Momento de inicio del deterioro cognitivo: resultados del estudio de cohortes Whitehall II |
Timing of onset of cognitive decline: results from Whitehall II prospective cohort study Archana Singh-Manoux, Mika Kivimaki, Maria Glymour, Alexis Elbaz, Claudine Berr, Klaus P Ebmeier, Jane E Ferrie, Aline Dugravot. BMJ 2012;344:d7622 doi: 10.1136/bmj.d7622 (Published 5 January 2012) La memoria, el razonamiento y la comprensión podrían comenzar a deteriorarse despues de los de los 45 años de edad, y no luego de los 60 años, como se creía hasta ahora. Esta nueva posibilidad se encontró en un estudio prospectivo de cohortes que incluyó a 5198 hombres y a 2192 mujeres de 45 a 70 años. El estudio, denominado Whitehall II, siguió a funcionarios públicos británicos evaluando tres veces su función cognitiva (memoria, vocabulario, razonamiento, fluencia fonética y fluencia semántica) durante los diez años del estudio el cual se inició en 1997. Al paso del tiempo las puntuaciones de las capacidades evaluadas descendieron, si bien, el declive más rápido se registró entre las personas con edad más avanzada. Entre los hombres de 45 a los 49 años, la capacidad de razonamiento descendió un 3.6%, y entre los de 65 a 70 años, un 9.6%. Entre las mujeres, el descenso fue de 3.6% y 7.4%, respectivamente. http://www.bmj.com/highwire/filestream/555079/field_highwire_article_pdf/0.pdf
|
Efecto de la melatonina, del magnesio y del zinc sobre el insomnio primario en habitantes de larga duración de centros de cuidados en Italia: estudio doble ciego controlado. |
The effect of melatonin, magnesium, and zinc on primary insomnia in long-term care facility residents in Italy: a double-blind, placebo-controlled clinical trial. Rondanelli M, Opizzi A, Monteferrario F, Antoniello N, Manni R, Klersy C. Section of Human Nutrition and Dietetics, Department of Applied Health Sciences, Faculty of Medicine, Azienda di Servizi alla Persona di Pavia, University of Pavia, Pavia, Italy. mariangela.rondanelli@unipv.itJ Am Geriatr Soc. 2011 Jan;59(1):82-90. doi: 10.1111/j.1532-5415.2010.03232.x. Abstract OBJECTIVES: To determine whether nightly administration of melatonin, magnesium, and zinc improves primary insomnia in long-term care facility residents. DESIGN: Double-blind, placebo-controlled clinical trial. SETTING: One long-term care facility in Pavia, Italy. PARTICIPANTS: Forty-three participants with primary insomnia (22 in the supplemented group, 21 in the placebo group) aged 78.3 ± 3.9. INTERVENTION: Participants took a food supplement (5 mg melatonin, 225 mg magnesium, and 11.25 mg zinc, mixed with 100 g of pear pulp) or placebo (100 g pear pulp) every day for 8 weeks, 1 hour before bedtime. MEASUREMENTS: The primary goal was to evaluate sleep quality using the Pittsburgh Sleep Quality Index. The Epworth Sleepiness Scale, the Leeds Sleep Evaluation Questionnaire (LSEQ), the Short Insomnia Questionnaire (SDQ), and a validated quality-of-life instrument (Medical Outcomes Study 36-item Short Form Survey (SF-36)) were administered as secondary end points. Total sleep time was evaluated using a wearable armband-shaped sensor. All measures were performed at baseline and after 60 days. RESULTS: The food supplement resulted in considerably better overall PSQI scores than placebo (difference between groups in change from baseline PSQI score=6.8; 95% confidence interval=5.4-8.3, P<.001). Moreover, the significant improvements in all four domains of the LSEQ (ease of getting to sleep, P<.001; quality of sleep, P<.001; hangover on awakening from sleep, P=.005; alertness and behavioral integrity the following morning, P=.001), in SDQ score (P<.001), in total sleep time (P<.001), and in SF-36 physical score (P=.006) suggest that treatment had a beneficial effect on the restorative value of sleep. CONCLUSION: The administration of nightly melatonin, magnesium, and zinc appears to improve the quality of sleep and the quality of life in long-term care facility residents with primary insomnia. http://onlinelibrary.wiley.com/doi/10.1111/j.1532-5415.2010.03232.x/pdf
|
|
No hay comentarios:
Publicar un comentario