Browsing by Author "Rojas, Juan"
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Item Cesarean rates in a Chilean public hospital and the use of a new prioritization criteria: The relevance index(2019) Yamamoto, Masami; Latorre, Rodrigo; Rojas, Juan; Walker, Bernardita; Jordán, Felipe; Carrillo, Jorge; Paiva, Enrique; Insunza, AlvaroAim:Cesarean section rates are increasing worldwide and Robson’s classification system allows a practicalapproach to study this phenomenon. C-section in Chile has been indicated as unexpectedly high, withimportant variability within the country and payment systems. The aim was to report our data using Rob-son’s system and the evolution of local C-section rate in a public hospital during a 9-year period.Methods:Retrospective analysis (2005–April 2014), in a metropolitan hospital in Santiago. All deliverieswere classified into Robson groups. Time changes were analyzed with Pearson’s correlation.Pvalue <0.05was considered significant. A‘relevance index’(RI) for each group was calculated as 100×C-S rate×rela-tive contribution.Results:The overall C-section rate increased from 24 to 27% (P< 0.05) in 53 571 deliveries, with a greaterincrease in groups 1 (nulliparous, single, term cephalic, spontaneous labor), 3 (multiparous, single, no previ-ous C-S, term cephalic, spontaneous labor) and 4 (multiparous, single, no previous C-S, term cephalic,induced or no labor). Despite no increase in Group 5 (women with one or more previous C-S) this grouphad the highest RI (20.3), which defined priority for intervention over others.Conclusion:C-S rate was lower than that reported in other centers from Chile and Latin America. Robson’sclassification and the RI allowed prioritization. Although increase in groups 1, 3 and 4, group 5 needs atten-tion because of stronger impact on overall C-S rate. This analysis allowed to define how to lower C-S rate inour institutionItem Comparison of Muscular Power Between Dominant and Nondominant Legs in Healthy Young Adults Associated With Single-Leg-Dominant Sports(2017) Vaisman, Alex; Guiloff, Rodrigo; Rojas, Juan; Delgado, Iris; Figueroa, David; Calvo, RafaelBackground: Achieving a symmetrical power performance (difference <15%) between lower limbs is generally recommended during sports rehabilitation. However, athletes in single-leg-dominant sports, such as professional soccer players, could develop significant asymmetry between their dominant and nondominant legs, such that symmetry does not act as a viable comparison. Purpose: To (1) compare maximal muscular power between the dominant and nondominant legs in healthy young adults, (2) evaluate the effect of a single-leg-dominant sport activity performed at the professional level, and (3) propose a parameter of normality for maximal power difference in the lower limbs of this young adult population. Study Design: Controlled laboratory study. Methods: A total of 78 healthy, male, young adults were divided into 2 groups according to sport activity level. Group 1 consisted of 51 nonathletes (mean ± SD age, 20.8 ± 1.5 ears; weight, 71.9 ± 10.5 kg) who participated in less than 8 hours a week of recreational physical activity with nonspecific training; group 2 consisted of 27 single-leg-dominant professional soccer players (age, 18.4 ± 0.6 years; weight, 70.1 ± 7.5 kg) who specifically trained and competed at their particular activity 8 hours or more a week. For assessment of maximal leg power, both groups completed the single-leg squat jump test. Dominance was determined when participants completed 2 of 3 specific tests with the same extremity. Statistical analysis included the Student t test. Results: No statistical difference was found for maximal power between dominant and nondominant legs for nonathletes (t ¼ –1.01, P ¼ .316) or single-leg-dominant professional soccer players (t ¼ –1.10, P ¼ .281). A majority (95%) of participants studied showed a power difference of less than 15% between their lower extremities. Conclusion: Among young healthy adults, symmetrical power performance is expected between lower extremities independent of the existence of dominance and difference in sport activity level. A less than 15% difference in power seems to be a proper parameter to define symmetrical power performance assessed by vertical single-leg jump tests.Publication Core data set para la generación de datos de la vida real en esclerosis múltiple: adaptación de una iniciativa global para América Latina(2024) Rojas, Juan; Gracia, Fernando; Parciak, Tina; Alonso, Ricardo; Becker, Jefferson; Treviño, Irene; Alonso, Marina; Giunta, Diego; Abad, Patricio; Carnero, Edgar; Carrá, Adriana; Correa, Edgar; Correale, Jorge; Cristiano, Edgardo; Flores, José; Fruns, Manuel; Galleguillos, Lorna; Garcea, Orlando; Hamuy, Fernando; Lana, Marco; Navas, Carlos; Pappais, Regina; Patrucco, Liliana; Rivera, Víctor; Tenembaum, Silvia; Ysrraelit, María; Peeters, LiesbetIntroduction: The primary objective of the core data set is to reduce heterogeneity and promote harmonization among data sources in EM, thereby reducing the time needed to execute real life data collection efforts. Recently, a group led by the Multiple Sclerosis Data Alliance has developed a core data set for collecting real-world data on multiple sclerosis (MS) globally. Our objective was to adapt this global data set to the needs of Latin America, so that it can be implemented by the registries already developed and in the process of development in the region. Material and methods: A working group was formed regionally, the core data set created globally was adapted (translation process into Spanish, incorporation of regional variables and consensus on variables to be used). Consensus was obtained through the remote Delphi methodology of a round of questionnaires and remote discussion of the core data set variables. Results: A total of 25 professionals from Latin America carried out the adaptation process between November 2022 and July 2023. Agreement was established on a core data set of nine categories and 45 variables, version 2023 to suggest its implementation in developed or developing registries, and MS cohorts in the region. Conclusion: The core data set seeks to harmonize the variables collected by registries and cohorts in MS in Latin America in order to facilitate said collection and allow collaboration between sources. Its implementation will facilitate real life data collection and collaboration in the region.