Mortality in very low birth weight (VLBW) infants in South American NEOCOSUR Neonatal Network: timing and causes / Mortalidad en recién nacidos de muy bajo peso al nacer en la Red Neonatal NEOCOSUR: causalidad y temporalidad.

INTRODUCTION: Mortality in very low birth weight infants (VLBWIs) has remained at ~26% in the past 16 years in the NEOCOSUR Neonatal Network. OBJECTIVE: Mortality in very low birth weight infants (VLBWIs) has remained at ~26% in the past 16 years in the NEOCOSUR Neonatal Network. POPULATION AND METHODS: Observational, multicenter cohort study; retrospective analysis of data collected prospectively. Newborn infants born between 24 and 31+6 weeks of gestation age with a birth weight between 500 and 1500 g in the 26 sites of the NEOCOSUR Neonatal Network were included. The causes of death were analyzed depending on whether they occurred in the delivery room (DR) or in the neonatal intensive care unit (NICU). The postnatal age at time of death was determined using the KaplanMeier test. RESULTS: Observational, multicenter cohort study; retrospective analysis of data collected prospectively. Newborn infants born between 24 and 31+6 weeks of gestation age with a birth weight between 500 and 1500 g in the 26 sites of the NEOCOSUR Neonatal Network were included. The causes of death were analyzed depending on whether they occurred in the delivery room (DR) or in the neonatal intensive care unit (NICU). The postnatal age at time of death was determined using the KaplanMeier test. CONCLUSIONS: Important differences were observed in the causes of death of VLBWIs depending on their occurrence in the DR or the NICU. Infectious and respiratory conditions were the most relevant factors following admission to the NICU.

Introducción. La mortalidad de los recién nacidos de muy bajo peso de nacimiento (RNMBPN) se ha mantenido en ~26 % en los últimos 16 años en la Red Neonatal NEOCOSUR. Objetivo. Determinar la causa de muerte de los RNMBPN y su temporalidad en el período 20072016 en la Red Neonatal NEOCOSUR. Población y métodos. Estudio observacional de cohorte multicéntrica; análisis retrospectivo de datos obtenidos prospectivamente. Se incluyeron recién nacidos entre 24 y 31+6 semanas de edad gestacional y peso de nacimiento de 500-1500 g, en 26 centros de la Red Neonatal NEOCOSUR. Las causas de muerte se analizaron según ocurriera en sala de partos (SP) o durante la estadía en la unidad de cuidados intensivos neonatales (UCIN). La edad posnatal de muerte se determinó a través de análisis de Kaplan-Meier. Resultados. Se incluyeron un total de 11753 RNMBPN con una mortalidad global del 25,6 %. Las causas de muerte predominantes en SP fueron malformaciones congénitas (43,3 %), enfermedades respiratorias (14,3 %) y prematuridad (11,4 %). Las causas de muerte predominantes en UCIN fueron las respiratorias (24,2 %) e infecciosas (24,1 %). La edad promedio de muerte fue de 10,2 días y mediana de 4 días. El 10,2 % de las muertes ocurrieron en SP; el 21,5 %, durante el primer día; el 52 % ocurrió en los primeros 4 días y el 63,8 %, durante la primera semana de vida. , A través de los años, la mortalidad de los recién nacidos de muy bajo peso de nacimiento (RNMBPN) se ha mantenido estable, en torno al 26 % en la Red Neonatal NEOCOSUR.1 Esta mortalidad es mayor que la reportada por otras redes neonatales de países desarrollados. Así, los datos de la Red Suiza dan cuenta de una mortalidad de solo un 11 % entre los años 2012 a 2014 para el mismo grupo de recién nacidos.2 La red internacional iNEO, que agrupa 10 redes a lo largo del mundo, describe una mortalidad global del 9,1 % en RNMBPN de entre 24 a 32 semanas de edad gestacional entre los años 2007 y 2015.3 Por otra parte, la Red Neonatal Brasilera informa una mortalidad de 30 % en RNMBPN.4 f. Red Neonatal del Cono Sur (www. neocosur.org). Correspondencia: Alberto Toso: aatoso@ uc.cl Financiamiento: Ninguno. Conflicto de intereses: Ninguno que declarar. Recibido: 12-8-2021 Aceptado: 12-1-2022 Conclusiones. Se encuentran importantes diferencias en las causas de muerte de RNMBPN según ocurra en SP o en UCIN. Las infecciosas y respiratorias son las más relevantes luego del ingreso a la unidad de cuidados intensivos.

Mortalidad en recién nacidos de muy bajo peso al nacer en la Red Neonatal NEOCOSUR: causalidad y temporalidad / Mortality in very low birth weight (VLBW) infants in South American NEOCOSUR Neonatal Network: timing and causes

Introducción. La mortalidad de los recién nacidos de muy bajo peso de nacimiento (RNMBPN) se ha mantenido en ~26 % en los últimos 16 años en la Red Neonatal NEOCOSUR. Objetivo. Determinar la causa de muerte de los RNMBPN y su temporalidad en el período 20072016 en la Red Neonatal NEOCOSUR. Población y métodos. Estudio observacional de cohorte multicéntrica; análisis retrospectivo de datos obtenidos prospectivamente. Se incluyeron recién nacidos entre 24 y 31+6 semanas de edad gestacional y peso de nacimiento de 500-1500 g, en 26 centros de la Red Neonatal NEOCOSUR. Las causas de muerte se analizaron según ocurriera en sala de partos (SP) o durante la estadía en la unidad de cuidados intensivos neonatales (UCIN). La edad posnatal de muerte se determinó a través de análisis de Kaplan-Meier. Resultados. Se incluyeron un total de 11.753 RNMBPN con una mortalidad global del 25,6 %. Las causas de muerte predominantes en SP fueron malformaciones congénitas (43,3 %), enfermedades respiratorias (14,3 %) y prematuridad (11,4 %). Las causas de muerte predominantes en UCIN fueron las respiratorias (24,2 %) e infecciosas (24,1 %). La edad promedio de muerte fue de 10,2 días y mediana de 4 días. El 10,2 % de las muertes ocurrieron en SP; el 21,5 %, durante el primer día; el 52 % ocurrió en los primeros 4 días y el 63,8 %, durante la primera semana de vida. Conclusiones. Se encuentran importantes diferencias en las causas de muerte de RNMBPN según ocurra en SP o en UCIN. Las infecciosas y respiratorias son las más relevantes luego del ingreso a la unidad de cuidados intensivos.

Introduction. Mortality in very low birth weight infants (VLBWIs) has remained at ~26% in the past 16 years in the NEOCOSUR Neonatal Network. Objective. To determine the cause of death of VLBWIs and its temporality in the 2007-2016 period in the NEOCOSUR Neonatal Network. Population and methods. Observational, multicenter cohort study; retrospective analysis of data collected prospectively. Newborn infants born between 24 and 31+6 weeks of gestation age with a birth weight between 500 and 1500 g in the 26 sites of the NEOCOSUR Neonatal Network were included. The causes of death were analyzed depending on whether they occurred in the delivery room (DR) or in the neonatal intensive care unit (NICU). The postnatal age at time of death was determined using the KaplanMeier test. Results. A total of 11 753 VLBWIs were included; overall mortality was 25.6%. The prevailing causes of death in the DR were congenital malformations (43.3%), respiratory diseases (14.3%), and prematurity (11.4%). The prevailing causes of death in the NICU were respiratory diseases (24.2%) and infections (24.1%). The average and median age at death were 10.2 and 4 days, respectively. Also, 10.2% of deaths occurred in the DR; 21.5% on day 1, 52% in the first 4 days, and 63.8% in the first week of life. Conclusions. Important differences were observed in the causes of death of VLBWIs depending on their occurrence in the DR or the NICU. Infectious and respiratory conditions were the most relevant factors following admission to the NICU.

Trends in Perinatal Practices and Neonatal Outcomes of Very Low Birth Weight Infants during a 16-year Period at NEOCOSUR Centers.

OBJECTIVE: To describe trends in mortality, major morbidity, and perinatal care practices of very low birth weight infants born at NEOCOSUR Neonatal Network centers from January 1, 2001, through December 31, 2016. STUDY DESIGN: A retrospective analysis of prospectively collected data from all inborn infants with a birthweight of 500-1500 g and 23-35 weeks of gestation. RESULTS: We examined data for 13 987 very low birth weight infants with a mean birth weight of 1081 ± 281 g and a gestational age of 28.8 ± 2.9 weeks. Overall mortality was 26.8% without significant changes throughout the study period. Decreases in early onset sepsis from 6.3% to 2.8% (P <.001), late onset sepsis from 21.1% to 19.5% (P = .002), retinopathy of prematurity from 21.3% to 13.8% (P <.001), and hydrocephalus from 3.8% to 2.4% (P <.001), were observed. The incidence for bronchopulmonary dysplasia decreased from 17.3% to 16% (P = .043), incidence of severe intraventricular hemorrhage was 10.4%, necrotizing enterocolitis 11.1%, and periventricular leukomalacia 3.8%, and did not change over the study period. Administration of antenatal corticosteroids increased from 70.2% to 82.3% and cesarean delivery from 65.9% to 75.4% (P <.001). The use of conventional mechanical ventilation decreased from 67.7% to 63.9% (P <.001) and continuous positive airway pressure use increased from 41.3% to 64.3% (P <.001). Survival without major morbidity increased from 37.4% to 44.5% over the study period (P <.001). CONCLUSIONS: Progress in perinatal and neonatal care at network centers was associated with an improvement in survival without major morbidity of very low birth weight infants during a 16-year period. However, overall mortality remained unchanged.

[The relation between overweight and obesity in preschool children with socioeconomic level and environment of Chilean districts: An ecological study]. / Relación entre el sobrepeso y la obesidad en menores de seis años y el nivel socioeconómico y las características del entorno en comunas de Chile: estudio ecológico.

OBJECTIVE: To analyze the association between the prevalence of overweight and obesity in children younger than six years of age cared for in the primary healthcare setting with socioeconomic level and environment of Chilean districts. METHODS: We conducted an ecological study to analyze the correlation between the prevalence of overweight and obesity and indicators of socioeconomic status (poverty by income and multidimensional poverty) and district environment and surroundings (green areas and crime reporting rate for crimes of significant social connotation). Furthermore, we performed four simple linear regression models with the correlated variables. RESULTS: At the district level, we found that the percentage of people living in poverty as defined by income, and the rate for reporting of crimes, are significantly correlated with the prevalence of overweight and obesity. The crime reporting rate correlated negatively with prevalence, and no correlation was found with communal green areas. Those districts with greater income poverty and a lower crime reporting rate have a higher prevalence of overweight and obesity in children under six years of age. CONCLUSIONS: The characteristics of the district environment in which children are raised could augment the risk for overweight and obesity, mainly due to socioeconomic level. The crime reporting rate, on the contrary, shows an inverse relationship with these nutritional conditions.

OBJETIVO: Analizar la asociación entre la prevalencia de sobrepeso y obesidad de los niños menores de seis años controlados en la atención primaria de salud, con medidas de nivel socioeconómico y de entorno de las comunas de Chile. MÉTODOS: Estudio ecológico que analiza la correlación entre la prevalencia de sobrepeso y obesidad e indicadores de nivel socioeconómico (pobreza por ingresos y pobreza multidimensional), y de entorno comunal (áreas verdes y tasa de denuncias de delitos de mayor connotación social). Además, se aplican cuatro modelos de regresión lineal simple con las variables correlacionadas. RESULTADOS: A nivel comunal se observa que el porcentaje de personas en condición de pobreza por ingresos y la tasa de denuncias se correlacionan de manera significativa con la prevalencia de obesidad y sobrepeso. La tasa de denuncias se correlaciona de manera negativa con la prevalencia de sobrepeso y obesidad, y no se encuentra correlación con las áreas verdes comunales. Aquellas comunas con mayor pobreza por ingresos y menor tasa de denuncias tienen mayor prevalencia de sobrepeso y obesidad en los menores de seis años. CONCLUSIONES: Las características del entorno comunal en el cual se desarrollan los niños/as podrían aumentar el riesgo de sobrepeso y obesidad, principalmente las características relacionadas con el nivel socioeconómico; las tasas de denuncias muestran en cambio, una relación inversa con estas condiciones nutricionales.

Neonatal outcomes of antenatal corticosteroids in preterm multiple pregnancies compared to singletons.

BACKGROUND: Antenatal corticosteroids (ACS) during preterm labour reduce neonatal mortality and morbidity. Evidence on preterm multiple pregnancies is limited and contradictory. OBJECTIVE: Compare the effect of ACS on very low birth weight infant's (VLBW) mortality and morbidity among singleton and multiple pregnancies. STUDY DESIGN: Retrospective cohort study, employing prospectively collected data, of infants 23 to 34 weeks' gestation and 500 to 1500 g born at the Neocosur Neonatal Network centers during 2007-2016. Neonatal outcomes were compared among singleton and multiple pregnancies exposed to at least one dose of ACS to those not exposed using logistic regression analyses controlled for birthweight, gestational age, sex, small for gestational age (SGA) and mode of delivery. RESULTS: A total of 13,864 infants were studied; 2948 multiple (21.3%) and 10,904 singleton pregnancies (78.7%). Overall, 11,218 (81.4%) received at least one dose of ACS with a significant reduction in the risk of death, RDS and grade III or IV IVH compared to those not exposed. Both singleton and multiple pregnancies exposed to ACS showed similar reduced risk of death (aRR 0.41 [95% CI, 0.36-0.47] vs. aRR 0.46 [95% CI, 0.34-0.64]). However, ACS were not associated with reduced odds of RDS (aRR 0.89 [95% CI, 0.66-1.23]) or grade III or IV IVH (aRR 0.99 [95% CI, 0.67-1.48]) in multiple pregnancies. CONCLUSION: The benefit of administration of at least one dose of ACS in VLBW multiple and singleton pregnancies is comparable in terms of death. However, ACS showed no relevant impact in short-term morbidity in multiple pregnancies.

[Incidence of group B streptococcal early-onset sepsis in infants born at Centro Hospitalario Pereira Rossell between 2007-2015]. / Incidencia de sepsis precoz por Streptococcus agalactiae en recién nacidos del Centro Hospitalario Pereira Rossell en el período 2007-2015.

BACKGROUND: Group B Streptococcus (GBS) disease remains the leading cause of early-onset sepsis (EOS) in developed countries despite effective prophylaxis strategies. AIMS: To describe the incidence, clinical features and mortality of GBS EOS in infants born at Centro Hospitalario Pereira Rossell (CHPR) and analyse failure of adherence to prevention strategies. METHODS: Retrospective review of EOS cases between 2007 and 2015 collected from the bacteriology laboratory database. RESULTS: Fifteen cases of GBS EOS were identified, with an incidence of 0.23% during the study period. Intrapartum antibiotic prophylaxis (IAP) was not administered in any of the cases. All infants were symptomatic within the first 15 hours of life, mainly due to respiratory signs (80%). In one case, GBS was isolated from spinal fluid. Mortality rate was 20%. All deaths occurred in the first 24 hours of life, corresponding two thirds to preterm infants. CONCLUSION: The incidence of GBS EOS at CHPR was similar to other centers where IAP is implemented. Better adherence to prophylaxis strategies could reduce the incidence.

Outcomes of preterm infants treated with hypothermia for hypoxic-ischemic encephalopathy.

BACKGROUND: Therapeutic hypothermia reduces the risk of death, or moderate to severe neurodevelopmental impairment (NDI) in term infants with hypoxic-ischemic encephalopathy (HIE). Reports of its safety and efficacy in preterm infants are scarce. OBJECTIVE: Report short and long-term outcomes of preterm infants with HIE who received therapeutic hypothermia. METHODS: A retrospective cohort analysis of all preterm infants <36 weeks' gestation with HIE who received whole body hypothermia in a single center from January 2007 to April 2015. The primary outcome was death or moderate to severe NDI defined by moderate or severe cerebral palsy, severe hearing or visual impairment, or cognitive score < 85 on the Bayley Scales of Infant Development III (BSID III) at 18-24 months' adjusted age. RESULTS: 30 infants with a median gestational age and birthweight of 35 weeks' (range; 33-35) and 2575 g (1850-4840) and a median first postnatal blood pH of 6.81 (6.58-7.14). Complications included coagulopathy (50%), early clinical seizures (43.3%), arterial hypotension (40%), persistent metabolic acidosis (37%) and thrombocytopenia (20%). Four infants died before or soon after discharge (18.2%). Eighteen surviving infants (69.2%) had follow up data; 7 of them had moderate to severe NDI (38.9%). Cognitive, motor and language mean composite BSID III scores were 84 (54-110), 83 (46-118), and 78 (46-112). Death or moderate to severe NDI occurred in 11/22 (50%) infants with known outcomes. CONCLUSION: Large randomized trials on efficacy and safety are needed in this highly vulnerable population as the incidence of complications and the combined outcome of death and NDI is concerning.

Incidencia de sepsis precoz por Streptococcus agalactiae en recién nacidos del Centro Hospitalario Pereira Rossell en el período 2007-2015 / Incidence of group B streptococcal early-onset sepsis in infants born at Centro Hospitalario Pereira Rossell between 2007-2015

Resumen Introducción La infección por Streptococcus agalactiae (β-hemolítico del grupo B (SGB) continúa siendo una de las principales causas de sepsis precoz en países desarrollados a pesar de la implementación de profilaxis efectiva. Objetivos Describir la incidencia, características clínicas y mortalidad de sepsis precoz por SGB en recién nacidos del Centro Hospitalario Pereira Rossell (CHPR), y analizar las fallas de adherencia a las estrategias de prevención. Métodos Estudio retrospectivo de descripción de casos entre los años 2007 a 2015 identificados a partir de la base de datos del laboratorio de bacteriología. Resultados Se identificaron 15 casos de sepsis neonatal precoz a SGB con una incidencia en el período de estudio de 0,23‰. La quimioprofilaxis intraparto no fue realizada en caso alguno. Todos los recién nacidos se presentaron sintomáticos en las primeras 15 h de vida. La dificultad respiratoria fue el signo más frecuente (80%). En un caso se aisló SGB de líquido cefalorraquídeo. La mortalidad fue de 20%. Todas las muertes ocurrieron en las primeras 24 h de vida, siendo dos tercios prematuros. Conclusión La incidencia de sepsis precoz por SGB en el CHPR fue similar a la incidencia en centros donde se realiza quimioprofilaxis. Una mejor adherencia a las estrategias de prevención podría disminuir la incidencia.

Background: Group B Streptococcus (GBS) disease remains the leading cause of early-onset sepsis (EOS) in developed countries despite effective prophylaxis strategies. Aims: To describe the incidence, clinical features and mortality of GBS EOS in infants born at Centro Hospitalario Pereira Rossell (CHPR) and analyse failure of adherence to prevention strategies. Methods: Retrospective review of EOS cases between 2007 and 2015 collected from the bacteriology laboratory database. Results: Fifteen cases of GBS EOS were identified, with an incidence of 0.23% during the study period. Intrapartum antibiotic prophylaxis (IAP) was not administered in any of the cases. All infants were symptomatic within the first 15 hours of life, mainly due to respiratory signs (80%). In one case, GBS was isolated from spinal fluid. Mortality rate was 20%. All deaths occurred in the first 24 hours of life, corresponding two thirds to preterm infants. Conclusion: The incidence of GBS EOS at CHPR was similar to other centers where IAP is implemented. Better adherence to prophylaxis strategies could reduce the incidence.

Enfermedad de Wegener o granulomatosis con poliangeítis. Presentación de un caso / Wegener´s disease or granulomatosis with polyangiitis. Case presentation

RESUMEN La enfermedad de Wegener o granulomatosis con poliangeítis, es una enfermedad rara, que se caracteriza por presentar una vasculitis sistémica primaria granulomatosa, con afectación de las vías aéreas superiores, inferiores y el riñón. Se exponen las características clínicas y resultados de los exámenes complementarios realizados a un paciente del sexo masculino, de 24 años de edad, con rinitis, hemorragia pulmonar, insuficiencia renal aguda y anticuerpos anticitoplasmas de neutrófilos positivos (AU).

ABSTRACT Wegener´s disease or granulomatosis with polyangiitis is a rare disease, characterized for presenting a primary granulomatous systemic vasculitis, with affectation of the upper and lower airways and the kidneys. The authors expose clinical characteristics and the results of the complementary exams performed to a male patient, aged 24 years, with rhinitis, pulmonary hemorrhage, acute renal insufficiency, and anti-cytoplasmic antibodies of positive neutrophils (AU).

Enfermedad de Wegener o granulomatosis con poliangeítis. Presentación de un caso / Wegener´s disease or granulomatosis with polyangiitis. Case presentation

RESUMEN La enfermedad de Wegener o granulomatosis con poliangeítis, es una enfermedad rara, que se caracteriza por presentar una vasculitis sistémica primaria granulomatosa, con afectación de las vías aéreas superiores, inferiores y el riñón. Se exponen las características clínicas y resultados de los exámenes complementarios realizados a un paciente del sexo masculino, de 24 años de edad, con rinitis, hemorragia pulmonar, insuficiencia renal aguda y anticuerpos anticitoplasmas de neutrófilos positivos (AU).

ABSTRACT Wegener´s disease or granulomatosis with polyangiitis is a rare disease, characterized for presenting a primary granulomatous systemic vasculitis, with affectation of the upper and lower airways and the kidneys. The authors expose clinical characteristics and the results of the complementary exams performed to a male patient, aged 24 years, with rhinitis, pulmonary hemorrhage, acute renal insufficiency, and anti-cytoplasmic antibodies of positive neutrophils (AU).

Tuberculosis pulmonar y diabetes mellitus. Presentación de dos casos / Pulmonary tuberculosis and diabetes mellitus. Presentation of two cases

Desde la antigüedad, los médicos han sido conscientes de la asociación entre tuberculosis y diabetes mellitus. En los casos presentados existe co-morbilidad de diabetes mellitus y tuberculosis pulmonar. Se expusieron las características clínicas y resultados de los exámenes complementarios realizados; coincidiendo el tiempo de evolución de la enfermedad y difiriendo el control metabólico y las características radiológicas en cada caso.

From the antiquity, physicians have been conscious of the association between tuberculosis and diabetes mellitus. In the presented cases the co-morbidity of diabetes mellitus and pulmonary tuberculosis is present. The clinical characteristics and the results of the complementary exams were exposed, coinciding the evolution time and being different the metabolic control and the radiological characteristics in each case.

Tuberculosis pulmonar y diabetes mellitus: presentación de dos casos / Pulmonary tuberculosis and diabetes mellitus: Presentation of two cases

Desde la antigüedad, los médicos han sido conscientes de la asociación entre tuberculosis y diabetes mellitus. En los casos presentados existe co-morbilidad de diabetes mellitus y tuberculosis pulmonar. Se expusieron las características clínicas y resultados de los exámenes complementarios realizados; coincidiendo el tiempo de evolución de la enfermedad y difiriendo el control metabólico y las características radiológicas en cada caso(AU)

From the antiquity, physicians have been conscious of the association between tuberculosis and diabetes mellitus. In the presented cases the co-morbidity of diabetes mellitus and pulmonary tuberculosis is present. The clinical characteristics and the results of the complementary exams were exposed, coinciding the evolution time and being different the metabolic control and the radiological characteristics in each case(AU)

Postural responses applied in a control model in cochlear implant users with pre-lingual hearing loss.

Conclusions The assessment of postural responses (PR) based in a feedback control system model shows selective gains in different bands of frequencies adaptable with child development. Objective PR characterization of pre-lingual cochlear implant users (CIU) in different sensory conditions. Methods Total energy consumption of the body's center of pressure signal (ECCOP) and its distribution in three bands of frequencies: band 1 (0-0.1 Hz), band 2 (0.1-0.7 Hz), and band 3 (0.7-20 Hz) was measured in a sample of 18 CIU (8-16 years old) and in a control group (CG) (8-15 years old). They were assessed in a standing position on a force platform in two sensory conditions: 1 = Eyes open. 2 = Eyes closed and standing on foam. Results In condition 1, total ECCOP of PR and its proportion of energy consumption in the three bands of frequencies were similar between CIU and CG (p > 0.05). In condition 2, CIU have significantly higher ECCOP, mainly in high frequencies (bands 2 and 3) (p < 0.05). ECCOP values decreased with age also, mainly in bands 2 and 3. This behavior is interpreted in the control system model proposed as an adaptation process related with child development.

Ecuaciones de predicción derivadas de la espirometría en hombres sanos no fumadores / Prediction equations derived from spirometry in sound non-smoker men

Se hizo un estudio de corte transversal para establecer las ecuaciones de regresión o predicción de la función pulmonar normal a 85 hombres sanos no fumadores, de un área de salud del municipio Cerro en Ciudad de La Habana, en el período comprendido entre febrero y mayo del año 2001. Por medio de ajuste de regresión lineal por mínimos cuadrados de las variables espirométricas: FVC, FEV1, FEF25-75 y PEF, las ecuaciones de regresión extranjeras que se dan en la literatura como oficiales y que más se adaptaron a nuestros resultados, fueron: para FVC las de Cherniack 1972, para FEV1 las de Morris 1971, para FEF25-75 las de Morris 1971, y para PEF las de Tinker 1961 las cuales son las recomendadas para utilizarlas con nuestra población adulta del sexo masculino(AU)

Ecuaciones de predicción derivadas de la espirometría en hombres sanos no fumadores / Prediction equations derived from spirometry in sound non-smoker men

Se hizo un estudio de corte transversal para establecer las ecuaciones de regresión o predicción de la función pulmonar normal a 85 hombres sanos no fumadores, de un área de salud del municipio Cerro en Ciudad de La Habana, en el período comprendido entre febrero y mayo del año 2001. Por medio de ajuste de regresión lineal por mínimos cuadrados de las variables espirométricas: FVC, FEV1, FEF25-75 y PEF, las ecuaciones de regresión extranjeras que se dan en la literatura como oficiales y que más se adaptaron a nuestros resultados, fueron: para FVC las de Cherniack 1972, para FEV1 las de Morris 1971, para FEF25-75 las de Morris 1971, y para PEF las de Tinker 1961 las cuales son las recomendadas para utilizarlas con nuestra población adulta del sexo masculino