Álvaro J Ruiz

Dr. Álvaro J Ruiz


Research Focus & Metrics

Academic Career Length

30Years (1997-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 2019 in Clinical Nutrition
Verified
Journal Article
Open access
ÁRÁlvaro J Ruiz
Álvaro J Ruiz
GBGiancarlo Buitrago
Giancarlo Buitrago
NRNelcy Rodríguez
Nelcy Rodríguez
GGGabriel Gómez
Gabriel Gómez
SSSuela Sulo
Suela Sulo
CACarolina Araque
Carolina Araque
Hospitalized patients show a high rate of malnutrition, which is associated with poor patient outcomes and high healthcare costs. However, relatively few studies have investigated the association between clinical and economic outcomes and malnutrition in hospitalized patients, particularly those with cardiac and pulmonary conditions. This multicenter prospective observational cohort study included 800 patients hospitalized at four Colombian hospitals with a diagnosis of congestive heart failure, acute myocardial infarction, community-acquired pneumonia, or chronic obstructive pulmonary disease. All patients were screened for malnutrition using the Malnutrition Screening Tool (MST). A descriptive analysis of baseline variables was followed by multivariate analysis and inverse probability weighting (IPW) to compare the clinical outcomes, i.e., length of stay (LOS), mortality, and readmission, and hospital costs associated with a positive MST result. The prevalence of a positive MST result was 24.62% (n = 197) and was more common in patients with older age and greater comorbidities. Multivariate analysis controlling for age, gender, healthcare plan, university degree, hospitalization, entrance disease and Charlson co-morbidity index showed that a positive MST result was associated with increased LOS (1.43 ± 0.61 days) and both in-hospital mortality (odds ratio, 2.39) and global mortality (odds ratio, 2.52). IPW analysis confirmed the association between a positive MST result and increased hospital LOS and 30-day mortality, as well as a relative increase of 30.13% in the average cost associated with hospitalization. This study of hospital inpatients demonstrated a high burden of malnutrition at the time of hospital admission, which negatively impacted LOS and mortality and increased the costs of hospitalization. These findings underscore the need for improved diagnosis and treatment of hospital malnutrition to improve patient outcomes and reduce healthcare costs.

1 June 2012 in Diabetes Technology & Therapeutics
Verified
Journal Article
Closed access
PAPablo J. Aschner
Pablo J. Aschner
ÁRÁlvaro J Ruiz
Álvaro J Ruiz
Although the terms “metabolic memory” and “legacy effect” have been used to describe the prolonged benefits of good blood glucose control, the former is now recognized as a phenomenon related to the prolonged harm produced mainly by hyperglycemia. At least three randomized clinical trials (Diabetes Control and Complications Trial in type 1 diabetes, United Kingdom Prospective Diabetes Study and Steno-2 in type 2 diabetes) have demonstrated that patients treated intensively for a period of time have a lower risk of micro- and macrovascular complications that persists during subsequent follow-up, even after their tight control has relented and the levels of glycated hemoglobin in the conventionally treated group improve. The mechanisms are not fully understood but most probably relate to the physiopathology of vascular complications of diabetes, and in recent years a unifying theory has been emerging to understand them. The excess superoxide anion produced by the mitochondria in response to hyperglycemia leads through disturbances at the nuclear level to the accumulation of potentially harmful substances such as advanced glycated end-products, protein kinase C, and nuclear factor κB, which are directly implicated in the development of vascular complications in diabetes. These adverse effects are not reversed when the high blood glucose is corrected, and some may be permanent because of epigenetic changes. Some antidiabetes drugs and antioxidant substances have produced partial reversibility of the mechanisms involved in the metabolic memory at the experimental level, but probably the best strategy is to optimize the metabolic control as early as possible, even before diabetes is diagnosed.

1 December 2011 in Journal of Hospital Infection
Verified
Journal Article
Closed access
FAFernando A. Angarita
Fernando A. Angarita
SAS.A. Acuna
S.A. Acuna
LTL. Torregrosa
L. Torregrosa
MTM. Tawil
M. Tawil
JEJ. Escallon
J. Escallon
ÁRÁlvaro J Ruiz
Álvaro J Ruiz

1 April 2016 in Sleep Science
Verified
Journal Article
Open access
ÁRÁlvaro J Ruiz
Álvaro J Ruiz
MSMartín Alonso Rondón Sepúlveda
Martín Alonso Rondón Sepúlveda
PMPatricia Hidalgo Martínez
Patricia Hidalgo Martínez
MMMartín Cañón Muñoz
Martín Cañón Muñoz
LMLiliana Otero Mendoza
Liliana Otero Mendoza
JGJuan Camilo Ospina García
Juan Camilo Ospina García
To determine the prevalence of sleep complaints in adults in Colombia at different altitudes. Cross-sectional, population-based and observational study. Urban areas in three cities (Bogotá, Bucaramanga, Santa Marta) located between 15 and 2640 masl. Subjects Over 18 years old. Epworth sleepiness scale (ESS), Pittsburgh sleep quality index (PSQI), Berlin questionnaire, STOP-Bang questionnaire and diagnostic criteria for restless leg syndrome (IRLSSG). The overall prevalence of sleep complaints was 59.6% (CI 95%: 57.3; 61.8%). According to the Pittsburgh scale, 45.3% (CI 95%: 43.0; 47.5) required medical assistance. The Berlin questionnaire indicated that 19.0% (CI 95%: 17.3; 20.8%) had a high risk of sleep apnea (OSA) compared to 26.9% (CI 95%: 24.9; 29.0%) according to STOP-Bang. Among the subjects, 13.7% (CI 95%: 12.3; 15.3%) had excessive daytime sleepiness and 37.7% (CI 95%: 35.5; 39.8%) had a restless leg syndrome. When comparing cities, significant differences in the overall frequency of subjects requiring care were found between Santa Marta (higher frequency) and the other two cities. Differences in sleep problem frequency (Pittsburgh) were observed between Bogota (higher frequency) and Bucaramanga and also between Santa Marta (higher frequency) and the other two cities. The high risk of OSA (STOP-Bang) was different between Bogota (higher frequency) and Bucaramanga and also between Santa Marta (high frequency) and Bucaramanga. We observed a high prevalence of sleep complaints with significant differences among the cities, indicating a need to pay a greater attention to these problems.

8 October 2015 in Food & Function
Verified
Journal Article
Closed access
PDF file
LPLucci Paolo
Lucci Paolo
MBM. Borrero
M. Borrero
ÁRÁlvaro J Ruiz
Álvaro J Ruiz
DPD. Pacetti
D. Pacetti
NFN. G. Frega
N. G. Frega
MAM. Angel
M. Angel
This study examines, for the first time, the effect of hybrid Elaeis oleifera × E. guineensis palm oil supplementation on human plasma lipids related to CVD risk factors. One hundred sixty eligible participants were randomized and assigned to one of the two treatments: 25 mL hybrid palm oil (HPO group) or 25 mL extra virgin olive oil (EVOO group) daily for 3 months. Fasting venous samples were obtained at baseline and after 1, 2 and 3 months for measurement of plasma lipids (TC, LDL-C, HDL-C and TAGs). Changes in body mass index and waist circumference were also assessed. Although there was an overall reduction in TC (7.4%, p < 0.001) and in LDL-C (15.6%, p < 0.001), no significant differences were found between the treatment groups in a repeated measures analysis of variance for TC (p = 0.0525), LDL-C (p = 0.2356), HDL-C (p = 0.8293) or TAGs (p = 0.3749). Furthermore, HPO consumption had similar effects on plasma lipids to EVOO, thus providing additional support for the concept that hybrid Elaeis oleifera × E. guineensis palm oil can be seen as a “tropical equivalent of olive oil”.

3 December 2009 in The Journal of Clinical Hypertension
Verified
Journal Article
Closed access
PAPablo Aschner
Pablo Aschner
ÁRÁlvaro J Ruiz
Álvaro J Ruiz
BBBeverley Balkau
Beverley Balkau
CMChristine Massien
Christine Massien
SHSteven M. Haffner
Steven M. Haffner
OIon behalf of the Latin America and the Caribbean International Day for Evaluation of Abdominal Adiposity (IDEA) National Coordinators and Investigators
on behalf of the Latin America and the Caribbean International Day for Evaluation of Abdominal Adiposity (IDEA) National Coordinators and Investigators