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Poor sleep 1.5 X more likely if less than 20 ng of Vitamin D – Feb 2019

Serum 25-hydroxyvitamin D3 levels and poor sleep quality in a Japanese population: the DOSANCO Health Study.

Sleep Med. 2019 Feb 22;57:135-140. doi: 10.1016/j.sleep.2019.01.046
Nakamura K1, Hui SP2, Ukawa S3, Okada E4, Nakagawa T5, Okabe H2, Chen Z2, Miura Y6, Chiba H7, Tamakoshi A8.


20% of Japanese adults are unsatisfied with their sleep
32% of participants located at42 degrees North Latitude were unsatisfied with their sleep

Vitamin D ng/mL Poor SleepDepression

Sleep category starts with

96 items in sleep category

A few items in SLEEP category

Sleep is aided by Vitamin D + Vitamin Bs

Sleep is also aided by Omega-3

 Download the PDF from Sci-Hub via VitaminDWiki

OBJECTIVE: The present cross-sectional study investigated the relationship between serum 25-hydroxyvitamin D3 (25[OH]D3) levels and the presence of poor sleep quality in a community-based Japanese adult population.

Poor sleep quality, defined as poor subjective sleep quality and/or use of sleep medications, was assessed using a self-administered questionnaire. The prevalence of poor sleep quality was compared among 512 Japanese participants aged 35-79 years, based on serum 25(OH)D3 levels, which were determined using tandem mass spectrometry. A logistic regression model was used to calculate the odds ratios (ORs) for the presence of poor sleep quality in each group with the highest quartile of 25(OH)D3 serving as the reference group.

Poor sleep quality was reported by 33.2% of the total study population. The prevalence of poor sleep quality was higher in the first quartile group (25[OH]D3: 2.08-18.13 ng/mL) than in the second, third and fourth quartile groups (18.14-23.07 ng/mL, 23.08-28.32 ng/mL, and 28.33-78.83 ng/mL, respectively). The ORs for poor sleep quality were 1.86 (95% confidence interval, 1.08-3.20) for the first quartile group, 0.73 (0.41-1.29) for the second quartile group, and 0.73 (0.42-1.27) for the third quartile group after adjusting for age, sex, and sociodemographic, lifestyle, physical and environmental factors, while the ORs were 1.68 (0.96-2.95), 0.69 (0.39-1.24), and 0.65 (0.37-1.15) after further adjustment for overall health status and depression status.

CONCLUSIONS: The first quartile group of serum 25(OH)D3 was associated with the presence of poor sleep quality.

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Attached files

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11773 Sleep quality 20 ng.jpg admin 15 Apr, 2019 50.75 Kb 626
11772 10.1016@j.sleep.2019.01.046.pdf admin 15 Apr, 2019 525.01 Kb 600