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Biomedical subjects

Alex R Kemper

Publications and source records attributed to Alex R Kemper.

15 recordsLinked to original sources
PubMed2004

Hearing and vision screening program for school-aged children.

BACKGROUND: Hearing and vision screening programs for school-aged children are common, yet little is known about their impact. OBJECTIVE: To evaluate Michigan's screening program, in which local health department (LHD) staff screen school-aged children using standardized protocols. METHODS: This project was completed in three phases: interviews with officials and screening technicians from ten LHDs, audit of LHD records regarding outcomes of screening during the 2000-2001 school year, and telephone interviews with randomly selected parents of children with an abnormal screen. RESULTS: Variations in LHD program implementation pertained to methods for tracking outcomes, screening of older children, parental notification of screening results, and availability of follow-up hearing clinics. According to LHD records, documentation of follow-up examination after an abnormal screen was low (hearing 27%, vision 25%). In contrast, most parents reported follow-up (74% hearing, 76% vision), and many reported that this resulted in treatment (50% hearing, 74% vision). In logistic regression modeling, the odds of follow-up after hearing or vision screening according to parents was not associated with income, health insurance status, or race/ethnicity. For hearing screening, the odds of follow-up decreased with school grade (p <0.001); however, the proportion who received treatment did not vary by grade. For vision screening, follow-up did not vary by grade, but the proportion who received treatment increased with grade (p =0.05). CONCLUSIONS: According to parent reports, most children had follow-up after an abnormal screen, and the majority of these children received treatment. Screening school-aged children for sensory impairment appears to be an important public health function.

Adolescent↗
PubMed2004

Prevalence and distribution of corrective lenses among school-age children.

BACKGROUND: No population-based data are available regarding the proportion of school-age children who have corrective lenses in the U.S. The objective of this study was to quantify the proportion of children who have corrective lenses (glasses or contact lenses) and to evaluate the association of corrective lenses with age, gender, race/ethnicity, health insurance status, and family income. METHODS: Children 6 to 18 years of age were identified in the 1998 Medical Expenditure Panel Survey. National estimates were made of the proportion with corrective lenses. Logistic regression modeling was used to assess factors that were associated with corrective lenses. RESULTS: Based on the 5,141 children in the 1988 Medical Expenditure Panel Survey, an estimated 25.4% of the 52.6 million children between 6 and 18 years had corrective lenses. Girls had greater odds than boys of having corrective lenses (odds ratio, 1.41; p < 0.001). Insured children, regardless of race/ethnicity, and uninsured nonblack/non-Hispanic children had similar odds of having corrective lenses. Compared with uninsured black or Hispanic children (odds ratio, 1), greater odds of corrective lens use was found among uninsured nonblack/non-Hispanic children (odds ratio, 2.29; p = 0.002) and black or Hispanic children with public (odds ratio, 1.67; p = 0.005) or private health insurance (odds ratio,1.77; p = 0.004). Among families with an income > or =200% of the federal poverty level, the odds of having corrective lenses increased with age (p < or = 0.04). In contrast, among those families <200% of the federal poverty level, the odds of having corrective lenses at 12 to 14 years was similar to 15- to 18-year olds (p = 0.93). CONCLUSIONS: The use of corrective lenses suggests that correctable visual impairment is the most common treatable chronic condition of childhood. Income, gender, and race/ethnicity, depending on insurance status, are associated with having corrective lenses. The underlying causes and the impacts of these differences must be understood to ensure optimal delivery of eye care.

Adolescent↗
PubMed2004

Valuing vision.

Explore the source record for details and available documents.

Amblyopia↗
PubMed2004

Patterns of vision care among Medicaid-enrolled children.

OBJECTIVE: To describe patterns of vision care among Medicaid-enrolled children. METHODS: We evaluated claims data over a 1-year period among children who were 18 years and younger, living in Michigan, and continuously enrolled in Medicaid but did not have a complex medical condition or were disabled. For this study, vision care comprised eye care services provided by optometrists or ophthalmologists and lens services, including dispensing and fitting of corrective lenses. RESULTS: Children in rural counties had increased odds of receiving eye care (odds ratio [OR]: 1.24) or lens services (OR: 1.22) compared with those in urban counties. In urban counties, non-Hispanic white children had greater odds than Hispanic or nonwhite children to have eye care (OR: 1.37) and lens services (OR: 1.37). An increasing supply of eye care professionals per population within a county was associated with decreased vision care in urban counties and slightly increased eye care and no changes in lens services in rural counties. Urban children who received mostly fee-for-service Medicaid had greater odds of receiving vision care than those with longer periods of managed care. Rural children who received mostly fee-for-service Medicaid had greater odds of eye care but similar odds of lens services. Regardless of urban/rural status, girls had increased odds of receiving eye care (OR: 1.24 for urban, 1.20 for rural) and lens services (OR: 1.36 for urban, 1.24 for rural). CONCLUSIONS: Patterns emerged that suggest underutilization or overutilization of vision care services. Such differences may have an impact on the development of children or waste limited health care resources.

Child↗
PubMed2003

Association between outpatient follow-up and pediatric emergency department asthma visits.

BACKGROUND: The National Heart, Lung, and Blood Institute (NHLBI) guidelines recommend that patients receive a follow-up outpatient asthma visit after being discharged from an emergency department (ED) for asthma. OBJECTIVE: To measure the frequency of follow-up outpatient asthma visits and its association with repeat ED asthma visit. DESIGN: We conducted a retrospective cohort study of children with asthma using claims data from a university-based managed care organization from January 1998 to October 2000. We performed a multivariate survival analysis using Cox proportional hazards model to determine the effect of follow-up outpatient asthma visits on the likelihood of a repeat ED asthma visit, after controlling for severity of illness, patient age, gender, insurance, and the specialty of the primary care provider. RESULTS: A total of 561 children had 780 ED asthma visits. Of these, 103 (17%) had a repeat ED asthma visit within 1 year. Almost two-thirds of children (66%) did not receive outpatient follow-up for asthma within 30 days of an ED asthma visit. Outpatient asthma visits within 30 days of an ED asthma visit are associated with an increased likelihood (relative risk = 1.80; 95% confidence interval 1.19, 2.72) for repeat ED asthma visits within 1 year. CONCLUSIONS: Most patients do not have outpatient follow-up after an ED asthma visit. However, those patients that present for outpatient follow-up have an increased likelihood for repeat ED asthma visits. For the primary care provider, these outpatient follow-up visits signal an increased risk that a patient will return to the ED for asthma and are a key opportunity to prevent future ED asthma visits.

Adolescent↗
PubMed2003

Preschool vision screening in primary care after a legislative mandate for diagnostic eye examinations.

BACKGROUND: Kentucky legislation now requires that children entering public school receive a diagnostic eye examination. METHODS: Mail survey of randomly selected office-based primary care pediatricians (PDs, n = 221) and family physicians (FPs, n = 207) in Kentucky to assess the impact of the mandated eye examination. RESULTS: The response rate was 71% PDs and 51% FPs. Most offer preschool vision screening (PD 86%; FP 79%; P = 0.16), but many report they will be less likely to offer it in the future because of the mandated diagnostic eye examination (PD 61%; FP 50%; P = 0.09). Perceived barriers to the diagnostic eye examination include lack of parental knowledge about the requirement, belief by parents that they will need to pay, difficulty in getting an appointment, and lack of endorsement by primary care physicians. CONCLUSION: Most primary care physicians in Kentucky offer preschool vision screening, but many now are likely to reduce their screening effort. Until more data are available regarding the impact of the required eye examination, primary care providers should not change their screening practices.

Attitude of Health Personnel↗
PubMed2003

Under scrutiny: smallpox vaccine recommendations.

The eradication of smallpox is widely considered to be one of the great achievements of public health. However, international terrorism in the US and elsewhere has led to increasing concern about vulnerability to a smallpox bioterror attack. Timely vaccination is highly protective against smallpox but carries risks of morbidity and mortality. Significant debate has therefore emerged regarding the optimal strategy for defence. In principle, there are three options: either mass or limited vaccination prior to an attack; quarantine and vaccination of all suspected cases of smallpox following an attack with isolation and vaccination of potential case contacts; and mass vaccination after the identification of a case of smallpox. This paper reviews smallpox disease, smallpox vaccination and the development of current smallpox vaccination policy in the US. Mathematical models of the spread of smallpox and control strategies are reviewed to explore specific smallpox vaccine policy considerations. Limitations of these models are considered and recommendations are made for future research.

Humans↗
PubMed2002

Claims of equivalence in randomized controlled trials of the treatment of bacterial meningitis in children.

OBJECTIVE: To evaluate claims of therapeutic equivalence in studies of the treatment of bacterial meningitis in children. METHODS: We performed a systematic review of randomized controlled trials of antimicrobial therapy for bacterial meningitis in children indexed in MEDLINE and published after 1980 and that claimed equivalency. The sample size of each trial was compared with the minimum sample size needed to rigorously claim equivalence. The primary endpoint was case fatality. RESULTS: Twenty-five studies were identified that met the inclusion criteria. Two of these were specifically designed to test equivalence, and the remaining based claims of equivalence on failed tests of superiority. The majority of these trials (24 of 25) that claimed equivalence had sufficient sample size to exclude a 20% difference in mortality between the tested therapies. Only 3 of the 25 trials could exclude a 10% difference in mortality. CONCLUSION: Few of the trials in this study had sufficient sample size to claim equivalence within 10% of the expected mortality. Proving equivalency is challenging because large sample sizes are often needed to ensure adequate statistical power to rule out clinically important differences between the standard of care and new therapies.

Anti-Bacterial Agents↗
PubMedDate not supplied

Receipt of specialty eye care by children.

BACKGROUND: No nationally representative data are available regarding use of eye care services by children. OBJECTIVES: To determine the proportion of children who receive specialty eye care and to evaluate the association of such care with age and other factors associated with health care utilization. METHODS: We used the 2000 National Health Interview Survey to estimate the proportion of nonblind children who received eye care in the preceding 12 months. The association between eye care and the factors of interest among children aged 6-17 years was measured through adjusted bivariate comparisons and logistic regression modeling. RESULTS: Eye care was received in the preceding 12 months by an estimated 7.3% (95% confidence interval [CI] 6.0-8.6) of the 22.8 million children aged 0-5 years and 24.8% (95% CI 23.5-26.2) of the 48.5 million children aged 6-17 years. Among children aged 6-17 years, girls had 29% greater odds than boys to have received eye care (P=.001). Among children <200% of the federal poverty level, those with public health insurance had greater odds of receiving eye care than did uninsured children or those with private health insurance (P<.001). Among children >200% of the federal poverty level, uninsured children had lower odds than did children with public or private health insurance (P<.004) to receive eye care. Well-child care was associated with increased eye care utilization among children aged 12-14 years (P<.001). CONCLUSIONS: Receipt of specialty eye care is common and increases with age. However, there are marked variations among school-aged children. Future studies should address the causes and effects of these findings.

Adolescent↗
PubMedDate not supplied

Services provided for preschool-aged children with suspected amblyopia.

BACKGROUND: Little is known about the pattern and variation of care offered to preschool-aged children who have had an abnormal vision screening test. PURPOSE: To evaluate the variations in pediatric eye care services and availability of optometrists and ophthalmologists for preschool-aged patients, referral patterns, and barriers to providing care as perceived by eye care specialists. METHODS: A survey was mailed to 542 ophthalmologists and a random sample of 501 optometrists actively practicing in Michigan. RESULTS: The response rate was 65% (optometrists, 75%; ophthalmologists, 57%). More optometrists than ophthalmologists evaluated preschool-aged children (97% vs 79%; P < .001). Of these, most managed amblyopia (80% vs 77%; P = .372) and strabismus (89% vs 80%; P = .002) themselves. Fewer optometrists than ophthalmologists dilated eyes routinely during the first evaluation of a preschool-aged child (39% vs 93%; P < .001). The leading barrier to care for preschool-aged children reported by both optometrists and ophthalmologists was difficulty of the examination (25% vs 23%; P = .501). Optometrists reported that most of their patients were referred from community-based screening programs or by parent self-referral. Ophthalmologists reported that most of their preschool-aged patients were referred from primary care providers. CONCLUSIONS: There are different sources of referrals for optometrists and ophthalmologists. Although most eye care specialists treat amblyopia, the types of care offered by optometrists and ophthalmologists differ. Future studies should address the impact that these patterns have on outcomes and cost. The results of these studies should be shared with those responsible for screening.

Amblyopia↗
PubMedDate not supplied

Expected adverse events in a mass smallpox vaccination campaign.

CONTEXT: Recent anthrax attacks in the United States have raised concern about the nation's vulnerability to a smallpox attack. Many strategies have been suggested to minimize the impact of such an attack, ranging from quarantine and vaccination of case contacts to resumption of routine vaccination. Before the latter strategy is adopted, an understanding of the likely consequences of mass vaccination is essential. COUNT: Number of adverse events resulting from two vaccination campaigns: vaccinating persons 1 to 29 years of age and vaccinating those 1 to 65 years of age. CALCULATION: Number of adverse events = incidence rate of adverse events x number vaccinated. We assumed 75% vaccine uptake in the target group (i.e., we estimated that about 25% of potential vaccine recipients would be excluded because they are, or have close contact with, individuals who have eczema or are immunocompromised). DATA SOURCE: Historical data on the incidence of adverse events from smallpox vaccination were identified by a literature search. Number vaccinated was drawn from the January 2000 U.S. Census estimate. RESULTS: Fever (<1 case per 5 vaccine recipients) and rash (<1 case per 100 vaccine recipients) would be the most common adverse events. Serious adverse events, including encephalitis (<3 cases per million) and death (<2 cases per million), although rare, would be more common than with other currently recommended vaccines. After excluding high-risk individuals and their contacts, we estimate that a vaccination strategy directed at people aged 1 to 29 years would result in approximately 1600 serious adverse events and 190 deaths. Vaccinating people aged 1 to 65 years would result in approximately 4600 serious adverse events and 285 deaths. LIMITATIONS: While advances in health care over the past three decades could mitigate vaccine complications, the increased number of unimmunized high-risk individuals (e.g., those with eczema or immune suppression) could increase complication rates. CONCLUSIONS: The decision to resume smallpox vaccination depends on weighing the likelihood of a smallpox attack and its anticipated mortality against expected harm from a mass immunization program. Smallpox vaccine has a higher complication rate than any other vaccine currently being used. Careful prevaccination exclusion of high-risk individuals and their close contacts would be essential to minimize complications of a mass vaccination campaign, although such exclusions necessarily mean that some proportion of the population will remain susceptible to smallpox.

Adolescent↗