Studies related to Sleep Quality and Vitamin D

The Effect Of Vitamin D Supplement On The Score And Quality Of Sleep In 20-50 Year-old People With Sleep Disorders Compared With Control Group

Effect Increase
Values PSQI score. Mean and SD. Placebo: before 10.51 ± 3.14, after 9.73 ± 3.04. Vitamin D: before 9.45 ± 2.44, after 6.75 ± 2.97. Sleep disturbances: Placebo: before 1.40 ± 0.78, after 1.41 ± 0.65. Vitamin D: before 1.23 ± 0.47, after 1.14 ± 0.46. Subjective score: Placebo: before 1.57 ± 0.62, after 1.46 ± 0.58. Vitamin D: before 1.68 ± 0.77, after 1.18 ± 0.62
Trial Design Randomized trial
Trial Length 1-6 months
Number of Subjects 93
Sex Both Genders
Age Range 18-29, 30-44, 45-64
Notes for this study:
In a randomized, double-blind, placebo-controlled trial, 93 participants with poor sleep quality were allocated to take either 200,000 IU of vitamin D or placebo every two weeks for 8 weeks. The baseline serum 25 (OH)D level was 25.00 ± 8.95 ng/ml in the vitamin D group and 27.60 ± 8.30 in the placebo group. At the end of the study, the vitamin D group saw an increase to 37.69 ± 12.25, while the placebo group didn't see a notable change.

Sleep quality, according to the PSQI was improved more in the vitamin d group, the difference being statistically significant. Sleep duration increased, sleep latency decreased, and sleep deficiency increased more in the vitamin D group than the placebo group, the differences being statistically significant, though adjustment for potential confounding factors resulted in the-value for sleep efficiency being p=0.082. While day time dysfunction decreased in the vitamin D group, the difference wasn't statistically significant.