Principales factores de riesgo de la morbilidad y mortalidad neonatales / Main risk factors of neonates morbidity and mortality

Se revisó la bibliografía disponible sobre la morbilidad y mortalidad neonatales, tanto nacional como foránea y se decidió hacer referencia a importantes aspectos relacionados con el tema, entre los cuales figuraron, además de una reseña histórica: clasificación y registro de las causas de muerte (síndrome de dificultad respiratoria, enfermedad de la membrana hialina, infecciones, displasia broncopulmonar y malformaciones congénitas), tipo de parto (complicaciones y prematuridad), así como bajo peso al nacer. De la información obtenida se infirió que el nacimiento de neonatos con insuficiencia ponderal para la edad gestacional, todavía constituye una grave situación de salud en el mundo de hoy, sobre todo en los países tercermundistas, donde no se dispone de recursos suficientes para brindar una adecuada asistencia sanitaria a la población.

The available literature either national or foreign about the neonate morbidity and mortality was reviewed and it was decided to make reference to important aspects related with the topic, among which there were figured, besides a historical review: classification and register of the death causes (distress syndrome, hyaline membrane disease, infections, bronchopulmonary dysplasia and congenital malformations), delivery type (complications and prematurity), as well as low birth weight. Of the obtained information it was inferred that the neonates birth with ponderal inadequacy for the gestational age, still constitutes a severe health situation in today's world, mainly in the third world countries, where enough resources are nor disposable to offer an appropriate health care to the population.

Survival of children following Nissen fundoplication.

BACKGROUND: Analyses of survival after fundoplication in childhood are often restricted to 30-day mortality, or to the neurologically impaired. The objective of this study was to report actuarial survival and variables associated with mortality for all children undergoing fundoplication. METHODS: This was a prospective observational study of fundoplication surgery by one surgeon; the endpoint was survival. Using a Cox proportional hazards model, gastrostomy, neurological status, tracheostomy, congenital cardiac disease, syndromic status, presence of congenital anomaly, other chronic disease, weight z-score at time of surgery, need for revisional fundoplication, use of laparoscopic surgery, gastric drainage procedures, age and sex were assessed for their influence on survival. RESULTS: Two-hundred and thirty children underwent 255 fundoplications at a median age of 3·6 years. Forty-six children (20·0 per cent) died during a median follow-up of 2·8 (range 0·5-11·2) years. Statistical modelling showed gastrostomy (relative risk of death 11·04, P < 0·001), cerebral palsy (relative risk 6·58, P = 0·021) and female sex (relative risk 2·12, P = 0·015) to be associated with reduced survival. Revisional fundoplication was associated with improved survival (relative risk of death 0·37, P = 0·037). Survivors had significantly higher weight z-scores (-1·4 versus - 2·9 for those who died; P = 0·001). The 5-year survival rate after fundoplication for children with cerebral palsy and gastrostomy was 59 per cent. CONCLUSION: Survival of children following fundoplication is related principally to the presence of a gastrostomy and neurological status. Estimates of children's life expectancy should take account of the poorer survival of neurologically impaired children who undergo fundoplication, presumably due to the related co-morbidities that lead to a gastrostomy.

Cause-specific risks of childhood death in inherited epidermolysis bullosa.

OBJECTIVE: To determine the cause-specific risks of death in children with epidermolysis bullosa (EB). STUDY DESIGN: Data were collected throughout the continental United States between 1986 and 2002 by the National EB Registry. The study design is cross-sectional (n = 3280), containing within it a nested randomly sampled longitudinal subcohort (n = 450). RESULTS: The risk of death during infancy and childhood was greatest in junctional EB (JEB), with cumulative and conditional risks of 40% to 44.7% by age 1 in both JEB subtypes, rising to 61.8% in children with JEB, Herlitz subtype and 48.2% in those with JEB, non-Herlitz subtype (JEB-nH) by age 15. In decreasing order, sepsis, failure to thrive, and respiratory failure were the major causes of death in children with JEB, plateauing by age 2 to 6. A small minority of children with epidermolysis bullosa simplex, Dowling-Meara subtype was at risk for death by age 1 (cumulative risk, 2.8%), with sepsis and respiratory failure accounting for cumulative risks of 1.9% and 0.9%. Only a minority of children with recessive dystrophic epidermolysis bullosa, Hallopeau-Siemens subtype was at risk of death (cumulative risk = 8% by age 15). Renal failure also rarely accounted for death in children with JEB-nH. CONCLUSIONS: Infants and children with inherited EB, particularly those with JEB, are at significant risk of death as a result of disease complications.

Predictors of mortality in HIV-1 exposed uninfected post-neonatal infants at the Kenyatta National Hospital, Nairobi.

OBJECTIVES: To identify potential predictors of mortality, to determine mortality rate and to identify prevalent causes of death in a cohort of HIV-1 exposed uninfected infants. DESIGN: Prospective cohort study. SETTING: Kenyatta National Hospital, Nairobi, Kenya. SUBJECTS: Three hundred and fifty one HIV-1 exposed uninfected post-neonatal infants who survived to one year of age. RESULTS: Sixteen infants died (post-neonatal mortality rate of 47/1000 live births), 14 (88%) before six months of age. The most frequently identified medical conditions at death included bronchopneumonia, diarrhoea and failure to thrive. In multivariate analysis, prematurity (RR=10.5, 95%CI 3.8-29.1, p<0.001), teenage motherhood (RR=3.6, Cl 1.0-13.2, p=0.05) and symptomatic maternal HIV-1 disease (RR=2.7, CI 0.9-7.7, p=0.06) were associated with infant mortality. CONCLUSION: Prematurity, teenage motherhood and symptomatic HIV-1 maternal disease were important predictors for post-neonatal mortality in this cohort of HIV-1 exposed uninfected infants. These factors should be considered in monitoring and follow up in prevention of mother-to-child HIV-1 transmission (PMTCT) programs.

Food insecurity, malnutrition and mortality in Maewo and Ambae islands, Vanuatu.

This study reports on findings from the ex post evaluation of the Maewo Capacity Building project in Vanuatu which was funded by World Vision Australia. The objective of the evaluation was to examine the extent to which the infrastructure and systems left behind by the project contributed to the improvement of household food security, and health and nutritional outcomes in Maewo island, using Ambae island as a comparator The household food security of 817 households selected by a two stage cluster sampling method was assessed using a modified version of the Radimer-Comell hunger scale and the US National Measure of food security. Anthropometric measurement in children (6-59 months) and mortality data were also obtained. The prevalence of food insecurity without hunger was estimated at 15.3% (95%CI: 12.1% to 19.2%) in Maewo versus 38.2% (95%CI: 33.6% to 43.0%) in Ambae while food insecurity with hunger in children did not vary by location. After controlling for age, gender and household food security status, children aged 6-59 months in Maewo were less likely to be underweight than children of the same age in Ambae (OR: 0.66, 95%CI 0.38 to 0.99). No difference was detected between the two locations in terms of stunting and wasting prevalence. The crude mortality rate (CMR) was lower in Maewo (CTvIIR=0.47/10,000/day, 95%CI: 0.39 to 0.55) than Ambae (CMR= 0.59/10,000/day, 95%CI: 0.51 to 0.67) but no difference existed in mortality in children under five years old. The major causes of death were similar in both locations and the causes frequently reported were malaria, acute respiratory infection and dianheal diseases. The evaluation found that Maewo had better health and nutrition outcomes but the infrastructure left behind by the project and the livelihood system may have been weakened by cyclone Ivy that devastated the region from 25 to 27 February 2004.

Relation of vitamin A and carotenoid status to growth failure and mortality among Ugandan infants with human immunodeficiency virus.

Although growth failure is common during pediatric infection with human immunodeficiency virus (HIV) and associated with increased mortality, the relation of specific nutrition factors with growth and mortality has not been well characterized. A longitudinal study was conducted with 194 HIV-infected infants in Kampala, Uganda. Plasma vitamin A, carotenoids (alpha-carotene, beta-carotene, beta-cryptoxanthin, lycopene, and lutein/zeaxanthin), and vitamin E were measured at age 14 wk, and weight and height were followed up to age 12 mo. Vitamin A and low plasma carotenoid concentrations were predictive of decreased weight and height velocity. Between ages 14 wk and 12 mo, 32% of infants died. Underweight, stunting, and low concentrations of plasma carotenoids were associated with increased risk of death in univariate analyses. Plasma vitamin A concentrations were not associated with risk of death. In a final multivariate model adjusting for weight-for-age, plasma beta-carotene was significantly associated with increased mortality (odds ratio: 3.16, 95% confidence interval: 1.38 to 7.21, P < 0.006). These data suggest that low concentrations of plasma carotenoids are associated with increased risk of death during HIV infection among infants in Uganda.

Impact of the human immunodeficiency virus type-1 on common pediatric illnesses in Zambia.

The seroprevalence of HIV-1 and in-patient mortality in children with common pediatric illnesses was studied. Between October 1990 and July 1991 at the Department of Paediatrics and Child Health, University Teaching Hospital (UTH), Lusaka, Zambia, mothers of all pediatric admissions were interviewed and counselled for enrollment of their children into the study. Of a total of 1323 children seen, 1266 children (600 female and 666 male) were enrolled into the study. Pneumonia (28 per cent), malaria (24 per cent), malnutrition (18 per cent), and diarrhoea (10 per cent) constituted over 80 per cent of the total admission diagnoses. Tuberculosis (5 per cent) was the fifth commonest cause of admission (61 out of 1266 children). A total of 354 out of the 1266 (28 per cent) children were found to be seropositive for HIV-1 compared to a seroprevalence rate of 9 per cent in children attending accident and emergency for traumatic injuries (P=0.001). High HIV-1 seroprevalence rates were found in children with tuberculosis (69 per cent), malnutrition (41 per cent), pneumonia (28 per cent). and diarrhoea (24 per cent). The overall mortality in hospital among HIV-seropositive children (19 per cent) was significantly higher than those who were HIV-seronegative (9 per cent) (P = < 0.0001).

[Life-threatening conditions in infancy]. / Zhizneugrozhaiushchie sostoianiia v mladencheskom vozraste.

Using the method of cohort survey covering all infants born in 1987-1988, residing during 12 months at the territory of Kirov region of the city of Baku the frequency and risk factors of life-threatening conditions (LTC) were studied. It was found that the frequency of LTC constitutes 14.6 +/- 1.36. The increased risk factors for LTC are: consanguineous marriages, unsatisfactory living conditions, low family incomes, the maternal age under 20, the third ordinal number of delivery or more, prematurity of the fetus, the peculiarities of the course and nature of the pathology. The degree of risk for LTC in different pathologies depends not on their prevalence among infants but on the peculiarities of their course.