Adolescent immunization: rationale, recommendations, and implementation strategies

School-based HPV immunization of young adolescents: effects of two brief health interventions

Adolescent immunization rates for human papillomavirus (HPV) are low and interventions within school-based health centers (SBHCs) may increase HPV uptake and series completion. We examined the effect of a parent health message intervention on HPV vaccination intent, first dose uptake and series completion among adolescents who received care at SBHCs. Via computer-assisted telephone interviews (CATI), 445 parents of young adolescents were randomly assigned to 2 two-level interventions using a 2 × 2 design (rhetorical question (RQ) or no-RQ and one-sided or two-sided message). The RQ intervention involved asking the parent a question they were likely to endorse (e.g., "Do you want to protect your daughter from cervical cancer?") with the expectation that they would then behave in a manner consistent with their endorsement (i.e., agree to vaccinate). For the one-sided message, parents were given information that emphasized the safety and effectiveness of HPV vaccine, whereas the two-sided message acknowledged that some parents might have concerns about the vaccine, followed by reassurance regarding the safety and effectiveness. At CATI conclusion, parents indicated intentions to have their adolescents vaccinated. Parents who endorsed any intent were sent a consent form to return and all adolescents with signed returned consents were vaccinated at SBHCs. Medical records were reviewed for uptake/completion. Parents were 87% female; adolescents were 66% male and racially/ethnically diverse. 42.5% of parents indicated some intention to immunize, 51.4% were unsure, and 6.1% were not interested. 34% (n = 151) of adolescents received their first dose with series completion rates of 67% (n = 101). The RQ component of the intervention increased intention to vaccinate (RR = 1.45; 95%CI 1.16,1.81), but not first dose uptake or series completion. The 1-sided and 2-sided messages had no effect. This brief, RQ health intervention enhanced intent, but did not impact vaccination rates, likely due to the time delay between the intervention and consent form receipt.

Managed care organizations' performance in delivery of adolescent immunizations, HEDIS, 1999-2002

PURPOSE

The Health Plan Employer Data Information Set (HEDIS) provides comparative information across health plans to measure the quality of care and preventive services for health plan beneficiaries. We examined recent trends in adolescent immunizations recommended by the Advisory Committee for Immunization Practices (ACIP) measured through HEDIS and reported to the National Committee for Quality Assurance (NCQA).

METHODS

The study was based on a longitudinal regression analysis of commercial managed care organizations' HEDIS measures from 1999-2002. HEDIS performance measures and plan characteristics include a sample of approximately 100-400 enrollees per plan each year. The outcome measures were the proportions of enrollees aged 13 years sampled in the plan who received measles-mumps-rubella vaccine (MMR), hepatitis B vaccine, and varicella vaccine.

RESULTS

The immunization rates for all three antigens increased significantly from 1999 to 2002 (MMR: 57-68%; hepatitis B: 28-51%; and varicella: 21-38%). Factors in the final multivariable models that were found to be significantly associated with increased proportions immunized with MMR vaccine, hepatitis B vaccine, and varicella vaccine include year of report, presence of school entry laws, years in business up to 25 years, and operating in the northeastern U.S. region; the only factor associated with decreasing immunization rates for all antigens was the number of providers per 100 commercial enrollees.

CONCLUSIONS

Consistent with previous reports, adolescent immunization rates are improving yet remain suboptimal. Strategies to increase immunization rates, as well as to improve documentation of immunization status, among commercial health insurance plans need to be developed and implemented.

Immunisation of refugee and migrant young people: can schools do the job?

OBJECTIVES

To assess immunisation needs, primary health care (PHC) use and trial a school-based immunisation service for refugee and migrant young people attending an Intensive English Centre (IEC) high school in Western Sydney.

METHODS

We surveyed students attending an IEC in Western Sydney, assessing self-reported immunisation status and use of PHC services via questionnaires translated in six languages. Those students who were not immunised for hepatitis B and measles-mumps-rubella (MMR) were provided the first and second dose of a three-dose hepatitis B immunisation schedule and a single dose of MMR vaccine. We compared the immunisation requirements for MMR and hepatitis B with utilisation of PHC.

RESULTS

One-hundred and sixty-five students (85%) returned the questionnaire. Forty-nine students (30%) reported previous immunisation with MMR and 29 (18%) with hepatitis B. As part of the school immunisation program, 142 (74%) received MMR vaccine, 151 (78%) received the first dose of hepatitis B vaccine, 144 (95%) received the second dose of hepatitis B, and 34 (23%) received the third hepatitis B dose elsewhere. Sixty-six students (40%) reported seeing a doctor in the past year. Students who had not seen a doctor in the previous year were significantly more likely to request immunisation (p < 0.01).

CONCLUSIONS AND IMPLICATIONS

Refugee and migrant young people attending an IEC in Western Sydney report low immunisation rates. Our study highlights the urgent need for education and health to work together to provide specialised immunisation services for refugee and migrant young people.

Vaccine coverage levels after implementation of a middle school vaccination requirement, Florida, 1997-2000

OBJECTIVE

Little information is available about the effectiveness of school entry vaccination requirements at the middle school level. This study examined coverage levels among students entering seventh grade in Florida following implementation of a school entry vaccination requirement in 1997.

METHODS

The authors analyzed county-specific vaccination coverage levels (three doses of hepatitis B vaccine, a second dose of measles, mumps, and rubella [MMR] vaccine, and a booster dose of tetanus and diphtheria toxoids [Td]) among students entering public and private schools in Florida from 1997 through 2000. In 1998, a survey of all county health departments was conducted, and the resulting data were linked to county-specific vaccination rates.

RESULTS

During the 1997-1998 school year, the first year the requirement went into effect, at school entry 121,219 seventh-grade students (61.8%) were fully vaccinated, 72,275 seventh grade students (36.9%) lacked one or more doses of vaccine but were considered in process, 1,817 were non-compliant (0.9%), and 763 had medical or religious exemptions (0.4%). In the 2000-2001 school year, the proportions of students reported fully vaccinated at school entry had increased to 66%. Most of this change was related to an increase in hepatitis B coverage. There was a significant inverse relationship between the proportion of students fully vaccinated and the size of the county's seventh grade population.

CONCLUSIONS

The seventh grade vaccination entry requirement was associated with sustained high levels of vaccination coverage. Passing a school entry vaccination requirement appears may be sufficient to increase coverage, but other strategies may be required to achieve full immunization of middle school students.

Adolescent immunizations. are we ready for a new wave?

CONTEXT

Factors associated with vaccination coverage rates for the 20% of U.S. adolescents enrolled in managed care organizations (MCOs) are not known.

OBJECTIVES

To examine recent trends in receipt of two doses of measles-mumps-rubella (MMR2) and three doses of hepatitis B (Hep B3) among U.S. adolescents enrolled in managed care organizations (MCOs); to determine whether specific characteristics of MCOs are associated with higher vaccination rates; and to assess the impact of state middle school immunization requirements on these rates.

DESIGN

Longitudinal (1996-1999) and cross-sectional (1999) analyses of National Committee for Quality Assurance (NCQA) data to estimate adolescent vaccination coverage rates for MMR2 and Hep B3. In 2002, using 1999 data only, a cross-sectional analysis examined the relationship of specific plan characteristics and state immunization laws with immunization coverage.

MAIN OUTCOME MEASURES

Percentage of 13 year olds in MCOs with documented receipt of MMR2 and Hep B3.

RESULTS

From 1996 to 1999, MMR2 rates increased from 56% to 64%, and from 1997 to 1999, Hep B3 rates increased from 23% to 38%. By 1999, higher rates for both vaccines had been achieved in larger plans (p<0.001 and p<0.003 for MMR2 and Hep B3, respectively), those with the highest NCQA accreditation status (p<0.003), those in New England (p<0.001), and those in states with middle school immunization requirements (p<0.001).

CONCLUSIONS

Despite encouraging increases, adolescent immunization rates are significantly below the Healthy People 2010 goal of 90%. State laws and accreditation incentives are effective. Research is needed to identify additional interventions to increase vaccination coverage in the adolescent population.

A bi-state, metropolitan, school-based immunization campaign: lessons from the Kansas City experience

INTRODUCTION

Through school-based immunization programs, large numbers of children can be vaccinated in a cost-effective manner. Information from successful programs can be valuable to communities, schools, or pediatric health care providers considering the implementation of a school-based immunization program. The purpose of this study was to identify factors considered key to the success of a large bi-state, metropolitan, multi-school district, school-based, hepatitis B immunization program.

METHOD

Immunizations were offered to 14,865 sixth-grade students in 16 school districts at 123 public and private school buildings. Personnel from 6 health departments and numerous volunteers administered the vaccines. Twenty-two semistructured interviews were conducted with a representative sample of program participants from schools, health departments, and the coordinating immunization coalition. A qualitative, grounded theory analysis was performed using data from the interviews.

RESULTS

The following categories emerged and were considered important issues in the success of a school-based program: organization, time, obtaining consent, educational opportunity, school support, and student tracking.

DISCUSSION

School-based immunization programs can be successful, but they require a coordinated effort with school support to meet the challenges of obtaining consent and tracking students.

Economic evaluation of a metropolitan-wide, school-based hepatitis B vaccination program

The results of an evaluation of a large metropolitan-wide, school-based hepatitis B vaccination program provide further evidence that such programs are effective and cost-beneficial. The percentage of 6th grade students fully immunized against hepatitis B rose from approximately 8% to 82% in the program. Administering the vaccine at school was $1.46 per dose less than traditional methods. Over $24 million of potential health care costs have been avoided through the program.