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Bronchiolitis-associated outpatient visits and hospitalizations among American Indian and Alaska Native children--United States, 1990-2000.

Respiratory syncytial virus (RSV) is the most common cause of lower respiratory tract infection (LRTI) in young children worldwide. Approximately half of all LRTI-associated hospitalizations are caused by bronchiolitis, with RSV accounting for 50%-80% of all bronchiolitis cases. Bronchiolitis is an infection of the bronchial and bronchiolar epithelial cells, with subsequent inflammation and edema resulting in airway obstruction. This process manifests clinically as cough, wheezing, tachypnea, and respiratory distress. Because of the association between bronchiolitis and RSV infection, bronchiolitis is a good indicator of RSV disease; therefore, prevention strategies for RSV should reduce the rate of bronchiolitis. Rates of bronchiolitis-associated hospitalization for American Indian/Alaska Native (AI/AN) children are approximately twice that for the general population of U.S. children. This report describes the first estimate of rates of outpatient bronchiolitis-associated visits and updates rates of bronchiolitis-associated hospitalizations in these populations. Rates of bronchiolitis-associated outpatient visits and hospitalizations were higher for AI/AN children than for other U.S. children, and hospitalization rates for both groups increased during 1990-2000. This report underscores the high burden of bronchiolitis and the need for effective prevention programs for AI/AN communities.

Alaska↗

Venous thromboembolism hospitalizations among American Indians and Alaska Natives.

Cardiovascular disease (CVD) has been reported to be on the increase in the American Indian/Alaska Native (AI/AN) population. The Indian Health Service (IHS) hospital discharge database was used to describe venous thromboembolism (VTE)-associated hospitalizations among patients receiving IHS-reported medical care in the United States from 1980 through 1996. The average overall VTE-associated hospitalization rate in the AI/AN population during 1980-1996 was 33.1 per 100,000, however, the rate significantly decreased from 38.4 per 100,000 AI/ANs in 1980-1982 to 33.2 in 1994-1996. The average age at hospitalization was 50.4 years, which was consistent during the 17-year period. The overall annual VTE hospitalization rate was higher for females than for males (38.0 versus 27.7 per 100,000). The female VTE hospitalization rates decreased significantly from 46.1 per 100,000 in 1980-1982 to 36.7 per 100,000 in 1994-1996 (risk ratio: RR=1.3; 95% confidence interval: CI=1.1-1.4), while the rates for males remained unchanged. The VTE hospitalization rates also varied by geographic region. The hospitalization rate was highest in the East region (52.2 per 100,000) and lowest in the Alaska region (16.1 per 100,000). These data indicate that the overall VTE rate for AI/ANs may not have only decreased, but appears lower than the reported rate for Caucasians.

Adolescent↗

Diabetes prevalence among American Indians and Alaska Natives and the overall population--United States, 1994-2002.

Diabetes affects American Indians/Alaska Natives (AI/ANs) disproportionately compared with other racial/ethnic populations and has been increasing in prevalence in AI/AN populations during the past 16 years. To examine trends in diabetes prevalence among AI/ANs and the overall U.S. population and to describe disparities among these two populations, CDC analyzed data from the Indian Health Service (IHS) and the Behavioral Risk Factor Surveillance System (BRFSS). This report summarizes the results of that analysis, which indicate that diabetes continues to affect AI/ANs disproportionately and is becoming more common among younger populations. To combat this epidemic, knowledge and interventions from clinical trials and best-practice models should be translated to community-based prevention programs within AI/AN communities.

Adult↗

Research and educational approaches to reducing health disparities among American Indians and Alaska Natives.

Research and educational programs have the potential to improve health care. American Indians (AIs) suffer from considerable health disparities as compared with the general U.S. population, including significantly higher incidence and prevalence of preventable diseases like diabetes, alcoholism, and their complications. Underfunding of health programs, including the Indian Health Service, and lower socioeconomic status among AIs contribute to these disparities. Improvements in disease prevention and treatment potentially offered by research and health education programs could help to reduce health disparities. However, a history of nonparticipation in the research process and a history of dishonest research practices have raised barriers to conducting research in AI communities. Additional barriers are generated from a shortage of AI researchers and health care professionals. A research paradigm that includes the community as a full partner is necessary to promote research and education in AI communities and to translate health research into reductions in health disparities.

Alaska↗

Hepatitis A incidence and hepatitis a vaccination among American Indians and Alaska Natives, 1990-2001.

OBJECTIVES: We assessed the effect on trends in hepatitis A incidence of the 1996 recommendation for routine hepatitis A vaccination of American Indian/Alaska Native (AIAN) children. METHODS: We examined trends in hepatitis A incidence among AIAN peoples during 1990-2001 and vaccination coverage levels among children on the largest American Indian reservation. RESULTS: Hepatitis A rates among AIANs declined 20-fold during 1997-2001. Declines in hepatitis A incidence occurred among AIANs in reservation and metropolitan areas. Among 1956 children living on the Navajo Nation whose medical records were reviewed, 1508 (77.1%) had received at least one dose of hepatitis A vaccine, and 1020 (52.1%) had completed the vaccine series. CONCLUSIONS: Hepatitis A rates among AIAN peoples have declined dramatically coincident with implementation of routine hepatitis A vaccination of AIAN children.

Adolescent↗

Endemic food-borne botulism: clinical experience, 1973-1986 at Alaska Native Medical Center.

Clinical features are described for 35 cases of endemic food-borne botulism managed at a single medical center over 14 years. Important diagnostic findings included dryness of mucous membranes (90%), weakness (84%), and abnormal pupillary reaction (79%). Sensory examination was normal. Dizziness, dyspnea, and weakness of the extremities were significantly more common in patients requiring assisted ventilation. Transitory neurological deterioration occurred in 38% of patients despite the early administration of trivalent (ABE) equine antitoxin. The short course of respiratory failure suggests that toxin effect is unusually ephemeral with a mean intubation interval of only 8.6 days. Rapid recovery of strength without relapsing respiratory failure followed extubation. Tracheostomy was associated with a high complication rate and was abandoned. Extremely thick, tenacious sputum probably contributed to the high nosocomial pneumonia rate. Empirical antibiotic use to eliminate persistent C. botulinum was associated with unacceptably high nosocomial infection rates (p less than .01). Unexpected significant elevations of blood leukocyte and neutrophil band forms were noted.

Alaska↗

Preventing baby bottle tooth decay in American Indian and Alaska native communities: a model for planning.

Baby bottle tooth decay (BBTD) is a preventable dental disease which surveys have shown affects more than 50 percent of Native American children. An experimental program to prevent BBTD was implemented in 12 Native American communities. The project represented a cooperative effort by three Department of Health and Human Service agencies: Administration for Children, Youth, and Families, Head Start Bureau; Indian Health Service, Dental Program; and Centers for Disease Control, Dental Disease Prevention Activity. Intervention strategies included the training of parent volunteers, health professionals, and the tribal employees who counseled caretakers of young children and made group presentations. There was also a media campaign in each community that ran for a 3-year period. Numerous educational materials were developed including training manuals, counseling booklets, tippee cups, posters, and bumper stickers. The BBTD project's planners encouraged tailoring the education materials and strategies to fit each community. Preliminary results documented statistically significant decreases in the prevalence of BBTD at the pilot sites. This multidisciplinary, comprehensive intervention offers a model for organizing members of minority communities to prevent health problems.

Alaska↗

Atypical human T-cell lymphotropic virus type-I-associated T-cell lymphoma in a low-prevalence Alaska Native population. Implications for disease surveillance.

An atypical case of adult T-cell leukemia/lymphoma (ATL) associated with human T-cell lymphotropic virus type I (HTLV-I) occurred in a 46-year-old Inupiat Eskimo man with no behavioral risk factors for HTLV-I infection. The case was characterized by lack of atypical circulating lymphocytes, hypercalcemia, and opportunistic infections; and by complete remission of the initial renal parenchymal lymphoma. The lymphoma cells had a helper T-cell (CD4) immunophenotype. Serum antibodies to HTLV I/II, detected by Western immunoblot, were identified in specimens collected 31 months before the onset of illness, at the time of diagnosis, and up to 37 months later, shortly before the patient's death. Polymerase chain reaction was used to identify HTLV-I DNA in peripheral blood mononuclear cells and in lymphoma in involved skin. Clinicians should be alert to sporadic cases of both atypical and classic ATL, even in populations in which the prevalence of HTLV-I infection is low.

Alaska↗

Preventive care of older urban American Indians and Alaska natives in primary care.

Little is known about prevention among elderly or urban American Indian/Alaska Native (AI/AN) populations. We reviewed the medical records of 550 older urban AI/AN primary care patients to evaluate how frequently preventive measures were received. Adherence to guidelines was examined by a culturally appropriate (> or =50 years) and standard age threshold (> or =65 years), and by performance of preventive measures at any time ("ever") and in the past year. Lifetime performance was inadequate for the many measures, including mammograms (56%), fecal occult blood testing (37%), audiometry (33%), visual acuity testing (50%), smoking cessation counseling (50%), and pneumococcal (22%) and influenza (49%) vaccinations. Performance of the measures was less frequent in the prior year, but did not differ by age threshold. Predictors of adherence included female gender, having insurance, and having more health problems and medications. Nonadherence infrequently resulted from patients' failure to comply with recommendations. We conclude that use of most preventive services among elderly urban AI/ANs is suboptimal and should be improved.

Age Factors↗

Tuberculosis among American Indians and Alaska Natives in the United States, 1993-2002.

OBJECTIVES: I examined trends in and epidemiological and clinical characteristics of tuberculosis (TB) within the American Indian/Alaska Native (AIAN) population of the United States and compared TB trends and characteristics in that population with TB trends and characteristics within other racial/ethnic groups. METHODS: I analyzed all verified cases of TB reported to the US National Tuberculosis Surveillance System from January 1, 1993, to December 31, 2002. RESULTS: From 1993 through 2002, 196133 TB cases were reported, 2612 (1.3%) of which were in the AIAN population. During this period, TB case rates declined 40.4% among AIAN peoples, the smallest decrease among any US-born racial/ethnic group. In 2002, 15075 TB cases (5.2 per 100000 population) were reported, 180 of which were in the AIAN population (8.4 per 100000 population)-almost 6 times the rate for non-Hispanic Whites (1.5 per 100000 population). CONCLUSIONS: TB continues to be a significant health problem for the AIAN population. Vigilance and collaboration among local, state, federal, AIAN, and tribal TB control programs are essential to TB elimination among the AIAN population.

Adolescent↗

Tribal-based cancer control activities among Alaska Natives: services and perceptions.

Cancer has become a significant health problem in American Indian and Alaskan Native (AI/AN) communities. Despite the precipitous rise in cancer rates, limited data are available concerning cancer control services operative in these communities. To address this issue, a cross-sectional survey of all federally recognized tribes was undertaken to ascertain the breadth of cancer control activities offered and Tribal Health Directors perceptions of and priorities ascribed to cancer. This article presents responses given by AN Health Directors juxtaposed to those proffered by AI Health Directors. Nearly three-quarters (71%) of respondents perceived cancer rates to be increasing. Cancer was found to rank third, fifth among AI Health Directors, among seven health conditions when Directors were asked to rank their Tribe's commitment to confronting each one. Awareness of cancer as a public health concern coupled with competing health problems relegates cancer control activities to a lower priority. Findings underscore the need to elevate the issue of cancer in Indian Country as well as to educate investigators to become more sensitive and responsive to other Tribal health issues.

Alaska↗

Associations of early childhood infections and reduced hemoglobin levels in a historic cohort of Alaska Native infants.

A retrospective study was carried out to determine the effect of common childhood infectious diseases on the hemoglobin level of a cohort of Alaskan Eskimo children born between 1960 and 1962. Hemoglobin and health records were available on 308 children between 6-11 and 12-17 months of age. Additional records were available on 187 of these children at 18-23 months of age. Episodes of chickenpox, measles, pertussis, and lower respiratory infections were reviewed. Between 38 and 50% of infants between 6 and 23 months of age had hemoglobin levels below 11.0 g/dl. The mean hemoglobin level of infants 6-11 and 12-17 months of age decreased with increasing number of total infectious episodes occurring within the 3 months before hemoglobin measurement. This trend was not apparent for infants in the 18-23 months age interval nor were low hemoglobins predictive of illness during the 3 months after the hemoglobin determination. At the 6-11 and 12-17 month age interval the number of lower respiratory infectious were most significantly associated with a decreased hemoglobin value. These observations are consistent with more recent reports that document iron deficiency anemia among children with antecedent infections and again emphasize the role of infection in the development and maintenance of anemia in children about 1 year of age.

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Diet quality among Yup'ik Eskimos living in rural communities is low: the Center for Alaska Native Health Research Pilot Study.

OBJECTIVE: The objectives of this pilot study were to describe the nutrient intake of Yup'ik Eskimos in comparison with national intake, identify dietary sources of key nutrients, and assess the utility of the Healthy Eating Index (HEI) to measure diet quality of Yup'ik Eskimos living in rural Alaskan Native communities. PARTICIPANTS AND DESIGN: A single 24-hour recall was collected from 48 male and 44 female Yup'ik Eskimos (aged 14 to 81 years), who resided in three villages in the Yukon Kuskokwim River Delta, AK, during September 2003. MAIN OUTCOME MEASURES: HEI scores, nutrient intake, and traditional food intake. STATISTICAL ANALYSES PERFORMED: Spearman correlations for associations between variables. RESULTS: Youth scored higher than elders despite similar nutrient intakes. Overall diet quality was generally low; 63% of all participants' diets were classified as poor. Although the HEI serves to identify areas of concern with respect to diet quality, it is limited in its ability to detect the positive value of traditional foods. CONCLUSIONS: Traditional foods and healthful market foods, including rich sources of fiber and calcium, should be encouraged. Although traditional foods were important sources of energy and nutrients, market foods composed the preponderance of the diet, emphasizing the importance of appropriately modifying a diet quality index based on a Western framework, such as the HEI.

Adolescent↗

Cardiovascular disease among American Indians and Alaska Natives.

OBJECTIVE: To compare the regional differences in cardiovascular disease in AI/AN with the U.S. general population and determine the parity gap and preventable proportion of cardiovascular mortality. RESEARCH DESIGN AND METHODS: Age-adjusted cardiovascular disease mortality rates for 1981-1983 and hospital discharge rates for 1982-1984 reported by the IHS were compared with U.S. data for 1982 and 1983, respectively. RESULTS: Rates of ischemic heart disease and atherosclerosis were found to be generally low among AI/AN although those in the 25- to 44-yr age-group have higher death rates from cardiovascular disease than in the U.S. population. Although the mortality rate from cardiovascular disease in AI/AN is 19% lower than the rate for the general U.S. population, the parity gap in individual regions of the U.S. ranges from favorable to extremely unfavorable. There were also wide variations in the preventable gap theoretically possible by reduction of the three major risk factors. CONCLUSIONS: Changing nutrition and exercise patterns and the increasing prevalence of diabetes in many Indian tribes may have adverse effects in the future, possibly increasing the prevalence of heart disease. Regional differences in the prevalence of some major cardiovascular risk factors (smoking, hypertension, hypercholesterolemia, and diabetes) are the probable explanation for these differences in cardiovascular morbidity and mortality rates. Prevention and treatment of these risk factors will have the greatest impact in attempts to reduce cardiovascular disease among AI/AN. In addition, moderation in the use of alcohol, or abstinence, may prevent sudden deaths resulting from acute intoxication.

Adult↗

Guidelines for prevention and control of hepatitis A in American Indian and Alaska Native communities.

The Aberdeen Area Indian Health Service, South Dakota Department of Health, and the Centers for Disease Control and Prevention have collaborated since 1985 to investigate hepatitis A in Indian communities in the Northern Plains and to implement clinical trials of hepatitis A vaccine. After licensure of the hepatitis A vaccine in February 1995, community wide immunization programs have been implemented effectively in several communities experiencing hepatitis A outbreaks. The state health department, tribal health departments, Indian Health Service facilities, Head Start programs and schools have provided hepatitis A immunizations to children aged 2-12 years in each of these communities after obtaining parental consent. Culturally-specific educational materials were developed and extensive health education efforts were provided by IHS and tribal programs. Hepatitis A contacts age 2-12 were offered the hepatitis A vaccine at the same time they were offered passive immunization with immune globulin. To date over 70% of parents contacted by letter or in person have returned consent forms to have their children immunized. Higher response rates were obtained in communities where home visits were made to explain this program in more detail. The outbreaks appear to have stopped after 70% or more of the children aged 2-12 years were immunized. Immunization programs are being implemented in all Northern Plains Indian communities utilizing hepatitis. A vaccine from the Vaccine For Children Program. These efforts will likely eliminate hepatitis A as a health problem for Indian communities.

Adolescent↗

Mortality of American Indian and Alaska native infants.

Accurate determination of infant mortality rates among Indians in seriously hampered by variations in the identification of Indian persons and use of different subsets of the Indian population for various purposes. Lack of consistency in the reporting of racial origin on birth and death records is a source of substantial error. Because of these factors, more than the usual care must attend comparisons and inferences drawn from data in which these differences are present. At present, it would seem prudent to regard all data about American Indians as provisional. Even though Indian infant mortality remains higher than that for US all races, regardless of techniques used for estimates, the decline of Indian infant mortality by more than 80% since the establishment of the IHS is a truly remarkable achievement. This success has been ascribed to a combination of activities, including the provision of safe drinking water, especially as an integral part of the IHS program; the nearly universal immunization of Indian children; and emphasis upon comprehensive, community-oriented programs focused on maternal and child care. These successes have contributed to changes in the distribution of the leading causes of Indian infant mortality, so that the most prominent causes now are SIDS, congenital anomalies, injuries, and various infections. Because of these changes and advances in knowledge, the IHS has recently revised its five-year plan for dealing with infant mortality to provide greater attention to injuries and infections and has embarked upon a series of discussions with the American Academy of Pediatrics to address postneonatal deaths and the difficult problem of SIDS. Low socioeconomic conditions, so important in influencing mortality rates (7, 14, 29), have thus far proved to be intractable. In the meantime, success will depend upon ensuring optimal prenatal care, reducing those risk factors amenable to correction, and solving the problem of SIDS.

Alaska↗

Hepatitis B virions isolated with antibodies to the pre-S1 domain reveal occult viremia by PCR in Alaska Native HBV carriers who have seroconverted.

BACKGROUND: Occult viremia occurring before the appearance of HBsAg or after the disappearance of HBsAg is detectable by gene amplification technologies whose efficiency depends on nucleic acid preparation. STUDY DESIGN AND METHODS: To isolate HBV DNA from viremic plasma, immunoaffinity capture (IAC) of intact HBV with biotinylated pre-S1 antibodies coupled to streptavidin-coated magnetic beads was evaluated. IAC was compared with a silica-gel method (Qiagen [QSG]) and its two modifications wherein the samples were heated with lysis buffer at 60(o)C for 10 minutes (QSG-60) or at 58 degrees C for 60 minutes with proteinase-K (QSG-PK). Each HBV DNA sample was tested by heminested PCR amplification of the HBV gene sequences. A total of 36 coded serum samples were tested, including three HBsAg-positive controls and 33 former chronic HBV carriers who had seroconverted (developed antibody to HBsAg [anti-HBs]). Commercially available seroconversion panels (PHM 907, 911, and 922) were similarly tested for window-period viremia. RESULTS: In the 33 former chronic HBV carriers who had seroconverted, IAC revealed HBV DNA in 17 samples, whereas it was revealed in only 11 samples by QSG-PK (p = 0.031), 10 by QSG-60 (p = 0.016), and 9 by QSG (p = 0.0078). However, HBV DNA was not amplified from the 17 samples at 1-in-10 dilutions; thus, they were considered to have low-level viremia. IAC revealed HBV DNA as early as or earlier than the other methods in PHM 907, 911, and 922 panels. CONCLUSION: IAC is apparently an optimal method of sample preparation for amplification of HBV DNA in patients in the pre-HBsAg window period, and for detecting low-level viremia persistent in several individuals who were former chronic HBV carriers who had seroconverted (developed anti-HBs).

Alaska↗

Asthma hospitalizations among American Indian and Alaska Native people and for the general US population.

STUDY OBJECTIVES: Asthma is one of the most common chronic diseases in the United States. High rates of asthma hospitalization have been reported for some ethnic minorities; however, asthma hospitalization rates for American Indian/Alaska Native (AI/AN) populations of all ages have not been studied. In this study, we examined and compared hospitalization rates for AI/AN populations and the general population in the United States. DESIGN: Hospital discharge records with a first-listed diagnosis of asthma were evaluated for AI/AN populations and the US general population of all ages from 1988 to 2002. RESULTS: The asthma hospitalization rate for AI/AN populations decreased from 17.8/10,000 per year in 1988 to 1990 to 12.9/10,000 per year in 2000 to 2002. The overall age-adjusted rate for 2000 to 2002 was slightly lower than that for the general US population (12.9/10,000 and 16.4/10,000, respectively). However, AI/AN populations living in the Southwest region (17.6/10,000) had the highest asthma hospitalization rate among the Indian Health Service regions and the rate from 2000 to 2002 was similar to that for the general US population. The 2000 to 2002 asthma hospitalization rate for AI/AN populations < 1 year of age (infants) was higher than that in US infants, and the rates for AI/AN age groups > or = 1 year were similar to or lower than those for the general US population. CONCLUSIONS: While asthma was rarely reported among AI/AN populations before 1975, the average annual age-adjusted asthma hospitalization rate was only slightly lower for AI/AN populations than that for the US general population from 2000 to 2002. Furthermore, the asthma hospitalization rates for AI/AN populations living in the Southwest and East regions were similar to the rate for the general US population. Efforts to further increase asthma awareness and symptom recognition among AI/AN populations should be implemented to help to reduce asthma hospitalizations.

Adolescent↗