Interventions aimed at improving immunization rates

BACKGROUND

Immunization rates for children and adults are rising, but coverage levels have not reached national goals. As a result of low immunization rates, vaccine-preventable diseases still occur. In an era of increasing complexity of immunization schedules, rising expectations about the performance of primary care, and large demands on primary care physicians, it is important to understand and promote interventions that work in primary care settings to increase immunization coverage. A common theme across immunization programs in all nations involves the challenge of determining the denominator of eligible recipients (e.g., all children who should receive the measles vaccine), and identifying the best strategy to ensure high vaccination rates. Strategies have focused on patient-oriented interventions (e.g., patient reminders), provider interventions, and system interventions. One intervention strategy involves patient reminder/recall systems.

OBJECTIVES

Assess the effectiveness of patient reminder/recall systems in improving immunization rates, and compare the effects of various types of reminders in different settings or patient populations.

SEARCH STRATEGY

A systematic search was performed using MEDLINE (1966-1998) and 4 other bibliographic databases: EMBASE, PsychINFO, Sociological Abstracts, and CAB Abstracts. Authors also performed a search of EPOC in April 2001 to update the review. Two authors reviewed the lists of titles and abstracts, and used the inclusion criteria to mark potentially relevant articles for full review. The reference lists of all relevant articles and reviews were back searched for additional studies. Publications of abstracts, proceedings from scientific meetings, and files of study collaborators were also searched for references.

STUDY DESIGN

Randomized controlled trials (RCT), controlled before and after studies (CBA), and interrupted time series (ITS) studies written in English.

TYPES OF PARTICIPANTS

Health care personnel who deliver immunizations and children (birth to 18 years) or adults (18 years and up) who receive immunizations in any setting. Types of interventions: Any intervention that falls within the Effective Practice and Organization of Care Group (EPOC) scope and that includes patient reminder and/or recall in at least one arm of the study. Types of outcome measures: Immunization rates, or the proportion of the target population up-to-date on recommended immunizations. Outcomes were acceptable for either individual vaccinations (e.g., influenza vaccination) or standard combinations of recommended vaccinations (e.g., all recommended vaccinations by a specific date or age).

DATA COLLECTION

Each study was read independently by two reviewers. Disagreements between reviewers were resolved by a formal reconciliation process to achieve consensus.

ANALYSIS

Results are presented for individual studies as relative rates for randomized controlled trials, and as absolute changes in percentage points for controlled before and after studies. Pooled results were presented using the random effects model.

MAIN RESULTS

Patient reminder/recall systems were effective in improving immunization rates in 33 of 41 included studies, irrespective of baseline immunization rates, patient ages, type of setting, or type of vaccination. Increases in immunization rates due to reminders were in the range of 5 to 20 percentage points. Reminders were effective for childhood vaccinations (OR=2.02, 95% CI =1.49,2.72), childhood influenza vaccinations (OR=4.19, 95% CI =2.07,8.49), adult pneumococcus or tetanus (OR=5.14, 95%CI = 1.21, 21.8), and adult influenza vaccinations (OR=2.29, 95%CI = 1.69, 3.10). While reminders were most effective in academic settings (OR = 3.33, 95% CI = 1.98, 5.58), they were also highly effective in private practice settings (OR=1.79, 95% CI = 1.45, 2.22) and public health clinics (OR = 2.09, 95% CI = 1.42, 3.07). All types of reminders were effective (postcards, letters, telephone or autodialer calls), with telephone being the most effective but most costly.

REVIEWER'S CONCLUSIONS

Patient reminder/recall systems in primary care settings are effective in improving immunization rates.

Attitudes, practices, and preferences of pediatricians regarding initiation of hepatitis B immunization at birth

OBJECTIVES

To explore practices and attitudes of pediatricians toward administration of the first dose of hepatitis B vaccine to infants, and to identify factors influencing the decision of pediatricians to initiate immunization at birth versus at 1 to 2 months of age.

METHODS

A random sample of 600 pediatricians obtained from the American Academy of Pediatrics membership database was surveyed by mail.

RESULTS

Three hundred eighty (68%) of the 563 pediatricians who were located responded to the survey. Of these 380 pediatricians, 279 provided routine immunizations to children. Of the 270 pediatricians who vaccinated children with hepatitis B vaccine and indicated their practice regarding the birth dose, 50% offered the first dose of hepatitis B vaccine at birth to all infants; the rest either offered the vaccine at birth only to infants of hepatitis B surface antigen-positive mothers and mothers whose serostatus is unknown, or did not offer the birth dose to any infants at all. Practicing in the inner city, working for a medical school or government hospital, and living in a state with universal immunization supply policies were associated with the respondent giving the birth dose. The strongest perceived barriers to giving the birth dose in the hospital were the difficulty tracking these vaccines (39%), the increased cost (27%), and the lack of reimbursement from insurance companies (26%). If a combination vaccine that includes hepatitis B; diphtheria, tetanus, pertussis (diphtheria and tetanus toxoids and acellular pertussis vaccine); and polio (inactivated poliovirus vaccine) antigens become available in the near future, then 38% of physicians who currently give the birth dose to all infants would prefer to wait until 2 months of age to initiate hepatitis B immunization.

CONCLUSIONS

Efforts to achieve high implementation of hepatitis B birth dose administration may falter once a hepatitis B-containing pentavalent combination vaccine becomes available. Programmatic efforts should ensure prevention of perinatal hepatitis B virus transmission through universal prenatal hepatitis B surface antigen screening and immunoprophylaxis of high-risk newborn infants.

Association between administration of hepatitis B vaccine at birth and completion of the hepatitis B and 4:3:1:3 vaccine series

CONTEXT

The association between infant age at initiation of hepatitis B vaccination and completion of the 3-dose hepatitis B vaccination series is unclear.

OBJECTIVE

To assess the association between administration of the first dose of hepatitis B vaccine within 7 days of birth and completion of the hepatitis B vaccine series and the 4:3:1:3 vaccine series (4 doses of diphtheria-tetanus-pertussis vaccine, 3 doses of polio vaccine, 1 dose of measles-containing vaccine, and 3 doses of Haemophilus influenzae type b vaccine).

DESIGN, SETTING, AND PARTICIPANTS

Analysis of data from the 1998 National Immunization Survey, a random-digit-dialing telephone survey (n = 34,480 completed interviews) of parents of children aged 19 to 35 months from 50 states and 28 selected urban areas in the United States that included a provider record check mail survey.

MAIN OUTCOME MEASURES

Percentage of infants who received at least 3 doses of hepatitis B vaccine and percentage who received the 4:3:1:3 vaccine series, by age at receipt of the first dose of hepatitis B vaccine.

RESULTS

Overall, 86.9% of children 19 to 35 months of age in 1998 received 3 or more doses of hepatitis B vaccine, and 79.9% completed the 4:3:1:3 vaccine series. Multivariate analysis indicated that, compared with children who received the first hepatitis B vaccine dose within 7 days of birth, odds ratios (ORs) for not completing the 3-dose hepatitis B vaccine series among children who received the first dose at 8 to 41 days, 42 to 91 days, 92 to 182 days, 183 to 273 days, and 274 or more days of age were 2.4 (95% confidence interval [CI], 2.0-3.0), 7.8 (95% CI, 6.5-9.3), 9.6 (95% CI, 7.0-13. 3), 18.3 (95% CI, 12.0-28.0), and 46.6 (95% CI, 33.7-64.5), respectively; ORs for not completing the 4:3:1:3 vaccine series among these same groups were 1.0 (95% CI, 0.8-1.1), 1.0 (95% CI, 0. 8-1.1), 1.7 (95% CI, 1.3-2.3), 3.8 (95% CI, 2.6-5.6), and 4.0 (95% CI, 2.9-5.5), respectively.

CONCLUSION

Administration of the first dose of hepatitis B vaccine at birth is associated with increased likelihood of completion of the hepatitis B vaccination series. JAMA. 2000;284:978-983

How much time is spent on well-child care and vaccinations?

CONTEXT

Because well-child care represents the most important prevention opportunity in the health care system, a growing number of activities and indicators have been proposed for it.

OBJECTIVE

To measure the time spent in the various components of well-child care.

DESIGN

Time-and-motion study.

SETTING

Five private pediatric practices and 2 public providers in Rochester, NY.

PARTICIPANTS

One hundred sixty-four children younger than 2 years.

MAIN OUTCOME MEASURE

Duration of family's encounters with the primary care provider (physician or nurse practitioner), nurse, and other personnel.

RESULTS

The median encounter times and their component parts in minutes were: (1) primary care provider, 16.3 (physical examination, 4.9; vaccination discussion, 1.9; discussion of other health issues, 9.5; vaccination administration, 0); (2) nurse, 5.6 (physical examination, 3.5; vaccination discussion, 0; other health discussion, 0; vaccine administration, 1.6); and (3) other personnel, 0 for all categories. Public provider setting, African American race of the child, and administration of 4 vaccinations were significantly associated with an increase (3-4 minutes) in the duration of the primary care provider encounter. Only 8 (5%) of families read vaccine information materials.

CONCLUSIONS

Depending on whether a child makes the usual 3 or recommended 6 number of well-child visits, the total time of well-child care is 45 to 90 minutes during the first year of life and declines to less than 30 minutes per year thereafter as the number of recommended visits diminish. Because high-risk children make half as many well-child care visits as other children, a 3 to 4 minute increase in encounter time is insufficient to provide them with the same level of care as other children.

Immunization performance measurement in a changing immunization environment

OBJECTIVE

The measurement of performance in the delivery of recommended vaccinations for children is used frequently as a marker for quality of care and as an outcome for studies of interventions to improve immunization coverage levels. The critical element of immunization performance measurement is the determination of immunization status. This methodologic review 1) discusses immunization status as a measure of quality of primary care for children, 2) describes immunization status measures used in immunization intervention studies, and 3) examines selected technical issues of immunization status measurement.

METHODS AND TOPICS

1) Description of the characteristics of immunization status measurements obtained by a systematic review of studies published between 1980 and 1997 on interventions to raise immunization coverage, and 2) illustration of technical considerations for immunization status measurement using one local database and one national database of immunization histories. Technical issues for immunization status measurement include 1) the need to use documented immunization histories rather than parental recall to determine immunization status, 2) the need to link records across providers to obtain complete records, 3) the sensitivity of immunization status to missing immunization data, and 4) the potential of measures incorporating combinations of immunizations to underestimate the degree of vaccination in a population.

CONCLUSIONS

Immunization performance measurement has many characteristics of a robust quality of care measure, including high acceptance by primary care providers of routine vaccination, association of immunization status with the conduct of other clinical preventive services, agreed-on technical and programmatic standards of care, and legislative requirements for medical record documentation. However, it is not without challenges. Careful attention to technical issues has potential to improve immunization delivery health services research.

Use of EMS for seriously ill children in the office: a survey of primary care physicians

OBJECTIVES

To describe how primary care physicians (PCPs) transport seriously ill children from their offices to emergency departments (EDs).

METHODS

The authors conducted a mail survey of PCPs in upstate New York.

RESULTS

The response rate was 60% (119/199). Sixty-six percent (79/119) of the physicians had transferred at least one child from their office to an ED via EMS. Forty-five percent (53/119) had encountered a case of suspected epiglottitis in the office. EMS was used to send 45% (24/53) of suspected epiglottitis cases to the ED, while 40% (21/53) transferred children with possible epiglottitis via family auto. Similarly, the family's auto was used to transport 26% (6/23) of the patients with suspected foreign body aspiration, 46% (32/70) with severe asthma, 59% (30/51) with severe dehydration, and 37% (14/38) with suspected meningococcemia. In contrast, the family's auto was never used for patients with active seizures. The physicians denied that they would call EMS more often if transport time were shorter (58%) or if costs were less (64%). Sixty percent of the PCPs were not sure whether EMS personnel are skilled in pediatric emergencies.

CONCLUSION

The PCPs often failed to call EMS for seriously ill children seen in the office and, instead, used the family's auto for emergency transportation. In this survey, transport time and cost were not barriers to use of EMS. The physicians expressed a lack of confidence in EMS providers' pediatric skills. Targeting educational programs to PCPs that highlight 1) the availability, training, and skill of EMS personnel and 2) the medicolegal risks of family transportation may result in more appropriate use of EMS for children.

Evaluation of failure to follow vaccination recommendations as a marker for failure to follow other health recommendations

OBJECTIVE

To determine whether families who fail to vaccinate their children also fail to follow other health recommendations.

SETTING

US civilian noninstitutionalized population.

DESIGN

National survey with a stratified cluster design.

PARTICIPANTS

Adult respondents for children 19 to 35 months of age surveyed in the 1991 National Health Interview Survey with documented vaccination history.

MEASUREMENTS

Comparison of responses to 23 questions related to health behaviors between respondents of up-to-date (UTD), i.e. having received 4 doses of diphtheria and tetanus toxoids and pertussis vaccine, 3 doses of polio vaccine and one measles vaccine, and non-UTD children.

RESULTS

Of the 781 studied children, non-UTD (n = 357) and UTD (n = 424) children, or their respondents, did not differ in 18 of the 23 studied health behaviors. However, although non-UTD and UTD children were equally likely to have car seats, non-UTD children were less likely to use them always (84.3% vs. 92.9%, P = 0.002). National Health Interview Survey respondents of non-UTD children were more likely than their counterparts never to read food labels for ingredients (28.9% vs. 20.5%, P = 0.04) or for fat/cholesterol content (33.6% vs. 22.3%, P = 0.02) and never to buy low salt foods (37.5% vs. 21.5%, P = 0.001). Multivariate analyses showed that parental education level, not a child's vaccination status, was associated with compliance with the studied health behaviors.

CONCLUSION

Failure to vaccinate children on time is not consistently related to the likelihood of family member's following of other health recommendations. However, these data suggest that although mediated via parental educational levels, a child's immunization status helps to define families at risk for poor nutrition-related behaviors and those who are in need of counseling on seat belt use.

Does quality of care affect rates of hospitalization for childhood asthma?

BACKGROUND

Hospitalization rates for childhood asthma are three times as high in Boston, Massachusetts, as in Rochester, New York; New Haven, Connecticut, rates are intermediate. We undertook this study to determine how care for children admitted for asthma varies across these communities.

METHODS

We performed a community-wide retrospective chart review. We reviewed a random sample of all asthma hospitalizations, from 1988 to 1990, of children 2 to 12 years old living in these communities (n = 614). Abstracted data included demographics, illness severity, and treatment before admission.

RESULTS

Compared with Rochester children, Boston children were less likely to have received maintenance preventive therapy (inhaled corticosteroids or cromolyn [odds ratio (OR), 0.4 (0.2, 0.9)]), acute "rescue" therapy (oral corticosteroids [OR, 0.2 (0.1, 0.4)]), or inhaled beta-agonist therapy [OR, 0.5 (0.3, 1.0)]. A larger proportion of admitted asthmatic patients in Boston (34%) were in the least severely ill group-oxygen saturation 95% or above-compared with patients in Rochester (20%).

CONCLUSIONS

The quality of ambulatory care, including choice of preventive therapies and thresholds for admission, likely plays a key role in determining community hospitalization rates for chronic conditions such as childhood asthma.

Primary care involvement among hospitalized children

OBJECTIVE

To examine relations between characteristics of a child's usual source of primary care and involvement of that source before and during hospitalization.

DESIGN

Medical record review of pediatric hospitalizations.

SETTING

All hospitals in Boston, Mass; New Haven, Conn; and Rochester, NY admitting children during the calendar years 1988 through 1990.

PATIENTS

The study included 1875 randomly selected pediatric hospitalizations for five diagnostic groups (i.e., asthma and other lower respiratory tract disease, abdominal pain [including appendicitis], meningitis [bacterial and viral], toxic ingestions, and head injury). Hospital records selected were limited to children aged between 1 month and 12 years and residing in the three study communities.

OUTCOME MEASURES

Whether the primary care source examined the child before admission to the hospital, referred the child to the emergency department, or served as the in-hospital attending physician.

RESULTS

Of the medical charts reviewed, 85.7% identified primary care sources. Children in Rochester had higher rates of medical visits before admission (P < .04), referrals (P < .001), and in-hospital care provided by the primary care physician (P < .001, chi 2) than children in Boston and New Haven. Patterns of primary care involvement also varied by source of care within cities, after controlling for income and severity of illness. Compared with children from Rochester community-based private practices, children in Boston receiving care from health centers, hospitals, or community-based private practices generally had 25% to 50% lower likelihood of positive findings on all primary care involvement measures. Children in New Haven receiving care from community-based private or hospital-based practices also had lower rates, but involvement rates were not higher when they received care from health centers. Other children in Rochester and children receiving care from health maintenance organizations in all cities demonstrated almost no significant differences compared with data from Rochester community practices.

CONCLUSION

The source of primary care is associated with patterns of prehospital and hospital care among hospitalized children, although specific associations vary by city.

The arrival of the ED-based POISINDEX: perceived impact on poison control center use

The purpose of this study was to determine the prevalence of emergency department-based POISINDEX (Micromedex Inc, Denver, CO) and assess its perceived impact on use of poison control centers. Survey methodology was used. A written questionnaire was distributed to all emergency departments (EDs) in the state of New York. ED directors or their designee (n = 239) were surveyed regarding the presence of POISINDEX in their ED and their perceptions of its impact on ED use of poison control centers. Completed questionnaires were returned from 180 of 239 (75%) EDs. Of the returned questionnaires, 42 of 180 (23%) have their own POISINDEX. In 32 of 42 (76%) of these EDs that have their own POISINDEX, it was perceived that ED-based POISINDEX decreased poison control center use. Use of ED-based POISINDEX may decrease ED use of poison control centers.

Potential misuse of ipecac

STUDY OBJECTIVE

To evaluate the use of ipecac by health care professionals.

DESIGN

A descriptive case series based on a one-year review of all calls to a poison center.

SETTING

A university hospital-affiliated regional poison center.

INTERVENTIONS

The use of ipecac was judged appropriate or inappropriate based on the consensus of three professionals associated with the poison center using predetermined contraindications.

MEASUREMENTS AND MAIN RESULTS

In 20% of cases in which ipecac was used, its use was inappropriate. The most common inappropriate situation was that too much time had elapsed from the time of ingestion. Among adults the most common contraindication was the ingestion of a substance known to cause altered mental status. Among children, the most common contraindication was the ingestion of a nontoxic substance or amount of substance. The poison center recommended ipecac inappropriately less often than emergency departments and usually in children ingesting a nontoxic substance. EDs recommended ipecac inappropriately with a broader range of contraindications and more often in adults.

CONCLUSION

Ipecac has potentially adverse consequences and should not be used reflexively. Providers of emergency care should be educated about possible contraindications to its use.

The use of structured, complaint-specific patient encounter forms in the emergency department

STUDY OBJECTIVE

To assess the effect of preprinted, structured, complaint-specific patient encounter forms on documentation, use of testing, and treatment compared with free-text record keeping.

DESIGN

Nonrandomized case-control trial.

SETTING

University-affiliated, tertiary referral hospital emergency department.

METHODS

The records of all patients with lacerations, pharyngitis, asthma, or isolated closed-head injury during an eight-month period were reviewed.

INTERVENTION

Use of structured complaint-specific patient encounter forms versus traditional free-text record keeping.

MAIN OUTCOME MEASURE

The null hypothesis was that there would be no differences in documentation, test use, or practice when the structured forms were used compared with free-text record keeping.

RESULTS

Differences in documentation that favored the use of the structured forms for all four problems studied were seen consistently. Not only was documentation improved, but test use also was affected in a way that decreased use. In addition, in certain areas (eg, treatment of pharyngitis), clinical practice also was changed.

CONCLUSION

Structured, problem-specific ED records improve documentation and affect both resource use and clinical practice. These forms may be useful for improving communication and reimbursement as well as for medicolegal documentation. They provide a method for standardized quality assurance review and clinical data abstraction. Finally, they provide a method for active dissemination of clinical standards.

Central nervous system neoplasm in a young man with Martin-Bell syndrome--fra(X)-XLMR

A 17-year-old retarded male developed unilateral leg weakness with foot drop, pain, and incontinence. Workup disclosed a cauda equina tumor which, on surgical exploration, was demonstrated to merge with the conus medullaris. Pathological examination of the subtotally resected tumor led to a diagnosis of malignant ganglioglioma. Further evaluation of the patient documented marginal macro-orchidism, and chromosome studies showed fragile X. Since some neoplasms are known to be associated with chromosomal deletions and other abnormalities, we suggest that the occurrence of this tumor in this patient indicates a more than coincidental relationship between the two diagnoses.