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Both youth and long-term vitamin D status is associated with risk of type 2 diabetes mellitus in adulthood: a cohort study.

Both youth and long-term vitamin D status is associated with risk of type 2 diabetes mellitus in adulthood: a cohort study.
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Wu F, Juonala M, Pitkänen N, Jula A, Lehtimäki T, Sabin MA, Pahkala K, Hutri-Kähönen N, Kähönen M, Laitinen T, Viikari JSA, Magnussen CG, Raitakari OT,


Wu F, Juonala M, Pitkänen N, Jula A, Lehtimäki T, Sabin MA, Pahkala K, Hutri-Kähönen N, Kähönen M, Laitinen T, Viikari JSA, Magnussen CG, Raitakari OT, (click to view)

Wu F, Juonala M, Pitkänen N, Jula A, Lehtimäki T, Sabin MA, Pahkala K, Hutri-Kähönen N, Kähönen M, Laitinen T, Viikari JSA, Magnussen CG, Raitakari OT,

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Annals of medicine 2017 11 07() 1-9 doi 10.1080/07853890.2017.1399446
Abstract
OBJECTIVES
To determine whether vitamin D status in childhood and adolescence (herein collectively referred to as youth) and the long-term status from youth to adulthood is associated with risk of developing type 2 diabetes mellitus (T2DM) and impaired fasting glucose (IFG) in adulthood.

MATERIALS AND METHODS
This was a 31-year follow-up study of 2300 participants aged 3-18 years. Multinomial logistic regression was used to assess the association of both (a) baseline 25-hydroxyvitamin D (25OHD) levels and (b) the mean of baseline and the latest follow-up 25OHD levels (continuous variable and quartiles) with incident T2DM and IFG (cut-off = 5.6 mmol/L) in adult life.

RESULTS
High serum 25OHD levels in youth and also mean values from youth to adulthood were associated with reduced risk of developing T2DM in adulthood (odds ratio, 95% confidence interval= 0.73, 0.57-0.95 and 0.65, 0.51-0.84, respectively, for each SD increment in 25OHD). Compared to Q1, a dose-dependent negative association was observed across other quartiles of youth 25OHD, while the strongest association was found in the Q3 for the mean 25OHD levels. Neither youth nor the mean 25OHD was associated with IFG.

CONCLUSIONS
High serum 25OHD levels in youth, and from child to adult life, were associated with a reduced risk of developing T2DM in adulthood. Key Messages High serum 25OHD levels in youth, and between youth and adulthood, were associated with a lower risk of T2DM in adulthood. Each SD (15.2 nmol/L) increment in youth serum 25OHD levels was associated with a 26% reduction in odds for T2DM, which was independent of a number of confounding variables and other risk factors for T2DM. A similar magnitude of association was observed for the long-term 25OHD levels between youth and adulthood. These findings suggest a potentially simple and cost-effective strategy for reducing adulthood risk of T2DM starting in an earlier stage of life – improving and maintaining vitamin D status throughout youth and early adulthood.

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