Alaska Native People Research Articles

Readers’ Theatre: A Communication Tool for Colorectal Cancer Screening

Colorectal cancer (CRC) is the second leading cause of cancer mortality for Alaska Native people, yet it can be almost totally prevented through colonoscopy screenings. A 25-minute Readers' Theatre script was developed with and for Alaska Native and American Indian Community Health Workers (CHWs) and the people in their communities to provide CRC screening information, model ways to talk about CRC screening, increase comfort with talking about CRC, and encourage healthy lifestyle choices. Grounded in Indigenous methodologies, this paper describes the collaborative development, implementation, and evaluation of a CRC Readers' Theatre. 94% (161/172) of participants from 11 Readers' Theatre completed a written evaluation. 90% (145) of participants reported feeling more comfortable talking about CRC and 77% (124) described healthy changes they planned to make. Readers' Theatre was associated with increased knowledge, comfort talking about CRC, and served as a catalyst for positive intent to change behavior.

Sharing our pathways: Native perspectives on education in Alaska

Originally published in the Sharing Our Pathways newsletter of the Alaska Rural Systemic Initiative, the essays in this volume describe school reform strategies, curricula, and pedagogical practices that incorporate the indigenous knowledge systems of Alaska Native people into the formal education system. Individual sections consider contributions from or inspired by, among others, the Yup'ik, Tlingit, Unangan, Athabascan, and Inupiaq tribes. Covering ten years of pioneering education initiatives, this comprehensive collection will prepare Alaska Native students for the future while preserving and strengthening their ties to the past.

The Impact of Patient and Provider Factors on Depression Screening of American Indian and Alaska Native People in Primary Care

The US Preventive Services Task Force recommends routine depression screening in primary care, yet regular screening does not occur in most health systems serving Alaska Native and American Indian people. The authors examined factors associated with administration of depression screening among Alaska Native and American Indian people in a large urban clinic. Medical records of 18 625 Alaska Native and American Indian adults were examined 1 year after implementation of a depression screening initiative. Multilevel logistic regression models examined associations between patient and provider factors and administration of the Patient Health Questionnaire-9. Forty-seven percent of patients were screened. Women were more likely than men to be screened (50% vs 43%, P < .001). Increased screening odds were associated with older age, increased service use, and chronic disease (P < .001) but not with substance abuse disorders or prior antidepressant dispensation. Women previously diagnosed with depression had higher odds of screening (P = .002). Men seen by male providers had higher odds of screening than did men seen by female providers (P = .040). Screening rates peaked among providers with 2 to 5 years of employment with the clinic. Cross-sectional analysis of medical record data was of unknown reliability; there were limited sociodemographic data. Even with significant organizational support for annual depression screening, primary care providers systematically missed men and patients with infrequent primary care visits. Outreach to male patients and additional supports for primary care providers, especially in the first years of practice, may improve screening and treatment for depression among Alaska Native and American Indian people.

Abstract 17388: Applicability of a Western Model of Hypertension in a Yup'ik Eskimo Population

Hypertension (HT) is a powerful contributor to cardiovascular disease. Importantly, HT is becoming increasingly common in non-western and rural contexts. While much literature has clarified the role of- and risk factors for HT in urban, western contexts little is known about the relevance of these results to other populations. This abstract explores the applicability of a western model of HT to a sample of Yup'ik Eskimo people. As part of the Center for Alaskan Native Health Research study we interviewed Yup'ik individuals residing in 7 rural villages located in Southwestern Alaska. Covariates of interest were age, sex, education, body composition, physical activity, tobacco use, household composition, and ethnic identification. We assessed the association between vascular risk factors and the odds of having either normal (systolic 120 to 129 mmHg) or borderline to hypertensive (systolic ≥ 130 mmHg) as compared to optimal (systolic &lt; 120 mmHg) blood pressure with multinomial logistic regressions. Data comes from 1015 Yup'ik individuals: 54% female, mean age 37.6 (SD 17.4). Mean systolic BP was 120.07 mmHg, 20.7% had systolic BP ≥ 130 mmHg. In our final model age (one year increase; odds ratio = 1.06), male sex (1.46), waist circumference (one cm increase; 1.04), ever smoking tobacco (1.31), being single (compared to married; 1.44), and having 4 or more biological children (compared to none; 0.74) were associated with having borderline or definite hypertension. A similar pattern was observed for the presence of normal blood pressure as compared to optimal blood pressure - age (1.02), male sex (1.79), waist circumference (1.02), ever smoking tobacco (1.21), and being single (compared to married; 1.62). There were no direct effects of education, physical activity, or ethnic identification on the odds of HT. Interactions suggest individuals identifying highly with both Yup'ik and White culture have slower age related increases in HT, and that high levels of education negate differences in HT across all categories of ethnic identification. HT is emerging as an important risk factor among Yup'ik and other Alaskan Native people. Western models for HT may be applicable to Alaska Native populations; differences may elucidate causes and mechanisms across populations.

Self-reported Asthma among American Indian and Alaska Native People in Alaska

This study describes the lifetime prevalence of self-reported asthma among American Indian and Alaska Native (AI/AN) people who participated in the Education and Research Towards Health (EARTH) study in Alaska. We conducted a cross-sectional analysis of asthma prevalence by sex and its associations with sociodemographic, health, and environmental factors. Among 3,828 AI/AN adults, we found a higher age-sex adjusted prevalence of asthma (15.4%) than is found in the general U.S. adult (11.0%) population based on the 2006 National Health Interview Survey. After multivariable analysis, self-reported asthma among men was associated with increased age, unemployment, lower income, and obesity. Among women, self-reported asthma was associated with increased age, being divorced/separated, living in Alaska's southcentral region, self-reported fair/poor health status, obesity, and indoor mold. Our data suggest that AI/AN adults have higher prevalence of lifetime asthma than the general U.S. population. Further study is necessary to understand asthma in this population.

Indian Health Service Innovations Have Helped Reduce Health Disparities Affecting American Indian And Alaska Native People

The Indian Health Service (IHS), a federal health system, cares for 2 million of the country's 5.2 million American Indian and Alaska Native people. This system has increasingly focused on innovative uses of health information technology and telemedicine, as well as comprehensive, locally tailored prevention and disease management programs, to promote health equity in a population facing multiple health disparities. Important recent achievements include a reduction in the life-expectancy gap between American Indian and Alaska Native people and whites (from eight years to five years) and improved measures of diabetes control (including 20 percent and 10 percent reductions in the levels of low-density lipoprotein cholesterol and hemoglobin A1c, respectively). However, disparities persist between American Indian and Alaska Native people and the overall US population. Continued innovation and increased funding are required to further improve health and achieve equity.

Cultural Context in the Effort to Improve Oral Health Among Alaska Native People: The Dental Health Aide Therapist Model

The Alaska Native people in rural Alaska face serious challenges in obtaining dental care. Itinerant care models have failed to meet their needs for more than 50 years. The dental health aide therapist (DHAT) model, which entails training midlevel care providers to perform limited restorative, surgical, and preventive procedures, was adopted to address some of the limitations of the itinerant model. We used quantitative and qualitative methods to assess residents' satisfaction with the model and the role of DHATs in the cultural context in which they operate. Our findings suggest that the DHAT model can provide much-needed access to urgent care and is beneficial from a comprehensive cultural perspective.

Elimination of hepatocellular carcinoma and acute hepatitis B in children 25 years after a hepatitis B newborn and catch-up immunization program

Alaska Native people experience the highest rates of acute and chronic hepatitis B virus (HBV) infection and hepatocellular carcinoma (HCC) in the United States. We examined the effect of a universal newborn immunization with hepatitis B vaccine and mass population screening immunization program initiated in 1984 on rates of HBV and HCC in children 25 years later. During this time, the population of Alaska Native people grew from an estimated 75,000 to 130,000 persons. A surveillance system to detect acute HBV infection in Alaska Native facilities was established in 1981. Cases of HCC in children under 20 years of age were identified using a National Cancer Institute (NCI)-funded Cancer Registry established in 1969 coupled with an active surveillance program of screening persons with chronic HBV semiannually for alpha-fetoprotein since 1982. The incidence of acute symptomatic HBV infection in persons <20 years of age fell from cases 19/100,000 in 1981-1982 to 0/100,000 in 1993-1994. No cases of acute HBV have occurred in children since 1992. The incidence of HCC in persons <20 years decreased from 3/100,000 in 1984-1988 to zero in 1995-1999 and no cases have occurred since 1999. The number of identified hepatitis B surface antigen-positive children <20 years in the Alaska Native population declined from 657 in 1987 to two in 2008. Universal newborn vaccination coupled with mass screening and immunization of susceptible Alaska Natives has eliminated HCC and acute symptomatic HBV infection among Alaska Native children and this approach is the best way to prevent HBV-related disease in children.

Family Wellness Warriors

This article discusses the development and implementation of a culturally relevant resiliency model to address the physical, mental, emotional, and spiritual wellness needs of adults who have experienced harm. Common diseases in adulthood have been linked to abuse in childhood. To end abuse and improve health in Alaska, Alaska Native people are forming partnerships with health care organizations, government agencies, social service providers, and faith communities to disseminate Family Wellness Warriors Initiative strategies. Nearly 3000 people have participated in Family Wellness Warriors Initiative trainings. Through this healing work, families and communities are working together to change health disparities and restore hope.

Enhancing Access to Cancer Education for Rural Healthcare Providers via Telehealth

Healthcare providers serving rural populations face numerous barriers to accessing educational programming. Difficulties accessing continuing professional education contribute to the challenges of providing comprehensive health care in the rural setting. Telehealth can inform and educate rural providers about changes in medicine and evidence-based practices, both of which may help them provide quality care. The Native People for Cancer Control Telehealth Network used telehealth technology to deliver a cancer education series in 2008 and 2009 to Washington and Alaska rural healthcare providers who treated American Indians and Alaska Native people. Customizing presentation content to providers' educational needs encouraged attendance. Evaluation indicated videoconferencing technology was positively received for delivery of the educational sessions. This series demonstrated videoconferencing was a satisfactory means of delivering real-time, interactive cancer educational programming to providers who might not otherwise have access to such programs.

Heart Disease Mortality among Alaska Native People, 1981–2007

Historically, Alaska Native (AN) people have exhibited low overall rates of heart disease mortality compared with the U.S. white (USW) population. We compared AN and USW heart disease mortality rates during the 27-year period from 1981 through 2007. We compared AN and USW heart disease mortality rates overall and by gender, age, and disease subtype. We calculated age-adjusted rates for AN people for three nine-year periods from 1981 through 2007 and compared them with the rates for USW people. AN people > or = 35 years of age had a significantly lower rate of heart disease mortality compared with their USW counterparts (rate ratio [RR] = 0.80). The lower overall RR was due primarily to a lower ischemic heart disease mortality RR (RR = 0.63). Overall heart disease mortality decreased during the 27-year study period for both the AN (33.1%) and USW (35.0%) populations. However, hypertensive heart disease mortality increased 155.2% for AN people and 13.7% for USW people. Age-specific heart disease mortality was about 30.0% lower for AN people > or = 75 years of age compared with their USW counterparts, while it was virtually identical for the two racial/ethnic groups among people 35-74 years of age. The age-adjusted AN heart disease mortality rate was consistently about 20.0% lower than the USW rate from 1981 through 2007, with similar RRs for men and women. However, combining all ages and all heart disease subgroups into a single, age-adjusted statistic obscures many important differences across ages and disease subtypes.

2009 Pandemic Influenza A H1N1 in Alaska: Temporal and Geographic Characteristics of Spread and Increased Risk of Hospitalization among Alaska Native and Asian/Pacific Islander People

Alaska Native people have suffered disproportionately from previous influenza pandemics. We evaluated 3 separate syndromic data sources to determine temporal and geographic patterns of spread of 2009 pandemic influenza A H1N1 (pH1N1) in Alaska, and reviewed records from persons hospitalized with pH1N1 disease in 3 areas in Alaska to characterize clinical and epidemiologic features of disease in Alaskans. A wave of pH1N1 disease swept through Alaska beginning in most areas in August or early September. In rural regions, where Alaska Native people comprise a substantial proportion of the population, disease occurred earlier than in other regions. Alaska Native people and Asian/Pacific Islanders (A/PI) were 2-4 times more likely to be hospitalized than whites. Alaska Native people and other minorities remain at high risk for early and substantial morbidity from pandemic influenza episodes. These findings should be integrated into plans for distribution and use of vaccine and antiviral agents.

Cultural Context in the Effort to Improve Oral Health Among Alaska Native People: The Dental Health Aide Therapist Model

Cultural Context in the Effort to Improve Oral Health Among Alaska Native People: The Dental Health Aide Therapist Model

Azathioprine Metabolite Measurements Are not Useful for Following Treatment of Autoimmune Hepatitis in Alaska Native and other Non-Caucasian People

In autoimmune hepatitis (AIH) patients treated with azathioprine, the utility of measuring thiopurine methyltransferase (TPMT) and azathioprine metabolites has been limited. To evaluate the association between TPMT genotype and enzyme activity, and the impact of TPMT enzyme activity on levels of azathioprine metabolites and leukopenia to assess the clinical utility of monitoring azathioprine metabolites in Alaska Native and other non-Caucasian AIH patients. Individuals with AIH were recruited at the Alaska Native Medical Center (Alaska, USA) and the University of Texas Southwestern Medical Center (Texas, USA). Identification of TPMT genotype and measurement of enzyme activity were performed. The metabolites 6-thioguanine nucleotides (6-TGN) and 6-methylmercaptopurine (6-MMP) were measured in participants who were on azathioprine, and the associations with disease remission and leukopenia were assessed. Seventy-one patients with AIH were included. The distribution of TPMT genotypes was similar to that reported in other populationbased studies. TPMT genotype and phenotype were strongly associated (P<0.0001). Levels of 6-TGN and 6-MMP correlated with azathioprine dose only in individuals with normal TPMT enzyme activity. Patients with leukopenia due to azathioprine were no more likely to have abnormal TPMT enzyme levels than those without leukopenia (P=1.0). No specific level of 6-TGN metabolites was associated with remission or leukopenia. Results of the present study were consistent with previous studies in Caucasian populations. TPMT genotype and phenotype correlated well, and levels of 6-TGN and 6-MMP metabolites were not associated with remission of AIH or toxicity of azathioprine. The present study confirmed the limited utility of monitoring levels of azathioprine metabolites in AIH patients.

Secondhand smoke exposure in Alaskan households with children

Secondhand smoke (SHS) exposure causes premature death and disease in children and non-smoking adults; the home is the primary source of SHS exposure. The aim of this study was to assess variance in the prevalence of children's SHS exposure in Alaskan households with an adult smoker according to rurality, race/ethnicity, income and education, household age composition, marital status, amount smoked each day, and beliefs in SHS health consequences. Telephone interviews were conducted between 2004 and 2007 on a population-based random sample of 1119 Alaskan adult smokers with children living in the household. Respondents living with children over 5 years of age reported a significantly (p <0.05) higher prevalence of home SHS exposure, compared with those living with younger children. Respondents 40 years and older reported significantly more exposure than others. Alaska Native smokers reported significantly lower SHS exposure in their homes than those of other races, as did those living in very rural areas. Respondents' heavier smoking was significantly associated with more SHS exposure. The sub-population of adults living without other adults was approximately 1.5 times more likely to report SHS exposure than those living with other adults. As expected, having a no-smoking rule in the home greatly lowered the risk of SHS exposure in the home. Although most smokers with children believed that SHS is harmful, some need to convert those beliefs into actions. The results from this study suggest that those with school-aged children, and moderate to heavy smokers should be targeted for intervention, given their high prevalence of home SHS exposure. Future work should examine reasons for low exposure levels among Alaska Native people to inform programmatic efforts in other communities.

Prevalence and Distribution of the c.1436C→T Sequence Variant of Carnitine Palmitoyltransferase 1A among Alaska Native Infants

To use genotype analysis to determine the prevalence of the c.1436C→T sequence variant in carnitine palmitoyltransferase 1A (CPT1A) among Alaskan infants, and evaluate the sensitivity of newborn screening by tandem mass spectrometry (MS/MS) to identify homozygous infants. We compared MS/MS and DNA analyses of 2409 newborn blood spots collected over 3 consecutive months. Of 2409 infants, 166 (6.9%) were homozygous for the variant, all but one of whom were of Alaska Native race. None of the homozygous infants was identified by MS/MS on the first newborn screen using a C0/C16 + C18 cutoff of 130. Among 633 Alaska Native infants, 165 (26.1%) were homozygous and 218 (34.4%) were heterozygous for the variant. The prevalence was highest in Alaska's northern/western regions (51.2% of 255 infants homozygous; allele frequency, 0.7). The CPT1A c.1436C→T variant is prevalent among some Alaska Native peoples, but newborn screening using current MS/MS cutoffs is not an effective means to identify homozygous infants. The clinical consequences of the partial CPT1A deficiency associated with this variant are unknown. If effects are substantial, revision of newborn screening, including Alaska-specific MS/MS cutoffs and confirmatory genotyping, may be needed.

Distinct geographical and demographic distribution of hepatitis B virus genotypes in the Canadian Arctic as revealed through an extensive molecular epidemiological survey

Very little is known of hepatitis B virus (HBV) in Canadian Arctic indigenous populations, where HBV was considered endemic prior to the introduction of HBV vaccine. This study expands upon an HBV seroepidemiological survey conducted between 1983 and 1985 throughout the Canadian Arctic, to characterize HBV in this population. Archived hepatitis B surface antigen (HBsAg)-positive sera (n = 401) were processed for HBV DNA, followed by sequencing and phylogenetic analysis of the HBsAg- and HBcAg-coding regions. Sixty-nine per cent of samples (277/401) were DNA positive, with most having low viral load (median 3.4 log 10 IU/mL). The predominant HBV genotype observed was genotype B (HBV/B, 75%), followed by HBV/D (24%) and HBV/A (1%). All HBV/B strains clustered within subgenotype B6, a newly recognized HBV genotype among western circumpolar Inuit and Alaska Native people. HBV/D strains included both D3 (88%) and D4 (12%) subgenotypes, while all HBV/A strains were subgenotype A2. An association of HBV genotype B with Inuit living in the eastern Arctic and an association of genotype D with First Nation (Dene) living in the western Arctic was observed. This study establishes the high prevalence of HBV/B6 and HBV/D genotypes in Arctic populations and reveals their marked distribution within the Canadian Arctic based on geographical and demographic attributes.

Diabetes prevalence, incidence, complications and mortality among Alaska Native people 1985–2006

Objectives. To examine trends in diabetes prevalence, incidence, complications and mortality between 1985 and 2006 among Alaska Native people.Study design. We used data from the population-based Alaska Native Diabetes Registry, which includes all people who receive care in the Alaska Tribal Health System.Methods. We compared the periods of 1986–1990 and 2002–2006 for diabetes-related amputations, renal replacement and mortality using Poisson regression. Complications and mortality data were examined for trends using Poisson regression. Survival analyses for those diagnosed since 31 December 1985 were performed using the Cox proportional hazard model.Results. Age-adjusted diabetes prevalence increased from 17.3 in 1985 to 47.6/1,000 in 2006. The number of Alaska Native people living in Alaska with diabetes increased from 610 in 1985 to 3,386 in 2006. Diabetes incidence rates have also increased. Comparing age-adjusted rates for the 5-year periods 1986–1990 and 2002–2006, amputations decreased from 5.3 to 2.6/1,000, renal replacement decreased from 3.3 to 1.2/1,000 and mortality decreased from 41.7 to 33.2/1,000. Yearly analyses showed a downward trend for amputations, renal replacement and mortality rates. Survival analyses showed a significantly higher hazard ratio for any amputations, major amputations and renal replacement for the earlier time period compared to the most recent time period.Conclusions. An increase in risk factors, awareness, funding and case-finding may be contributing to the increase in prevalence and incidence of diagnosed diabetes. While diabetes prevalence and incidence are increasing among Alaska Native people, our results suggest that even in remote, rural areas, complications and mortality can be reduced.

Impact of a statewide childhood vaccine program in controlling hepatitis A virus infections in Alaska

Historically, Alaska experienced cyclic hepatitis A virus (HAV) epidemics, and the HAV rate among Alaska Native people was significantly higher than among other racial/ethnic groups. We evaluated the impact of universal childhood vaccination, initiated in 1996, on HAV epidemiology in Alaska by analyzing HAV cases reported to the State of Alaska. HAV incidence in all age groups declined 98.6% from 60.0/100,000 in 1972–1995 to 0.9/100,000 in 2002–2007. The largest decrease (99.9%) was in Alaska Native people, whose incidence (0.3) in 2002–2007 was lower than the overall U.S. 2007 rate (1.0). Among age groups, the decrease (99.8%) among children aged 0–14 years was the largest. Routine childhood vaccination has nearly eliminated HAV infection in Alaska.

Tobacco use among Alaska Native people in the EARTH study.

While aggregate rates of tobacco use for Alaska Native (AN) and American Indian people are high, use rates vary among populations and factors associated with use are not fully understood. For AN people living in three regions of Alaska, we present prevalence of tobacco use as well as factors associated with use. Using data from 3,828 participant questionnaires, associations with tobacco use are examined with chi-square tests and multivariate logistic regression. Covariates investigated include demographic factors, identification with tribal tradition, language spoken in the home, binge drinking, and depression screening results. Current smoking was more prevalent among men. In multivariate analysis, higher likelihood of current smoking was found for participants with these characteristics: younger, unmarried, low income, and increased frequency of binge drinking. For women, additional characteristics included no high school diploma and positive depression screening. Participants from southeastern Alaska were less likely to be current smokers. Current smokeless tobacco use rates were similar across gender. Higher likelihood of current smokeless use was found in southwestern Alaska and among those with positive depression screening. Women with low income and who reported at least some identification with tribal tradition had increased odds of current smokeless use. More than 20% of smokeless tobacco users reported initiating by age 10. Rates of tobacco use by AN people continue to be higher than other U.S. populations. Tobacco initiation prevention efforts targeting AN youth at an early age are recommended, given the early age of initiation demonstrated in this study.