Amy V. Groom

Immunization Information Systems to Increase Vaccination Rates: A Community Guide Systematic Review

CONTEXT Immunizations are the most effective way to reduce incidence of vaccine-preventable diseases. Immunization information systems (IISs) are confidential, population-based, computerized databases that record all vaccination doses administered by participating providers to people residing within a given geopolitical area. They facilitate consolidation of vaccination histories for use by health care providers in determining appropriate client vaccinations. Immunization information systems also provide aggregate data on immunizations for use in monitoring coverage and program operations and to guide public health action. EVIDENCE ACQUISITION Methods for conducting systematic reviews for the Guide to Community Preventive Services were used to assess the effectiveness of IISs. Reviewed evidence examined changes in vaccination rates in client populations or described expanded IIS capabilities related to improving vaccinations. The literature search identified 108 published articles and 132 conference abstracts describing or evaluating the use of IISs in different assessment categories. EVIDENCE SYNTHESIS Studies described or evaluated IIS capabilities to (1) create or support effective interventions to increase vaccination rates, such as client reminder and recall, provider assessment and feedback, and provider reminders; (2) determine client vaccination status to inform decisions by clinicians, health care systems, and schools; (3) guide public health responses to outbreaks of vaccine-preventable disease; (4) inform assessments of vaccination coverage, missed vaccination opportunities, invalid dose administration, and disparities; and (5) facilitate vaccine management and accountability. CONCLUSIONS Findings from 240 articles and abstracts demonstrate IIS capabilities and actions in increasing vaccination rates with the goal of reducing vaccine-preventable disease.

Pandemic Influenza Preparedness and Vulnerable Populations in Tribal Communities

American Indian and Alaska Native (AIAN) governments are sovereign entities with inherent authority to establish and administer public health programs within their communities and will be critical partners in national efforts to prepare for pandemic influenza. Within AIAN communities, some subpopulations will be particularly vulnerable during an influenza pandemic because of their underlying health conditions, whereas others will be at increased risk because of limited access to prevention or treatment interventions.We outline potential issues to consider in identifying and providing appropriate services for selected vulnerable populations within tribal communities. We also highlight pandemic influenza preparedness resources available to tribal leaders and their partners in state and local health departments, academia, community-based organizations, and the private sector.

Impact of Immunizations on the Disease Burden of American Indian and Alaska Native Children

American Indian and Alaska Native (AI/AN) people have suffered disproportionately from infectious diseases compared with the general US population. As recently as 25 years ago, rates of hepatitis A and B virus, Haemophilus influenzae type b, and Streptococcus pneumoniae infections were as much as 10 times higher among AI/AN children compared with the general US child population. In the past quarter century, routine use of childhood immunizations for hepatitis A and B viruses has eliminated disease disparities for these pathogens in AI/AN children, and significant decreases have been demonstrated for H influenzae type b, S pneumoniae, and pertussis. Nevertheless, certain infectious diseases continue to occur at higher rates in AI/AN children. The reason for continued disparities is most likely related to adverse living conditions such as household crowding, lack of indoor plumbing, poverty, and poor indoor air quality. Although tremendous strides have been made in eliminating disparities in infectious disease among AI/AN children, further gains will require addressing disparities in adverse living conditions.

Vaccination coverage of American Indian/Alaska native children aged 19 to 35 months: findings from the National Immunization Survey, 1998-2000.

The federal government has placed a priority on eliminating racial and ethnic health disparities, such as disparities in vaccination coverage, by 2010.1 This study was conducted to examine recent vaccine coverage rates for American Indian/Alaska Native (AIAN) children aged 19 to 35 months and to compare these rates with those of non-AIAN children.

Effects of a nationwide Hib vaccine shortage on vaccination coverage in the United States

BACKGROUND A shortage of Haemophilus influenzae type b (Hib) vaccine that occurred in the United States during December 2007 to September 2009 resulted in an interim recommendation to defer the booster dose, but to continue to vaccinate as recommended with the primary series during the first year of life. OBJECTIVES To quantify effects of the Hib shortage on vaccination coverage and to determine if any demographic subgroups were disproportionately affected. METHODS Data from the 2009 National Immunization Survey (NIS) were divided based on childs age at the onset of the shortage. Comparisons were made in primary series coverage by 9 months between children <7 months versus ≥7 months at the start of the shortage. Comparisons in primary series plus booster dose completion by 19 months were made between children who were <12 months versus ≥12 months at the start of the shortage. RESULTS Nationally, there was a difference in Hib primary series completion by 9 months among children age <7 months versus ≥7 months at the start of the shortage (73.9% versus 81.2%, P<0.001). There was a large difference in the percentage of children fully vaccinated with the primary series plus booster dose by 19 months among children age <12 months versus ≥12 months at the start of the shortage (39.5% versus 66.0%, P<0.001). There were differential effects of the shortage on primary series coverage among states and for some demographic characteristics. CONCLUSIONS As expected booster dose coverage was reduced consistent with interim recommendations, but primary series coverage was also reduced by 7 percentage points nationally.

Human Papillomavirus Vaccination Practices Among Providers in Indian Health Service, Tribal and Urban Indian Healthcare Facilities

PURPOSE The human papillomavirus (HPV) vaccine is of particular importance in American Indian/Alaska Native women because of the higher rate of cervical cancer incidence compared to non-Hispanic white women. To better understand HPV vaccine knowledge, attitudes, and practices among providers working with American Indian/Alaska Native populations, we conducted a provider survey in Indian Health Service, Tribal and Urban Indian (I/T/U) facilities. METHODS During December 2009 and January 2010, we distributed an on-line survey to providers working in I/T/U facilities. We also conducted semistructured interviews with a subset of providers. RESULTS There were 268 surveys and 51 provider interviews completed. Providers were more likely to administer vaccine to 13-18-year-olds (96%) than to other recommended age groups (89% to 11-12-year-olds and 64% to 19-26-year-olds). Perceived barriers to HPV vaccination for 9-18-year-olds included parental safety and moral/religious concerns. Funding was the main barrier for 19-26-year-olds. Overall, providers were very knowledgeable about HPV, although nearly half of all providers and most obstetricians/gynecologists thought that a pregnancy test should precede vaccination. Sixty-four percent of providers of patients receiving the vaccine do not routinely discuss the importance of cervical cancer screening. CONCLUSIONS Recommendations for HPV vaccination have been broadly implemented in I/T/U settings. Vaccination barriers identified by I/T/U providers are similar to those reported in other provider surveys. Provider education efforts should stress that pregnancy testing is not needed before vaccination and the importance of communicating the need for continued cervical cancer screening.

Causes and Disparities in Death Rates Among Urban American Indian and Alaska Native Populations, 1999-2009

OBJECTIVES To characterize the leading causes of death for the urban American Indian/Alaska Native (AI/AN) population and compare with urban White and rural AI/AN populations. METHODS We linked Indian Health Service patient registration records with the National Death Index to reduce racial misclassification in death certificate data. We calculated age-adjusted urban AI/AN death rates for the period 1999-2009 and compared those with corresponding urban White and rural AI/AN death rates. RESULTS The top-5 leading causes of death among urban AI/AN persons were heart disease, cancer, unintentional injury, diabetes, and chronic liver disease and cirrhosis. Compared with urban White persons, urban AI/AN persons experienced significantly higher death rates for all top-5 leading causes. The largest disparities were for diabetes and chronic liver disease and cirrhosis. In general, urban and rural AI/AN persons had the same leading causes of death, although urban AI/AN persons had lower death rates for most conditions. CONCLUSIONS Urban AI/AN persons experience significant disparities in death rates compared with their White counterparts. Public health and clinical interventions should target urban AI/AN persons to address behaviors and conditions contributing to health disparities.

Pneumonia and Influenza Mortality Among American Indian and Alaska Native People, 1990–2009

OBJECTIVES We compared pneumonia and influenza death rates among American Indian/Alaska Native (AI/AN) people with rates among Whites and examined geographic differences in pneumonia and influenza death rates for AI/AN persons. METHODS We adjusted National Vital Statistics Surveillance mortality data for racial misclassification of AI/AN people through linkages with Indian Health Service (IHS) registration records. Pneumonia and influenza deaths were defined as those who died from 1990 through 1998 and 1999 through 2009 according to codes for pneumonia and influenza from the International Classification of Diseases, 9th and 10th Revision, respectively. We limited the analysis to IHS Contract Health Service Delivery Area counties, and compared pneumonia and influenza death rates between AI/ANs and Whites by calculating rate ratios for the 2 periods. RESULTS Compared with Whites, the pneumonia and influenza death rate for AI/AN persons in both periods was significantly higher. AI/AN populations in the Alaska, Northern Plains, and Southwest regions had rates more than 2 times higher than those of Whites. The pneumonia and influenza death rate for AI/AN populations decreased from 39.6 in 1999 to 2003 to 33.9 in 2004 to 2009. CONCLUSIONS Although progress has been made in reducing pneumonia and influenza mortality, disparities between AI/AN persons and Whites persist. Strategies to improve vaccination coverage and address risk factors that contribute to pneumonia and influenza mortality are needed.

Effect of a National Vaccine Shortage on Vaccine Coverage for American Indian/Alaska Native Children

OBJECTIVES We determined the effect of national vaccine shortages on coverage with 4 doses of diphtheria and tetanus toxoids and acellular pertussis (DTaP) vaccine for American Indian/Alaska Native (AIAN) children. METHODS Data on DTaP coverage for children aged 19 to 27 months were abstracted from Indian Health Service (IHS) immunization reports. Coverage with the fourth DTaP dose (DTaP4) was compared for different periods to determine coverage levels before, during, and after the shortage. Data were stratified geographically to determine regional variation. RESULTS AIAN children experienced a significant decline (14.8%) in DTaP4 coverage during the shortage. Considerable variation was seen among IHS regions (declines ranged from 4.5% to 26.5%). CONCLUSIONS AIAN children included in IHS immunization reports experienced a greater decline in DTaP4 coverage during the shortage than the decline reported nationally for children receiving vaccine at public clinics (14.8% vs 6%). Variations in the decline in coverage highlight possible inequities in vaccine supply and distribution and in implementation of vaccine shortage recommendations. We must identify ways to ensure more equitable vaccine distribution and consistent implementation of vaccine recommendations to protect all children from vaccine-preventable diseases.

Underimmunization of American Indian and Alaska Native Children

OBJECTIVE. The goal was to determine whether disparities in childhood immunization coverage exist between American Indian/Alaska Native children and non-Hispanic white children. METHODS. We compared immunization coverage with the 4 diphtheria-tetanus-pertussis, 3 poliovirus, 1 measles-mumps-rubella, 3 Haemophilus influenza type b, and 3 hepatitis B(4:3:1:3:3) series and its individual vaccine components (≥4 doses of diphtheria, tetanus, and pertussis vaccine; ≥3 doses of oral or inactivated polio vaccine; ≥1 dose of measles, mumps, and rubella vaccine; ≥3 doses of Haemophilus influenzae type b vaccine; and ≥3 doses of hepatitis B vaccine) between American Indian/Alaska Native children and non-Hispanic white children from 2000 to 2005, using data from the National Immunization Survey. RESULTS. Although immunization coverage increased for both populations from 2001 to 2004, American Indian/Alaska Native children had significantly lower immunization coverage, compared with non-Hispanic white children, over that time period. In 2005, coverage continued to increase for American Indian/Alaska Native children but decreased for non-Hispanic white children, and no statistically significant disparity in 4:3:1:3:3 coverage was evident in that year. CONCLUSIONS. Disparities in immunization coverage for American Indian/Alaska Native children have been present, but unrecognized, since 2001. The absence of a disparity in coverage in 2005 is encouraging but is tempered by the fact that coverage for non-Hispanic white children decreased in that year.