Nuestros investigadores

Ismael Alvarez Alvarez

Publicaciones científicas más recientes (desde 2010)

Autores: Alvarez, Ismael; Zazpe I; Pérez de Rojas, J.; et al.
ISSN 0091-7435  Vol. 106  2018  págs. 45 - 52
The health benefits of the Mediterranean diet (MedDiet) and of physical activity (PA) have been widely documented. However, no longitudinal studies have investigated their combined effect on mortality. We assessed the individual and combined effects of adherence to the MedDiet and PA on all-cause mortality. We used data from 19,467 participants from a prospective cohort of Spanish university graduates, the SUN cohort, followed-up between December 1999 and February 2016. Adherence to the MedDiet was assessed using four different dietary scores, categorizing the quantitative scores into tertiles of adherence. To assess multiple dimensions of PA, an 8-item score was built. Multivariable Cox regression models were used to study the individual and combined relationship of adherence to the MedDiet and PA with all-cause mortality. During a median follow-up of 10.3 years, we registered 305 deaths. Compared with the lowest adherence to the MedDiet (< 20 in the modified Mediterranean diet score), better adherence (23¿30 points) was associated with lower mortality (multivariable-adjusted hazard ratio [HR] = 0.66, 95% confidence interval [CI]: 0.46¿0.96). Engaging in moderate or high levels of PA (versus lower levels) was associated with 44% and 52% relative reductions in mortality, respectively. High adherence to the MedDiet combined with engaging in higher amounts of PA showed a HR = 0.36 (95% CI: 0.19¿0.67). We documented that the combined effect of better adherence to the MedDiet and increased PA had multiplicative effects on mortality risk reduction.
Autores: Alvarez, Ismael; de Rojas, J. P.; Fernández-Montero, Alejandro; et al.
ISSN 2047-4873  Vol. 25  Nº 11  2018  págs. 1186 - 1197
Background Inverse associations of the Mediterranean diet (MedDiet) and physical activity with cardiovascular disease have been previously reported. We investigated the individual and combined contributions of both to this inverse association in a Mediterranean cohort. Design We used data from 19,536 participants from a prospective cohort of Spanish university graduates, the 'Seguimiento Universidad de Navarra' (SUN) cohort, followed up between December 1999 and December 2016. Methods Adherence to the MedDiet was obtained from a 136-item validated food-frequency questionnaire and categorized in tertiles using four previously reported dietary scores. A validated questionnaire assessed the physical activity levels according to volume, intensity and frequency. Results Participants were followed up during a median time of 10.4 years. Compared with the lowest category of adherence to the MedDiet (¿3 in the Mediterranean Diet Score), higher adherence (6-9 points) was strongly inversely associated with cardiovascular disease (multivariable adjusted hazard ratio¿=¿0.33; 95% confidence interval (CI) 0.20-0.55). Also, engaging in an active lifestyle (6-8 points in an eight-item score) compared with low activity (<2 points) was associated with a reduced risk of incident cardiovascular disease (hazard ratio¿=¿0.43; 95% CI 0.20-0.90). Greater adherence to the MedDiet and engaging in high levels of active lifestyle showed a 75% relatively reduced risk of cardiovascular disease (hazard ratio¿=¿0.25; 95% CI 0.13-0.48). Conclusions The combined effect of adherence to the MedDiet and adopting an active lifestyle showed a synergistic inverse association with cardiovascular disease risk.
Autores: Rico-Campa, A. ; Alvarez, Ismael; Mendonca, R. D.; et al.
ISSN 0014-2972  Vol. 48  Nº Supl.1  2018  págs. 183
Autores: Alvarez, Ismael; Zazpe I; de Rojas, J. P.; et al.
ISSN 0014-2972  Vol. 48  Nº Supl 1  2018  págs. 170
Autores: Niu, H. , (Autor de correspondencia); Alvarez, Ismael; Guillén-Grima, F; et al.
ISSN 0213-4853  Vol. 32  Nº 8  2017  págs. 523 - 532
Background: A disease of unknown aetiology, Alzheimer's disease (AD) is the most common type of dementia. As the elderly population grows worldwide, the number of patients with AD also increases rapidly. The aim of this meta-analysis is to evaluate the prevalence and incidence of AD in Europe. Methodology: We conducted a literature search on Medline, Scopus, and CINAHL Complete using the keywords Alzheimer, Alzheimer's disease, and AD combined with prevalence, incidence, and epidemiology. A Bayesian random effects model with 95% credible intervals was used. The 12 statistic was applied to assess heterogeneity. Results: The prevalence of Alzheimer's disease in Europe was estimated at 5.05% (95% CI, 4.73-5.39). The prevalence in men was 3.31% (95% CI, 2.85-3.80) and in women, 7.13% (95% CI, 6.56-7.72), and increased with age. The incidence of Alzheimer's disease in Europe was 11.08 per 1000 person-years (95% CI, 10.30-11.89). Broken down by sex, it was 7.02 per 1000 person-years (95% CI, 6.06-8.05) in men and 13.25 per 1000 person-years (95% CI, 12.05-14.51) in women; again these rates increased with age. Conclusions: The results of our meta-analysis allow a better grasp of the impact of this disease in Europe. (C) 2016 Sociedad Espanola de Neurologia. Published by Elsevier Espana, S.L.U.