risk have been mixed, and long-term follow-up studies are lacking. The present study investigated whether low plasma 25(OH)D levels are longitudinally associated with a high risk of recurrent falls in adults. METHODS This 5-year cohort study included 5,343 community-dwelling Japanese people aged 40-74 years. Baseline blood collection and a questionnaire survey were conducted in 2011-2013. Plasma 25(OH)D levels were determined and divided into quintiles after stratification by season, sex, and age group. Information on recurrent falls occurring in the year before the survey 5 years later was obtained, and participants with two or more falls were considered to have experienced recurrent falls. Covariates were sex, age, marital status, education, occupation, BMI, total physical activity levels, calcium intake, vitamin K intake, smoking, drinking, and disease history. RESULTS Mean age and 25(OH)D levels were 60.9 years and 50.9 nmol/L, respectively. In the follow-up survey, 209 recurrent falls were reported. Plasma 25(OH)D levels were not significantly associated with the occurrence of recurrent falls in men, women, or men/women-combined (adjusted P for trend = 0.1198, 0.8383, and 0.2355, respectively). In men and men/women-combined, adjusted ORs for recurrent falls in the lowest quintile were significantly lower (adjusted OR = 0.42 and 0.59, respectively) than the middle quintile (reference). CONCLUSION Low plasma 25(OH)D levels are not associated with a high risk of recurrent falls in middle-aged and older people. Further longitudinal studies will be needed to confirm our findings in other populations.
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Affiliation(s)
- Toshi Nishikura
- Division of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan
- Department of Rehabilitation, Niigata University of Rehabilitation, 2-16 Kaminoyama, Murakami, Niigata, 958-0053, Japan
| | - Kaori Kitamura
- Division of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan
| | - Yumi Watanabe
- Division of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan
| | - Keiko Kabasawa
- Department of Health Promotion Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan
| | - Toshiko Saito
- Division of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan
| | - Akemi Takahashi
- Department of Rehabilitation, Niigata University of Rehabilitation, 2-16 Kaminoyama, Murakami, Niigata, 958-0053, Japan
| | - Ribeka Takachi
- Department of Food Science and Nutrition, Nara Women's University Graduate School of Humanities and Sciences, Kitauoya-Higashimachi, Nara, 630-8506, Japan
| | - Ryosaku Kobayashi
- Department of Rehabilitation, Niigata University of Rehabilitation, 2-16 Kaminoyama, Murakami, Niigata, 958-0053, Japan
| | - Rieko Oshiki
- Department of Rehabilitation, Niigata University of Rehabilitation, 2-16 Kaminoyama, Murakami, Niigata, 958-0053, Japan
| | - Shoichiro Tsugane
- International University of Health and Welfare Graduate School of Public Health, 4-1-26 Akasaka, Minato-Ku, Tokyo, 107-8402, Japan
| | - Kei Watanabe
- Department of Orthopaedic Surgery, Niigata University Medical and Dental Hospital, 754 Asahimachi-Dori, Niigata, 951-8520, Japan
| | - Kazutoshi Nakamura
- Division of Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Niigata, 951-8510, Japan.
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