Barbara Barlow

An experimental study of acute neonatal enterocolitis—the importance of breast milk☆

Abstract Formula feeding in conjunction with hypoxia produces enterocolitis in newborn rats. Breast feeding under the same circumstances is completely protective. Enteric overgrowth of potentially pathogenic bacteria in only the formula-fed rats indicates that the gut flora plays an important role in the pathogenesis of enterocolitis. Breast milk through induction of passive enteric immunity and control of intestinal flora protects the rat and may protect at-risk premature infants from acute enterocolitis.

Low-income neighborhoods and the risk of severe pediatric injury: a small-area analysis in northern Manhattan.

OBJECTIVES The purpose of this study was to investigate the relationship between socioeconomic disadvantage and the incidence of severe childhood injury. METHODS Small-area analysis was used to examine socioeconomic risk factors for pediatric injury resulting in hospitalization or death in Northern Manhattan, New York, NY, during a 9-year period (1983 through 1991). RESULTS The average annual incidence of all causes of severe pediatric injury was 72.5 per 10,000 children; the case-fatality rate was 2.6%. Census tract proportions of low-income households, single-parent families, non-high school graduates, and unemployment were significant predictors of risk for both unintentional and intentional injury. Among the socioeconomic factors considered, low income was the single most important predictor of all injuries; other socioeconomic variables were not independent contributors once income was included in the model. Compared with children living in areas with few low-income households, children in areas with predominantly low-income households were more than twice as likely to receive injuries from all causes and four and one half times as likely to receive assault injuries. The effect of neighborhood income disparities on injury risk persisted after race was controlled. CONCLUSIONS These results illuminate the impact of socioeconomic disparities on child health and point to the need for injury prevention efforts targeting low-income neighborhoods.

Epidemiology and Prevention of Traffic Injuries to Urban Children and Adolescents

Objectives. To describe the incidence of severe traffic injuries before and after implementation of a comprehensive, hospital-initiated injury prevention program aimed at the prevention of traffic injuries to school-aged children in an urban community. Materials and Methods. Hospital discharge and death certificate data on severe pediatric injuries (ie, injuries resulting in hospital admission and/or death to persons age <17 years) in northern Manhattan over a 13-year period (1983–1995) were linked to census counts to compute incidence. Rate ratios with 95% CIs, both unadjusted and adjusted for annual trends, were calculated to test for a change in injury incidence after implementation of the Harlem Hospital Injury Prevention Program. This program was initiated in the fall of 1988 and continued throughout the study period. It included 1) school and community based traffic safety education implemented in classroom settings in a simulated traffic environment, Safety City, and via theatrical performances in community settings; 2) construction of new playgrounds as well as improvement of existing playgrounds and parks to provide expanded off-street play areas for children; 3) bicycle safety clinics and helmet distribution; and 4) a range of supervised recreational and artistic activities for children in the community. Primary Results. Traffic injuries were a leading cause of severe childhood injury in this population, accounting for nearly 16% of the injuries, second only to falls (24%). During the preintervention period (1983–1988), severe traffic injuries occurred at a rate of 147.2/100 000 children <17 years per year. Slightly <2% of these injuries were fatal. Pedestrian injuries accounted for two thirds of all severe traffic injuries in the population. Among school-aged children, average annual rates (per 100 000) of severe injuries before the intervention were 127.2 for pedestrian, 37.4 for bicyclist, and 25.5 for motor vehicle occupant injuries. Peak incidence of pedestrian and bicyclist injuries occurred during the summer months and afternoon hours, whereas motor vehicle occupant injuries showed little seasonal variation and were more common during evening and night-time hours. Age-specific rates showed peak incidence of pedestrian injuries among 6- to 10-year-old children, of bicyclist injuries among 9- to 15-year-old children, and of motor vehicle occupant injuries among adolescents between the ages of 12 and 16 years. The peak age for all traffic injuries combined was 15 years, an age at which nearly 3 of every 1000 children each year in this population sustained a severe traffic injury. Among children hospitalized for traffic injuries during the preintervention period, 6.3% sustained major head trauma (including concussion with loss of consciousness for ≥1 hour, cerebral laceration and/or cerebral hemorrhage), and 36.9% sustained minor head trauma (skull fracture and/or concussion with no loss of consciousness ≥1 hour and no major head injury). The percentage of injured children with major and minor head trauma was higher among those injured in traffic than among those injured by all other means (43.2% vs 14.2%, respectively; χ2 = 336; degrees of freedom = 1). The percentages of children sustaining head trauma were 45.4% of those who were injured as pedestrians, 40.2% of those who were injured as bicyclists, and 38.9% of those who were injured as motor vehicle occupants. During the intervention period, the average incidence of traffic injuries among school aged children declined by 36% relative to the preintervention period (rate ratio: .64; 95% CI: .58, .72). After adjusting for annual trends in incidence, pedestrian injuries declined during the intervention period among school aged children by 45% (adjusted rate ratio: .55; 95% CI: .38, .79). No comparable reduction occurred in nontargeted injuries among school-aged children (adjusted rate ratio: .89; 95% CI: .72, 1.09) or in traffic injuries among younger children who were not targeted specifically by the program (adjusted rate ratio: 1.32; 95% CI: .57, 3.07). Conclusion. Child traffic injuries, particularly those involving pedestrians, are a major public health problem in urban communities. Although the incidence of child pedestrian injuries is declining nationally and internationally, perhaps attributable to declines in walking, this trend may not be applicable in inner city communities such as northern Manhattan, in which walking remains a dominant mode of transportation. Community interventions involving the creation of safe and accessible play areas as well as traffic safety education and supervised activities for school-aged children may be effective in preventing traffic injuries to children in these communities. Additional controlled evaluations are needed to confirm the benefits of such interventions.

The impact of the Safe Kids/Healthy Neighborhoods Injury Prevention Program in Harlem, 1988 through 1991.

OBJECTIVES This study evaluated the effectiveness of a community coalition to prevent severe injuries to children in Central Harlem, New York, NY. It was hypothesized that injury incidence rates would decline during the intervention (1989 through 1991) relative to preintervention years (1983 through 1988); that the decline would be greatest for the targeted age group (5 through 16 years) and targeted injury causes (traffic accidents, assaults, firearms, outdoor falls); and that the decline would occur in the intervention community rather than a control community. METHODS Surveillance of injuries that result in hospitalization and/or death among children in the two communities has been under way since 1983. Data from this surveillance were used to test whether the incidence of severe injury declined during the intervention; other temporal variations were controlled by Poisson regression. RESULTS The incidence of injury among school-aged children in central Harlem declined during the intervention. The decline was specific to the targeted age group and targeted causes. A nonspecific decline also occurred in the control community. CONCLUSIONS The declining incidence rate in Central Harlem is consistent with a favorable program effect, but additional investigation of possible secular trend or spillover effects is needed.

Mortality and head injury: The pediatric perspective

The records of 10,098 children entered into the National Pediatric Trauma Registry (NPTR) were analyzed to define the characteristics of pediatric head injury and the impact of extracranial trauma on Central Nervous System (CNS) injury. The 4,400 NPTR head injuries were then compared with 16,524 head injuries recently reported from a predominantly adult trauma registry to illustrate potential population differences. Results indicate that children have a lower mortality, that the addition of extracranial injury significantly reduces recovery potential, that CNS injury is the predominant and most common cause of pediatric traumatic death, and that the automobile is the most lethal component of a childs environment.

Protection against Experimental Necrotizing Enterocolitis by Maternal Milk. I. Role of Milk Leukocytes

Summary: A ral model of necrotizing enterocolitis of the neonate in which maternal milk had been protective was studied to determine what components of the milk afforded protection and by what mechanism. Frozen and thawed rat milk was not protective, but formula supplemented with rat milk cells was. It was concluded that the cells provided protection. The cells, which are principally mononuclear phagocytes, can phagocytize and kill the Klebsiella pneumoniae strain used in the animal model. Animals with necrotizing enterolitis had peritonitis and bacteremia caused by this bacillus.Speculation: Milk mononuclear phagocytes may protect the neonatal rat from enterocolitis by their antibacterial and wound-healing activities or by their ability to enhance the neonatal immune response. The etiologic role of bacteria in this disease, not proven in these experiments, must be determined by experiments in germfree rats.

National pediatric trauma registry

The National Pediatric Trauma Registry (NPTR) is a multi-institutional database designed to compile information concerning all aspects of pediatric trauma care. The registry is designed and operated in a manner that maximizes data accuracy and provides this information to all participating investigators. The growth of the database has allowed the NPTR to provide the first accurate epidemiologic description of pediatric trauma as a national disease, as well as to develop national norms for pediatric trauma care. The registry presently contains 10,177 patients, and is undergoing revisions (phase II) to allow a more focused evaluation of various aspects of the clinical care and rehabilitation of the pediatric trauma patient.

Impact of a cancer screening program on breast cancer stage at diagnosis in a medically underserved urban community

BACKGROUND Our previous report showed that the disparity in breast carcinoma survival between black and white women because of advanced stage of disease at presentation in poor black women is related to their low socioeconomic status and lack of health insurance. This observation led to establishment of a community-oriented free cancer screening service. STUDY DESIGN To evaluate the impact of screening on breast cancer stage at diagnosis, analysis of data from the Harlem Hospital Tumor Registry between 1995 and 2000 was performed and compared with our 1964-1986 report. RESULTS Twenty-three percent of cancers (324 of 1,405) diagnosed between 1995 and 2000 were breast carcinoma. Data confirm that lack of insurance remains a major problem among poor black women. We observed a marked fall, from 49% in our earlier report to 21% in this study, in late-stage (III and IV) disease at presentation. This fall is associated with significant (p < 0.001) improvement in early detection of breast cancer, with 41% of cancers in stages 0 and I in this data compared with 6% in the previous study. Of note, 53% of women with breast carcinoma had breast-conserving surgery and 45% had modified radical mastectomy in this study; 71% had radical or modified radical mastectomy in the earlier report. CONCLUSIONS This study confirms the importance of a free cancer screening program in the improvement of early-stage breast cancer detection, treatment, and survival in a poor urban community.

The Epidemiology of Urban Pediatric Neurological Trauma: Evaluation of, and Implications for, Injury Prevention Programs

OBJECTIVE To describe the incidence and causes of pediatric head, spinal cord, and peripheral nerve injuries in an urban setting and to assess the implications of these data for injury prevention programs. METHODS Pediatric deaths and hospital admissions secondary to neurological trauma included in the Northern Manhattan Injury Surveillance System from 1983 to 1992 were linked to census counts to compute incidence rates. Rates before the implementation of a nonspecific injury prevention program were compared with rates after the implementation, and rates for the target population were compared to rates for the control population. Rates were analyzed on the basis of the cause of injury as well as the age, gender, and neighborhood income level of the injured. RESULTS The incidence of neurological injuries resulting in hospitalization or death was 155 incidents per 100,000 population per year; the mortality rate was 6 people per 100,000 population per year. Neurological injuries represented 18% of all pediatric injuries and accounted for 23% of all traumatic deaths. Spinal cord and peripheral nerve injuries were relatively rare (5%) compared to head injuries (95%). Minor head injuries, including isolated cranial fractures, minor concussions (<1 h loss of consciousness), and unspecified minor head injuries, accounted for the majority of neurological injuries (76%), whereas severe head injuries, including severe concussion (>1 h loss of consciousness), cerebral laceration/contusion, intracerebral hemorrhage, and unspecified major injuries, were less common (18% of all neurological injuries). Boys were more often affected than girls at every age, and this preference increased with age. Children younger than 1 year showed the highest incidence of both major and minor injuries. One- to 4-year olds showed the lowest rates, with steady increases thereafter. Traffic accidents and falls were the leading causes (38 and 34%, respectively), and assaults were the next leading causes (12%). Among children admitted to surveillance system hospitals, falls were most common in children younger than 4 years, pedestrian motor vehicle accidents were most common in late childhood, and assaults were most common in early adolescence. CASE fatality rates were 5 to 7% for all age groups except 5- to 12-year-olds, for whom the case:fatality rate was 1.9%. Residence in a low-income neighborhood was associated with an increased risk of injury (rate ratio, 1.71; confidence interval, 95%, 1.54, 1.89). The average hospitalization cost per injury was

Necrotizing enterocolitis in term infants

8502. Medicaid (54%) and other government sources (5%) covered the majority of expenses, including indirect reimbursement of usually uncollected self-pay billing (19%). Although injury incidence rates fell in both the control and intervention cohorts during implementation of a nonspecific injury prevention program, targeted age and population groups demonstrated greater relative reductions in injuries than nontargeted ones, suggesting a positive effect. CONCLUSIONS Deaths and hospital admissions secondary to pediatric neurological trauma represent a significant public health problem, with the majority of the direct cost being born by government agencies. Future efforts to prevent neurological trauma in children who live in inner cities should focus on families with low incomes and provide novel education programs regarding infant abuse, infant neglect, and infant injury avoidance. Age-appropriate school-based programs should also be developed to address traffic safety and conflict resolution.