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Dive into the research topics where José Ignacio Valenzuela is active.

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Featured researches published by José Ignacio Valenzuela.


Journal of Telemedicine and Telecare | 2011

A telephone survey of patient satisfaction with realtime telemedicine in a rural community in Colombia

Catalina López; José Ignacio Valenzuela; Jorge Enrique Calderón; Andrés Fabián Velasco; Roosevelt Fajardo

We conducted a telephone survey of all patients referred to a realtime telemedicine consultation at the Centre for Telehealth in Bogotá. Over a six-month period, 281 teleconsultations were conducted, and we were able to retrieve telephone numbers for 156 patients. Of these, 121 patients (78%) agreed to answer the questionnaire. Eighty percent of the respondents were satisfied or very satisfied with the teleconsultation and 63% would use telemedicine again. Sixty-five percent thought that telemedicine improved their medical care. More than 50% believed that telemedicine had a positive effect in terms of medical care improvement, time- and cost-savings. Twenty-seven percent felt that teleconsultation was not as good as a traditional face-to-face consultation. Lack of familiarity with ICT did not appear to act as a major barrier to telemedicine, and cognitive factors may be more important in acceptability to patients and their satisfaction. The results of the present study may also be relevant to the poorest countries of the world, where two-thirds of the population live in rural areas.


Suicide and Life Threatening Behavior | 2009

Prevalence of Suicide Risk Factors and Suicide-Related Outcomes in the National Mental Health Study, Colombia.

José Posada-Villa; Juan Camilo Camacho; José Ignacio Valenzuela; Arturo Arguello; Juan Gabriel Cendales; Roosevelt Fajardo

A community survey in 4,426 adults was undertaken as part of the World Mental Health Survey Initiative reporting the prevalence and risk factors for suicide-related outcomes in Colombia. Lifetime prevalence estimates of suicide ideation, plans, attempts, and risk factors for suicide-related outcomes were assessed. Retrospective reports of disorders age-of-onset were used to study associations between primary mental disorders and first onset of suicide-related outcomes. Risks of plans and attempts were highest with ideation early age-of-onset and within the first year. The highest risk for ideation and attempt among ideators occurred in the 18-29 age group. After first employment (defined as the first paid job accepted by the respondent) and presence of mental disorders constituted risk factors. Impulse-control disorders were strongest diagnostic predictors.


Revista Panamericana De Salud Publica-pan American Journal of Public Health | 2009

Percepciones de los trabajadores del sector salud frente a Internet y las tecnologías móviles en Colombia

José Ignacio Valenzuela; Juan Camilo Camacho; Arturo Arguello; Juan Gabriel Cendales; Roosevelt Fajardo

In July 2007 in Medellin, Colombia, 1 200 health care professionals were asked to complete a questionnaire: of the 493 who participated, the mean age was 31.2 years; 58.8% were physicians; and 97.6% had Internet access, 60.5% on a daily basis and 27.7%, weekly. The preferred place to access the Internet was from home (58%) or from the work place (12.5%); 98% reported having a cell phone, and of those, 80% were interested in using health education tools via cell phone. These are the first data published regarding Internet and cellular phone penetration among health care workers in Colombia. Acceptance of the Internet and mobile systems as health information tools is gaining, and as such, creating a new opportunity for training and harnessing of these new technologies.


Jmir mhealth and uhealth | 2014

Sexual and Reproductive Health for Young Adults in Colombia: Teleconsultation Using Mobile Devices

Catalina López; Daniel Ramirez; José Ignacio Valenzuela; Arturo Arguello; Juan Pablo Sáenz; Stephanie Trujillo; Dario Correal; Roosevelt Fajardo; Cristina Dominguez

Background Sexual risk behaviors associated with poor information on sexuality have contributed to major public health problems in the area of sexual and reproductive health in teenagers and young adults in Colombia. Objective To report our experience with the use of DoctorChat Mobile to provide sexual education and information among university students in Bogota, Colombia, and knowledge about the sexual risk factors detected among them. Methods A mobile app that allows patients to ask about sexual and reproductive health issues was developed. Sexual and reproductive risk behaviors in a sample of young adults were measured before and after the use of the app through the validated survey Family Health International (FHI) Behavioral Surveillance Survey (BSS) for Use With Adults Between 15 and 49 Years. A nonprobabilistic convenience recruitment was undertaken through the study´s webpage. After completing the first survey, participants were allowed to download and use the app for a 6-month period (intervention), followed by completion of the same survey once again. For the inferential analysis, data was divided into 3 groups (dichotomous data, discrete quantitative data, and ordinal data) to compare the results of the questions between the first and the second survey. The study was carried out with a sample of university students between 18 and 29 years with access to mobile phones. Participation in the study was voluntary and anonymous. Results A total of 257 subjects met the selection criteria. The preintervention survey was answered by 232 subjects, and 127 of them fully answered the postintervention survey. In total, 54.3% (69/127) of the subjects completed the survey but did not use the app, leaving an effective population of 58 subjects for analysis. Of these subjects, 53% (31/58) were women and 47% (27/58) were men. The mean age was 21 years, ranging between 18 and 29 years. The differences between the answers from both surveys were not statistically significant. The main sexual risk behaviors identified in the population were homosexual intercourse, nonuse of condoms, sexual intercourse with nonregular and commercial partners, the use of psychoactive substances, and lack of knowledge on symptoms of sexually transmitted diseases and HIV transmission. Conclusions Although there were no differences between the pre- and postintervention results, the study revealed different risk behaviors among the participating subjects. These findings highlight the importance of promoting high-impact educational strategies on this matter and the importance of providing teenagers and young adults with easily accessible tools with reliable health information, regardless of their socioeconomic status.


Biomedica | 2011

Cost-effectiveness of laparoscopic versus open cholecystectomy

Roosevelt Fajardo; José Ignacio Valenzuela; Sandra Catalina Olaya; Gustavo A. Quintero; Gabriel Carrasquilla; Carlos Eduardo Pinzón; Catalina López; Juan Camilo Ramírez

INTRODUCTION Cholecystectomy has been the subject of several clinical and cost comparison studies. OBJECTIVE The results of open or laparoscopy cholecystectomy were compared in terms of cost and effectiveness from the perspective of health care institutions and from that of the patients. MATERIALS AND METHODS The cost-effectiveness study was undertaken at two university hospitals in Bogotá, Colombia. The approach was to select the type of cholecystectomy retrospectively and then assess the result prospectively. The cost analysis used the combined approach of micro-costs and daily average cost. Patient resource consumption was gathered from the time of surgery room entry to time of discharge. A sample of 376 patients with cholelithiasis/cystitis (May 2005-June 2006) was selected--156 underwent open cholecystectomy and 220 underwent laparoscopic cholecystectomy. The following data were tabulated: (1) frequency of complications and mortality, post-surgical hospital stay, (2) reincorporation to daily activities, (3) surgery duration, (4) direct medical costs, (5) costs to the patient, and (6) mean and incremental cost-effectiveness ratios. RESULTS Frequency of complications was 13.5% for open cholecystectomy and 6.4% for laparoscopic cholecystectomy (p=0.02); hospital stay was longer in open cholecystectomy than in laparoscopic cholecystectomy (p=0.003) as well as the reincorporation to daily activities reported by the patients (p<0.001). The duration of open cholecystectomy was 22 min longer than laparoscopic cholecystectomy (p<0.001). The average cost of laparoscopic cholecystectomy was lower than open cholecystectomy and laparoscopic cholecystectomy was more cost-effective than open cholecystectomy (US


Journal of Medical Internet Research | 2007

Web-Based Asynchronous Teleconsulting for Consumers in Colombia: A Case Study

José Ignacio Valenzuela; Arturo Arguello; Juan Gabriel Cendales; Carlos Rizo

995 vs. US


Biomedica | 2011

Costo-efectividad de la colecistectomía laparoscópica y de la abierta en una muestra de población colombiana

Roosevelt Fajardo; José Ignacio Valenzuela; Sandra Catalina Olaya; Gustavo A. Quintero; Gabriel Carrasquilla; Carlos Eduardo Pinzón; Catalina López; Juan Camilo Ramírez

1,048, respectively). The patient out-of-pocket expenses were greater in open cholecystectomy compared to laparoscopic cholecystectomy (p=0.015). Mortality was zero. CONCLUSIONS The open laparoscopy procedure was associated with longer hospital stays, where as the cholecystectomy procedure required a longer surgical duration. The direct cost of the latter was lower for both for the health care institution and patients. The cost-effectiveness for both procedures was comparable.


Studies in health technology and informatics | 2010

Web-based asynchronous teleconsulting for consumers in Colombia: a 2-year follow up.

José Ignacio Valenzuela; Catalina López; Yuli Guzmán; Roosevelt Fajardo


Medicina-buenos Aires | 2010

LA EPIDEMIOLOGÍA DEL TRASTORNO DEPRESIVO MAYOR EN EL ESTUDIO NACIONAL DE SALUD MENTAL, COLOMBIA 2003

José Posada Villa; Juan Camilo Camacho; José Ignacio Valenzuela; Arturo Arguello; Juan Gabriel Cendales; Roosevelt Fajardo


Archive | 2010

La Epidemiología del Trastorno Depresivo Mayor en el Estudio Nacional de Salud Mental

José Posada-Villa; Juan Camilo Camacho; José Ignacio Valenzuela; Arturo Arguello; Juan Gabriel Cendales; Roosevelt Fajardo

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Andrés Fabián Velasco

Military University Nueva Granada

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Jorge Enrique Calderón

Military University Nueva Granada

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Carlos Rizo

University Health Network

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