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Insomnia treatment 12X less likely to be effective if low vitamin D – Oct 2017

Low serum 25-hydroxyvitamin D concentrations in chronic insomnia patients and the association with poor treatment outcome at 2months.

Clin Chim Acta. 2017 Oct 25. pii: S0009-8981(17)30420-5. doi: 10.1016/j.cca.2017.10.024. [Epub ahead of print]
Zhao K1, Luan X1, Liu Y1, Tu X1, Chen H1, Shen H1, Qiu H1, Zhu Z1, He J2.
1 Dept of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China.
2 Dept of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China.hjc at wmu.edu.cn.

PDF is available free at Sci-Hub   10.1016/j.cca.2017.10.024

BACKGROUND:
The association between low 25-hydroxyvitamin D [25(OH)D] and sleep disorder has been reported. We investigated whether serum concentrations of 25(OH)D are altered in chronic insomnia patients. The relationship between serum concentrations of 25(OH)D and the treatment outcome in patients at 2months was also investigated.

METHODS:
In total, 181 chronic insomnia patients were consecutively recruited. All patients received pharmacotherapy for the treatment of chronic insomnia. Serum 25(OH)D concentrations were quantified by a competitive electrochemiluminescence protein binding assay. Treatment outcomes were defined as "response" versus "non-response", according to the change of the Pittsburgh Sleep Quality Index (PSQI). We also recruited 100 healthy subjects as a control group.

RESULTS:
Fifty-four out of 181 (29.8%) patients met the criteria for non-response. Chronic insomnia patients had significantly lower 25(OH)D concentrations compared with healthy controls (23.01±9.18 vs 27.17±6.41ng/ml, P<0.001). Non-response patients also had significantly lower 25(OH)D concentrations than those with response. Vitamin D deficiency(25(OH)D concentrations<20ng/ml) was independently associated with a higher probability of treatment non-response at 2 months (odds ratio 11.636, 95% confidence interval 3.966-34.142, P<0.001).

CONCLUSIONS:
Measurement of serum 25(OH)D concentrations are probably useful for judging treatment outcomes of pharmacotherapy in chronic insomnia patients.

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