Vitamin D and sleep in children
J Clin Sleep Med . 2020 Jul 15;16(7):1119-1123. doi: 10.5664/jcsm.8440.
Baha Al-Shawwa 1 2, Zarmina Ehsan 1 2, David G Ingram 1 2
Items in both categories Sleep and Infant-Child are listed here:
- Many sleep problems are associated with low Vitamin D (children in this case) - Jan 2022
- 2.5 X more health compaints in children and youths if low vitamin D – Jan 2021
- Sleepiness in children 1.7X more likely if low vitamin D – Nov 2020
- Children with low Vitamin D slept 1 hour less, had 1 hour later bedtimes – July 2020
- Sleep duration in 2 year olds proportional to Vitamin D levels – Dec 2019
- Children short sleep 12 percent more likely for each 1 ng lower vitamin D at birth – Oct 2018
- Sleep half hour longer if OK level of Vitamin D (2-year olds) – April 2018
Sleep category starts with
A few items in SLEEP category
- Sleep greatly improved by 50,000 IU of vitamin D once every two weeks – RCT Sept 2018
- Sleep disorders nicely treated by Vitamin D (50,000 IU twice a month) – RCT May 2017
- Sleep, Dr. Gominak and Vitamin D - several studies
- Restless Legs Syndrome dramatically reduced by vitamin D, etc
- On the job sleepiness 2.2X more likely if low vitamin D – Feb 2020
- Poor sleep 1.5 X more likely if less than 20 ng of Vitamin D – Feb 2019
- The Better Sleep Vitamin (Vitamin D) – nice 3 dollar book Feb 2015
- The worse the sleep apnea, the lower the vitamin D levels – meta-analysis 2017, 2020
- Vitamin D for better sleep video - Dec 2021
- 5X increase in sleep problems in a decade in US Veterans
- Sleep Apnea and Vitamin D - many studies
- Melatonin and Vitamin D - many studies does much more than improve sleep
Study objectives: The impact of vitamin D on human health including sleep has been well described in adults. Its deficiency has been associated with multiple sleep disorders such as decrease in sleep duration, worsening of sleep quality, and even OSA. Such correlation is less evident in the pediatric population. In the current study, we examined the relationship between sleep architecture and vitamin D status in children referred to a sleep clinic.
Methods: This was a retrospective-cohort study in a tertiary care children's hospital over a 1-year period. Children who underwent an in-laboratory overnight-polysomnogram and had a 25-hydroxy vitamin D level obtained within 120 days of the sleep study were included. Patients with OSA or central sleep apnea were excluded. Data from polysomnograms and Pediatric Sleep Questionnaires were collected and analyzed.
Results: A total of 39 patients (mean age, 6.6 years; 46% female) were included in the study. Twenty (51%) patients had vitamin D deficiency (25-hydroxy vitamin D level < 30 ng/mL). Children with vitamin D deficiency had
- less total sleep time (470.3 minutes ± 35.6 vs 420.3 minutes ± 61.7; P = .004) and
- poorer sleep efficiency (91.9% ± 5.6% vs 84.5% ± 9.5%; P = .015) compared with children with sufficient vitamin D.
In addition, children with vitamin D deficiency had
- later weekday bedtimes (21:02 Pm ± 1:01 vs 20:19 Pm ± 0:55; P = .037) and
- later weekend bedtimes (21:42 Pm ± 0:59 vs 20:47 Pm ± 1:08; P = .016) than children with sufficient vitamin D,
with a tendency for later wake time that did not reach statistical significance.
The remainder of the polysomnogram findings and Pediatric Sleep Questionnaire data were not different between the 2 groups.
Conclusions: Vitamin D deficiency in children was associated with objectively measured decreased sleep duration and poorer sleep efficiency. Furthermore, vitamin D deficiency was associated with delayed bedtimes, suggesting that vitamin D and circadian rhythm could be related. Future prospective studies in children would be helpful to learn if vitamin D deficiency leads to sleep disturbance or vice versa.
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