Abstract | OBJECTIVE: METHODS: This is a secondary investigation related to a previously published observational study about the effect of short-term CPAP therapy on serum vitamin D levels in severe OSAS ( Apnea-Hypopnea Index - AHI- >30/h) patients. In the present study, we included patients participating to the previous investigation who repeated serum vitamin D assessment after one year of useful CPAP treatment, and compared to control a group of OSAS patients with scarce compliance to CPAP treatment. OSAS patients with beneficial use of CPAP treatment were distributed in obese (Body Mass Index - BMI ≥30) and non-obese (BMI < 30). Moreover, the mean change between baseline and one-year follow-up (Δ) of serum vitamin D levels was correlated with demographic, polygraphic and clinical data throughout a multiple regression analysis. RESULTS: We documented the significant increase of serum vitamin D levels after one year of CPAP treatment in the OSAS group (n = 39, p < 0.001) and in both subgroups of obese (n = 23, p < 0.01) and non-obese (n = 16, p < 0.01) OSAS patients. Conversely, OSAS patients with a scarce compliance to CPAP therapy did not change serum vitamin D levels after one year (n = 10, p > 0.05). OSAS patients with beneficial CPAP treatment showed higher vitamin D serum levels after one year and a more frequent shift from insufficient to sufficient vitamin D status compared to OSAS patients not adequately using CPAP treatment. In particular, the obese OSAS patients subgroup shifted from insufficient (≤20 ng/mL) to sufficient (>20 ng/mL) vitamin D status after CPAP therapy more than the non-obese OSAS patients subgroup (p < 0.05). We observed higher Δ of vitamin D serum levels, Epworth Sleepiness Scale score, and AHI in obese compared to non-obese OSAS patients. Finally, BMI obtained at baseline positively correlated with Δ of vitamin D serum levels. DISCUSSION: This study documented that long-term CPAP treatment is a viable therapeutic choice for correcting both sleep apnea condition and vitamin D deficiency in middle-aged male OSAS patients. Significantly, this effect was more evident in obese subjects and possibly represents a valid therapeutic strategy to ensure sufficient vitamin D levels in these patients, which frequently show a deficient vitamin D status.
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Authors | Claudio Liguori, Francesca Izzi, Nicola Biagio Mercuri, Andrea Romigi, Alberto Cordella, Umberto Tarantino, Fabio Placidi |
Journal | Sleep medicine
(Sleep Med)
Vol. 29
Pg. 81-85
(01 2017)
ISSN: 1878-5506 [Electronic] Netherlands |
PMID | 27964863
(Publication Type: Journal Article)
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Copyright | Copyright © 2016 Elsevier B.V. All rights reserved. |
Chemical References |
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Topics |
- Continuous Positive Airway Pressure
(methods)
- Humans
- Long-Term Care
- Male
- Middle Aged
- Obesity
(complications)
- Patient Compliance
- Polysomnography
- Sleep Apnea Syndromes
(complications, therapy)
- Surveys and Questionnaires
- Vitamin D
(blood)
- Vitamin D Deficiency
(blood)
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