Serum vitamin d levels and their association with the duration of sleep in the elderly: a systemic review
Notice bibliographique
Résumé
The demographic and epidemiological profile has changed due to the decrease in mortality and fertility rates. Due to these events, an increasing number of elderly people are occurring, making it necessary to understand the aging process. As a consequence of aging there may be nutritional changes as the absorption of vitamins and minerals is compromised in the elderly. In the elderly, vitamin D deficiency stands out. Hypovitaminosis D in the elderly has been aggravated by the fact that they have less sun exposure and the low consumption of food sources is also related to the low serum vitamin concentrations. Aging can also affect the sleep duration of the elderly and these changes may be related to vitamin D. Therefore, the aim of this research is to evaluate the association of vitamin D with sleep duration in the elderly. It is a systematic review. Data were collected from December 2018 to March 2019, in the PubMed, Scopus, Scielo and Bireme databases. The following descriptors sleep, which is widely used in the literature and those described in the Medical Subject Headings (Mesh), were used: sleep disorders, sleep quality, vitamin D, cholecalciferol, 25 hydroxyvitamin D, aged, elderly, older with the aid of “AND ”And“ OR. In order to evaluate the methodological quality, the Newcastle Ottawa scale was used. As a result, 5 cross-sectional studies were selected, all from the pubMed database. The year 2018 appears with the largest number of articles published 60% (n = 3) and the country with the largest number of studies was South Korea 60% (n = 3). The studies classified as inadequate vitamin D <20 ng / mL or <50nmol / L and adequate> 20ng / mL and> 50 mmol / L. In order to evaluate sleep duration, the following methods were found, hours of sleep <7 or ≥7 hours, actigraphy and “how many hours of sleep per night?”. Vitamin D inadequacy was prevalent in both of genders, but when men and women were compared, women had lower vitamin D values. Elderly individuals with values below <20 ng / mL had a shorter sleep duration, whereas those values > 20ng / mL showed an improvement in sleep duration. For methodological evaluation the scores ranged from 4 to 7 points. The largest number of studies found are from South Korea, due to its geographical location, its latitude may have an influence on the low levels of vitamin D, since it is important in the formation of vitamin D. Other studies that related latitude with Vitamin D also found similar results a high prevalence of hypovitaminosis D among the elderly. The five studies revealed that there is an association between <7 hours sleep independent of the sleep duration method and vitamin D deficiency in the elderly.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,008 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,004 | 0,004 |
| Bibliométrie | 0,009 | 0,009 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,002 | 0,001 |
| Science ouverte | 0,001 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».