Listar por tema "Case-Control Studies"

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  • The Association Between Neurocysticercosis and Hippocampal Atrophy is Related to Age 
    Del Brutto, Oscar H.; Issa, Naoum P.; Salgado, Perla; Del Brutto, Victor J.; Zambrano, Mauricio; Lama, Julio; García Lescano, Héctor Hugo (American Society of Tropical Medicine and Hygiene, 2017)
    Neurocysticercosis (NCC) has been associated with hippocampal atrophy, but the prevalence and pathogenic mechanisms implicated in this relationship are unknown. Using a population-based, case-control study design, residents ...
  • Association between serum concentrations of hypoxia inducible factor responsive proteins and excessive erythrocytosis in high altitude Peru 
    Painschab, M.S.; Malpartida, G.E.; Dávila-Roman, V.G.; Gilman, Robert Hugh; Kolb, T.M.; León-Velarde, Fabiola; Miranda, J. Jaime; Checkley, W. (Mary Ann Liebert, 2015)
    Long-term residence at high altitude is associated with the development of chronic mountain sickness (CMS), which is characterized by excessive erythrocytosis (EE). EE occurs under chronic hypoxia, and a strongly selected ...
  • Biomarkers of fluoride in children exposed to different sources of systemic fluoride 
    Buzalaf, M.A.R.; Rodrigues, M.H.C.; Pessan, J.P.; Leite, A.L.; Arana, A.; Villena, R.S.; Forte, F.D.S.; Sampaio, F.C. (SAGE Publications, 2011)
    There has been no comparison between fluoride concentrations in urine and nails of children exposed to different sources of systemic fluoride. The aim of this study was to compare the relationship between fluoride intake ...
  • Bus stops and pedestrian-motor vehicle collisions in Lima, Peru: a matched case-control study 
    Quistberg, D. Alex; Koepsell, Thomas D.; Johnston, Brian D.; Boyle, Linda Ng; Miranda, J. Jaime; Ebel, Beth E. (BMJ Publishing Group, 2013)
    OBJECTIVE: To evaluate the relationship between bus stop characteristics and pedestrian-motor vehicle collisions. METHODS: This was a matched case-control study where the units of study were pedestrian crossings in Lima, ...
  • Calling in sick: impacts of fever on intra-urban human mobility 
    Perkins, T. Alex; Paz-Soldan Parlette, Valerie Andrea; Stoddard, Steven-T.; Morrison, Amy-C.; Forshey, Brett-M.; Long, Kanya-C.; Halsey, Eric-S.; Kochel, Tadeusz-J.; Elder, John-P.; Kitron, Uriel; Scott, Thomas-W.; Vazquez-Prokopec, Gonzalo-M. (Royal Society Publishing, 2016)
    Pathogens inflict a wide variety of disease manifestations on their hosts, yet the impacts of disease on the behaviour of infected hosts are rarely studied empirically and are seldom accounted for in mathematical models ...
  • Can a simple test of functional capacity add to the clinical assessment of diabetes? 
    Stewart, T.; Caffrey, D. G.; Gilman, Robert Hugh; Mathai, S. C.; Lerner, A.; Hernandez, A.; Pinto, M. E.; Huaylinos, Y.; Cabrera, L.; Wise, R. A.; Miranda, J. Jaime; Checkley, W. (Wiley, 2015)
    AIM: To identify impairment in functional capacity associated with complicated and non-complicated diabetes using the 6-min walk distance test. METHODS: We enrolled 111 adults, aged >/=40 years, with Type 2 diabetes from ...
  • Characteristics of rural leptospirosis patients admitted to referral hospitals during the 2008 leptospirosis outbreak in Sri Lanka: implications for developing public health control measures 
    Agampodi, Suneth B.; Nugegoda, Dhanaseela B.; Thevanesam, Vasanthi; Vinetz, Joseph Michael (American Society of Tropical Medicine and Hygiene, 2015)
    To determine the exposure risk factors of highly endemic rural leptospirosis in tropical setting, we conducted a prospective, hospital-based case control study in Sri Lanka. A conceptual hierarchy of variables was used to ...
  • Chronic exposure to biomass fuel smoke and markers of endothelial inflammation 
    Caravedo, M. A.; Herrera, P. M.; Mongilardi, N.; de Ferrari, A.; Davila-Roman, V. G.; Gilman, Robert Hugh; Wise, R. A.; Miele, C. H.; Miranda, J. Jaime; Checkley, W. (Wiley, 2015)
    Indoor smoke exposure may affect cardiovascular disease (CVD) risk via lung-mediated inflammation, oxidative stress, and endothelial inflammation. We sought to explore the association between indoor smoke exposure from ...
  • Cognitive changes and quality of life in neurocysticercosis: A longitudinal study 
    Wallin, M.T.; Pretell, E.J.; Bustos Palomino, Javier Arturo; Caballero, M.; Alfaro, M.; Kane, R.; Wilken, J.; Sullivan, C.; Fratto, T.; García Lescano, Héctor Hugo (Public Library of Science, 2012)
    Background: Few studies have focused on the cognitive morbidity of neurocysticercosis (NCC), one of the most common parasitic infections of the central nervous system. We longitudinally assessed the cognitive status and ...
  • Cytokines and t-lymphocyte count in patients in the acute and chronic phases of bartonella bacilliformis infection in an endemic area in Peru: A pilot study 
    Huarcaya, E.; Best, I.; Rodriguez-Tafur, J.; Maguiña Vargas, Ciro; Solórzano, N.; Menacho, J.; Lopez de Guimaraes, D.; Chauca, J.; Ventosilla, P. (Instituto de Medicina Tropical de São Paulo, 2011)
    Human Bartonellosis has an acute phase characterized by fever and hemolytic anemia, and a chronic phase with bacillary angiomatosis-like lesions. This cross-sectional pilot study evaluated the immunology patterns using ...
  • Decreased plasma soluble erythropoietin receptor in high-altitude excessive erythrocytosis and Chronic Mountain Sickness 
    Villafuerte, Francisco C.; Macarlupú, José Luis; Anza-Ramírez, Cecilia; Corrales-Melgar, Daniela; Vizcardo-Galindo, Gustavo; Corante, Noemí; León-Velarde, Fabiola (American Physiological Society, 2014)
    Excessive erythrocytosis (EE) is the hallmark of chronic mountain sickness (CMS), a prevalent syndrome in high-altitude Andean populations. Although hypoxemia represents its underlying stimulus, why some individuals develop ...
  • Detecting Mutations in the Mycobacterium tuberculosis Pyrazinamidase Gene pncA to Improve Infection Control and Decrease Drug Resistance Rates in Human Immunodeficiency Virus Coinfection 
    Dudley, Matthew Z.; Sheen Cortavarria, Patricia; Gilman, Robert Hugh; Ticona, Eduardo; Friedland, Jon S.; Kirwan, Daniela E.; Caviedes, Luz; Rodriguez, Richard; Cabrera, Lilia Z.; Coronel, Jorge; Grandjean, Louis; Moore, David Alexander James; Evans, Carlton Anthony William; Huaroto, Luz; Chavez-Perez, Victor; Zimic-Peralta, Mirko Juan (American Society of Tropical Medicine and Hygiene, 2016)
    Hospital infection control measures are crucial to tuberculosis (TB) control strategies within settings caring for human immunodeficiency virus (HIV)–positive patients, as these patients are at heightened risk of developing ...
  • Diarrheagenic Escherichia coli phylogroups are associated with antibiotic resistance and duration of diarrheal episode 
    Mosquito, Susan; Pons, Maria J.; Riveros Ramirez, Maribel Denise; Ruiz, Joaquim; Ochoa Woodell, Theresa Jean (Hindawi, 2015)
    Conventionally, in Escherichia coli, phylogenetic groups A and B1 are associated with commensal strains while B2 and D are associated with extraintestinal strains. The aim of this study was to evaluate diarrheagenic (DEC) ...
  • Effect of salt substitution on community-wide blood pressure and hypertension incidence 
    Bernabé Ortiz, Antonio; Sal Y Rosas, Víctor G.; Ponce-Lucero, Vilarmina; Cárdenas García-Santillán, María Kathia; Carrillo Larco, Rodrigo Martín; Diez-Canseco Montero, Francisco; Pesantes Villa, María Amalia; Sacksteder, Katherine A.; Gilman, Robert Hugh; Miranda, J. Jaime (Springer Nature, 2020)
    Replacement of regular salt with potassium-enriched substitutes reduces blood pressure in controlled situations, mainly among people with hypertension. We report on a population-wide implementation of this strategy in a ...
  • Epidemiology and Genetic Characterization of Noroviruses among Adults in an Endemic Setting, Peruvian Amazon Basin, 2004-2011 
    Ballard, Sarah-Blythe; Reaves, Erik J.; Luna, C. Giannina; Silva, Maria E.; Rocha, Claudio; Heitzinger, Kristen; Saito, Mayuko; Apaza, Sonia; Espetia, Susan; Blazes, David L.; Tilley, Drake H.; Guzman Aguilar, Rene C.; Gilman, Robert Hugh; Bausch, Daniel G. (Public Library of Science, 2015)
    BACKGROUND: Successful vaccination strategies against norovirus will require understanding the burden of disease and relevant genotypes in populations. However, few data are available from cohort studies of adults living ...
  • Etiological Role and Repeated Infections of Sapovirus among Children Aged Less than 2 Years in a Cohort Study in a Peri-urban Community of Peru 
    Liu, Xiaofang; Jahuira, Helena; Gilman, Robert Hugh; Alva, Alicia; Cabrera, Lilia; Okamoto, Michiko; Xu, Hang; Windle, Henry J.; Kelleher, Dermot; Varela, Marco; Verastegui Pimentel, Manuela Renee; Calderón Sánchez, Maritza Mercedes; Sanchez, Gerardo; Sarabia, Vanessa; Ballard, Sarah B.; Bern, Caryn; Mayta, Holger; Crabtree, Jean E.; Cama, Vitaliano; Saito, Mayuko; Oshitani, Hitoshi (American Society for Microbiology, 2016)
    Human sapovirus has been shown to be one of the most important etiologies in pediatric patients with acute diarrhea. However, very limited data are available about the causative roles and epidemiology of sapovirus in ...
  • Factores asociados a complicaciones prequirúrgicas en pacientes con equinococosis quística de áreas endémicas del Perú 
    Pacífico, J.; Cabrera, Rufino; Salgado-Díaz, S.; Mormontoy, W.; Suárez-Ognio, L. (Instituto Nacional de Salud, 2021)
    OBJECTIVE: To identify risk factors to pre-surgical complications in patients with cystic echinococcosis (CE) in endemic areas of Peru. MATERIALS AND METHODS: Study of cases (n=43) and controls (n=127) not paired was ...
  • Gender-dependent differences in plasma matrix metalloproteinase-8 elevated in pulmonary tuberculosis 
    Sathyamoorthy, T.; Sandhu, G.; Tezera, L.B.; Thomas, R.; Singhania, A.; Woelk, C.H.; Dimitrov, B.D.; Agranoff, D.; Evans, Carlton Anthony William; Friedland, J.S.; Elkington, P.T. (Public Library of Science, 2015)
    Tuberculosis (TB) remains a global health pandemic and greater understanding of underlying pathogenesis is required to develop novel therapeutic and diagnostic approaches. Matrix metalloproteinases (MMPs) are emerging as ...
  • Global and regional effects of potentially modifiable risk factors associated with acute stroke in 32 countries (INTERSTROKE): a case-control study 
    O'Donnell, Martin-J.; Chin, Siu-Lim; Rangarajan, Sumathy; Xavier, Denis; Liu, Lisheng; Zhang, Hongye; Rao-Melacini, Purnima; Zhang, Xiaohe; Pais, Prem; Agapay, Steven; Lopez-Jaramillo, Patricio; Damasceno, Albertino; Langhorne, Peter; McQueen, Matthew-J.; Rosengren, Annika; Dehghan, Mahshid; Hankey, Graeme-J.; Dans, Antonio-L.; Elsayed, Ahmed; Avezum, Alvaro; Mondo, Charles; Diener, Hans-Christoph; Ryglewicz, Danuta; Czlonkowska, Anna; Pogosova, Nana; Weimar, Christian; Iqbal, Romaina; Diaz, Rafael; Yusoff, Khalid; Yusufali, Afzalhussein; Oguz, Aytekin; Wang, Xingyu; Penaherrera, Ernesto; Lanas, Fernando; Ogah, Okechukwu-S.; Ogunniyi, Adesola; Iversen, Helle-K.; Málaga Rodríguez, Germán Javier; Rumboldt, Zvonko; Oveisgharan, Shahram; Al-Hussain, Fawaz; Magazi, Daliwonga; Nilanont, Yongchai; Ferguson, John; Pare, Guillaume; Yusuf, Salim (Elsevier, 2016)
    BACKGROUND: Stroke is a leading cause of death and disability, especially in low-income and middle-income countries. We sought to quantify the importance of potentially modifiable risk factors for stroke in different regions ...
  • High Prevalence of Asymptomatic Neurocysticercosis in an Endemic Rural Community in Peru 
    Debacq, Gabrielle; Moyano, Luz M.; García Lescano, Héctor Hugo; Boumediene, Farid; Marin, Benoit; Ngoungou, Edgard B.; Preux, Pierre-Marie (Public Library of Science, 2017)
    BACKGROUND: We reviewed studies that analyzed cysticercosis (CC), neurocysticercosis (NCC) and epilepsy across Latin America, Asia and Sub-Saharan Africa, to estimate the odds ratio and etiologic fraction of epilepsy due ...

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