Health screening in schools. Part I

Vision screening for correctable visual acuity deficits in school-age children and adolescents

BACKGROUND

Although the benefits of vision screening seem intuitive, the value of such programmes in junior and senior schools has been questioned. In addition there exists a lack of clarity regarding the optimum age for screening and frequency at which to carry out screening.

OBJECTIVES

To evaluate the effectiveness of vision screening programmes carried out in schools to reduce the prevalence of correctable visual acuity deficits due to refractive error in school-age children.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL) (which contains the Cochrane Eyes and Vision Trials Register) (2017, Issue 4); Ovid MEDLINE; Ovid Embase; the ISRCTN registry; ClinicalTrials.gov and the ICTRP. The date of the search was 3 May 2017.

SELECTION CRITERIA

We included randomised controlled trials (RCTs), including cluster-randomised trials, that compared vision screening with no vision screening, or compared interventions to improve uptake of spectacles or efficiency of vision screening.

DATA COLLECTION AND ANALYSIS

Two review authors independently screened search results and extracted data. Our pre-specified primary outcome was uncorrected, or suboptimally corrected, visual acuity deficit due to refractive error six months after screening. Pre-specified secondary outcomes included visual acuity deficit due to refractive error more than six months after screening, visual acuity deficit due to causes other than refractive error, spectacle wearing, quality of life, costs, and adverse effects. We graded the certainty of the evidence using GRADE.

MAIN RESULTS

We identified seven relevant studies. Five of these studies were conducted in China with one study in India and one in Tanzania. A total of 9858 children aged between 10 and 18 years were randomised in these studies, 8240 of whom (84%) were followed up between one and eight months after screening. Overall we judged the studies to be at low risk of bias. None of these studies compared vision screening for correctable visual acuity deficits with not screening.Two studies compared vision screening with the provision of free spectacles versus vision screening with no provision of free spectacles (prescription only). These studies provide high-certainty evidence that vision screening with provision of free spectacles results in a higher proportion of children wearing spectacles than if vision screening is accompanied by provision of a prescription only (risk ratio (RR) 1.60, 95% confidence interval (CI) 1.34 to 1.90; 1092 participants). The studies suggest that if approximately 250 per 1000 children given vision screening plus prescription only are wearing spectacles at follow-up (three to six months) then 400 per 1000 (335 to 475) children would be wearing spectacles after vision screening and provision of free spectacles. Low-certainty evidence suggested better educational attainment in children in the free spectacles group (adjusted difference 0.11 in standardised mathematics score, 95% CI 0.01 to 0.21, 1 study, 2289 participants). Costs were reported in one study in Tanzania in 2008 and indicated a relatively low cost of screening and spectacle provision (low-certainty evidence). There was no evidence of any important effect of provision of free spectacles on uncorrected visual acuity (mean difference -0.02 logMAR (95% CI adjusted for clustering -0.04 to 0.01) between the groups at follow-up (moderate-certainty evidence). Other pre-specified outcomes of this review were not reported.Two studies explored the effect of an educational intervention in addition to vision screening on spectacle wear. There was moderate-certainty evidence of little apparent effect of the education interventions investigated in these studies in addition to vision screening, compared to vision screening alone for spectacle wearing (RR 1.11, 95% CI 0.95 to 1.31, 1 study, 3177 participants) or related outcome spectacle purchase (odds ratio (OR) 0.84, 95% CI 0.55 to 1.31, 1 study, 4448 participants). Other pre-specified outcomes of this review were not reported.Three studies compared vision screening with ready-made spectacles versus vision screening with custom-made spectacles. These studies provide moderate-certainty evidence of no clinically meaningful differences between the two types of spectacles. In one study, mean logMAR acuity in better and worse eye was similar between groups: mean difference (MD) better eye 0.03 logMAR, 95% CI 0.01 to 0.05; 414 participants; MD worse eye 0.06 logMAR, 95% CI 0.04 to 0.08; 414 participants). There was high-certainty evidence of no important difference in spectacle wearing (RR 0.98, 95% CI 0.91 to 1.05; 1203 participants) between the two groups and moderate-certainty evidence of no important difference in quality of life between the two groups (the mean quality-of-life score measured using the National Eye Institute Refractive Error Quality of Life scale 42 was 1.42 better (1.04 worse to 3.90 better) in children with ready-made spectacles (1 study of 188 participants). Although none of the studies reported on costs directly, ready-made spectacles are cheaper and may represent considerable cost-savings for vision screening programmes in lower income settings. There was low-certainty evidence of no important difference in adverse effects between the two groups. Adverse effects were reported in one study and were similar between groups. These included blurred vision, distorted vision, headache, disorientation, dizziness, eyestrain and nausea.

AUTHORS' CONCLUSIONS

Vision screening plus provision of free spectacles improves the number of children who have and wear the spectacles they need compared with providing a prescription only. This may lead to better educational outcomes. Health education interventions, as currently devised and tested, do not appear to improve spectacle wearing in children. In lower-income settings, ready-made spectacles may provide a useful alternative to expensive custom-made spectacles.

Original papers: Prevalence of amblyogenic diseases in a preschool population sample of Valladolid, Spain

OBJECTIVES

Amblyopia is the leading cause of monocular vision loss in people under 40 years, and especially in children. The purpose of the present investigation is to determine the prevalence of amblyopia and ocular pathology, specially the most common causes of amblyopia, in a population of 3-to 6-year-old children.

PATIENTS AND METHODS

From a total of 8167 children, a geographically defined population of 3-to 6-year-old children, 2000 were randomly selected, and 1179 (58.9%) examined. Ophthalmologic examination included: Personal and familial history, visual acuity, extraocular motility, cover test at near distance, cycloplegic refraction with autorefractometer and fundus eye examination. Amblyopia was considered when corrected visual acuity was < 0.5 with Marquez optotypes and difference in visual acuity of 0.2 or more between eyes. Pathology considered as amblyogenic were strabismus, visual acuity asymmetry and anisometropia.

RESULTS

The family history showed amblyopia in 249 (21.1%), strabismus in 227 (19.2%), and refractive errors in 808 (65.5%). Cover test was positive in 78 children (6.7%). A visual acuity difference of 0.2 or more between eyes was present in 88 (7.5%) children, and anisometropia over 1.5 diopters (in spherical equivalent) was present in 17 (1.4%) subjects. One hundred and twenty-two (10.35%) children did not achieve a normal visual acuity: visual acuity in the better eye was less than 0.5 in 55 children under 5 years and less than 0.6 in 67 children over 5 years. The prevalence of amblyopia was 7.5%.

CONCLUSIONS

The data support the importance of early detection and treatment of amblyopia and the need for visual screening at an early age.

Psychological status of patients referred for orthognathic correction of skeletal II and III discrepancies

OBJECTIVE

To establish the extent of psychological problems among patients who require orthognathic treatment.

MATERIALS AND METHODS

Five aspects of psychological functioning were assessed for 162 patients who required orthognathic treatment and compared with 157 control subjects.

RESULTS

Analysis of variance did not detect any significant difference in the five psychological scores recorded for the skeletal II, skeletal III, and control groups. The proportion of subjects with one or more psychological measure beyond the normal range was 27% for skeletal II subjects, 25% for skeletal III subjects, and 26% for control subjects. One skeletal II subject (1.5%), three skeletal III subjects (3%), and five control subjects (3%) required referral for psychological counseling.

CONCLUSIONS

The orthognathic patients did not differ significantly from the control subjects in their psychological status.

Screening for correctable visual acuity deficits in school-age children and adolescents

BACKGROUND

Although the benefits of vision screening seem intuitive, the value of such programmes in junior and senior schools has been questioned. In addition to this there exists a lack of clarity regarding the optimum age, and frequency at which to carry out screening.

OBJECTIVES

The objective of this review is to evaluate the effectiveness of vision screening programmes carried out in schools in reducing the prevalence of undetected, correctable visual acuity deficits due to refractive error in school-age children.

SEARCH STRATEGY

We searched the Cochrane Central Register of Controlled Trials - CENTRAL (which contains the Cochrane Eyes and Vision Trials Register) on The Cochrane Library (Issue 3 2004), MEDLINE (1966 to August 2004) and EMBASE (1980 to August 2004). No language or date restrictions were placed on these searches. To date it has not been possible to carry out any manual searches but it is hoped to include these in a future update.

SELECTION CRITERIA

We planned to include randomised controlled trials including randomised cluster controlled trials.

DATA COLLECTION AND ANALYSIS

Two reviewers independently assessed study abstracts identified by the electronic searches. No trials were identified that met the inclusion criteria.

MAIN RESULTS

As no trials were identified, no formal analysis was performed. A narrative synthesis of other retrieved studies was undertaken in order to explain current practice.

AUTHORS' CONCLUSIONS

At present there are no robust trials available that allow the benefits of school vision screening to be measured. The disadvantage of attending school with a visual acuity deficit also needs to be quantified. The impact of a screening programme will depend on the geographical, and socio-economic setting in which it is conducted. There is therefore clearly a need for well planned randomised controlled trials, in various settings, to be undertaken so that the potential benefits and harms of vision screening can be measured.

Refractive errors in normal children and children with down syndrome or cerebral palsy

BACKGROUND AND PURPOSE

The prevalence of refractive errors in the general population is between 12 to 18%. The objective of the present study was to determine the refractive errors in healthy children and compare these results in patients with Down syndrome and with cerebral palsy.

MATERIAL AND METHOD

The refractive errors in patients between 6 to 12 years without ophthalmologic conditions were studied. The patients were divided into three groups: normal children, children with Down syndrome, and children with cerebral palsy. The results were compared.

RESULTS

258 patient were included: 200 normal children, 29 with Down syndrome, and 29 with cerebral palsy. Ametropia was found in 79.5% in the group of normal children, 93.2% in children with Down syndrome, and in 100% in children with cerebral palsy. Patients requiring optical correction included 30% in normal children, 48.2% in patients with Down syndrome, and 41.1% in the cerebral palsy group. Hyperopia was the most frequent refractive error in all three groups. Most of the refractive errors were mild to moderate.

CONCLUSIONS

Refractive errors are more frequent in patients with Down syndrome and cerebral palsy compared with normal children.

Whispered voice test for screening for hearing impairment in adults and children: systematic review

OBJECTIVE

To determine the accuracy of the whispered voice test in detecting hearing impairment in adults and children.

DESIGN

Systematic review of studies of test accuracy.

DATA SOURCES

Medline, Embase, Science Citation Index, unpublished theses, manual searching of bibliographies of known primary and review articles, and contact with authors.

STUDY SELECTION

Two reviewers independently selected and extracted data on study characteristics, quality, and accuracy of studies. Studies were included if they had cross sectional designs, at least one of the index tests was the whispered voice test, and the reference test (audiometry) was performed on at least 80% of the participants.

DATA EXTRACTION

Data were used to form 2x2 contingency tables with hearing impairment by audiometry as the reference standard.

DATA SYNTHESIS

The eight studies that were found used six different techniques. The sensitivity in the four adult studies was 90% or 100% and the specificity was 70% to 87%. The sensitivity in the four childhood studies ranged from 80% to 96% and specificity ranged from 90% to 98%.

CONCLUSION

The whispered voice test is a simple and accurate test for detecting hearing impairment. There is some concern regarding the lower sensitivity in children and the overall reproducibility of the test, particularly in primary care settings. Further studies should be conducted in primary care settings to explore the influence of components of the testing procedure to optimise test sensitivity and to promote standardisation of the testing procedure.

Managed care, school health programs, and adolescent health services: opportunities for health promotion

The rapid expansion of managed care creates opportunities and dilemmas for those involved in school health and adolescent health promotion. Managed care organizations (MCOs), public health agencies, and school and adolescent health providers share certain common goals and priorities including an emphasis on prevention, cost-effectiveness, and quality of care--and a willingness to explore innovative approaches to health promotion and disease prevention. However, MCOs often face conflicting challenges, balancing the goals of cost containment and investment in prevention. In considering support for school health programs, MCOs will be interested in evidence about the effectiveness of services in improving health and/or reducing medical expenditures. Mechanisms for improving prevention efforts within MCOs include quality assurance systems to monitor the performance of health plans, practice guidelines from professional organizations, and the contracting process between payers and health care providers. Development of partnerships between MCOs and schools will be a challenge given competing priorities, variation in managed care arrangements, structural differences between MCOs and schools, and variability in services provided by school health programs.

Adolescent idiopathic scoliosis screening of schoolgirls

Adolescent idiopathic scoliosis is a common disorder of unknown etiology. The lack of symptoms delays its detection, sometimes beyond the remedial range. In this study, consent forms were distributed to elementary schoolgirls between 11-13 years, at random, in the city of Riyadh. Out of 1,147 girls screened, 40 girls were positive on screening. In the clinic, nine girls were found to have no scoliosis, one had old poliomyelitis and one had lumbar lipoma. The remaining 29 girls had idiopathic scoliosis, giving a prevalence of 2.5%. However, the Cobb's angle were more than five degrees in nine girls only, reducing the prevalence of significant curves to 0.78%. The study was acceptable to all parties involved. We feel studies that address the issues of female screeners, transportation problems, and cost-effectiveness are needed prior to embarking on larger scale programs.

Using a computer database to record and evaluate a school screening service

School screening has been taking place in New South Wales since 1907. The need for better monitoring of the school health service to determine the outcome of the screening process has been advocated frequently. This paper reports on the development of a computerized surveillance system which allows school screening to be evaluated on an ongoing basis. The results of the first year's use of the programme on a study population of children first screened in 1989 in a northern metropolitan area of Sydney demonstrate that the system is practical and effective when used by people with little or no prior computer knowledge. It plays a role in both improving follow-up of the screening process and the assessment of the service. The prevalence rate of new defects found was four per 100 children screened. Issues raised about the screening process from the data collected are also discussed.

Comparison of the automated vision screening test to the Snellen test

The comparison of an automatic vision screening machine using the Landolt rings and the usual Snellen Chart was carried out among 123 second grade and 149 fifth grade students in an elementary school in Jerusalem. The sensitivity of the test for a cut-off point of greater than or equal to 6/12 according to the Snellen test was 41.7% (CI = 16.5-71.4) and the specificity was 86.5% (CI 78.1-92.2) for second graders. For fifth graders the values were 50.0% (CI = 20.1-79.9) and 90.6% (CI 83.7-94.8) respectively. Diagnosis by a specialist decreased the number of 'false negatives' and confirmed the pathological cases. The automatic test was well accepted by the children. Though more time is needed for assessment using the automatic test, its advantage is that no professional staff are required.

It's time: the future of school health in Australia

School medical services in Australia have a long tradition of providing community-based services to school-aged children, and in some states to preschool children. Conceived as a public health measure early this century, doctors and nurses worked in schools to address the health issues of the time, which were largely to do with nutrition, hygiene, and infectious diseases. It was perceived that many children had poor access to medical care, and began school with unaddressed health problems which often had a deleterious effect on their learning. Doctors were often employed by education authorities and only transferred to health departments many years later. In some states the service was expanded subsequently to include preschool children, based on the concept that the earlier problems were detected the earlier they could be treated appropriately and the greater the benefits to the child. While social structures, community needs and paediatric morbidity patterns have changed dramatically over recent years, there is a widespread perception that in some states school medical services have not yet embraced fully the changing needs of the population of school children they are designed to serve. Hamstrung by political expediency (with decision-making driven by political rather than scientific considerations) and bureaucratic inertia, school nurses and doctors often operate in structures and systems that are urgently in need of review and reorganization. In this paper the rationale for current processes will be reviewed critically, a model of school health services focused on contemporary paediatric needs is proposed, and a set of factors which are considered essential to the development of the school health services of the future is outlined.

A model outreach program for health care screening

The outreach program described here provides health care screening in an inner-city clinic to children and adolescents who attend any organized program in the community. The objectives are (a) to provide low-cost, accessible health care screening and (b) to provide health education. The program is supervised by a pediatric nurse practitioner who works closely with an administrative assistant, an office associate, and other clinical staff members. In the academic years 1986-1988, 668 children and adolescents were screened. Abnormal patient findings identified by the outreach program were similar to those reported from other studies. The conclusions from this program's efforts are that outreach health care screening programs are effective in evaluating the health status of children and adolescents in communities.

[Description and evaluation of the counseling and consultation activities performed by public health nurses for apprentices and students in Vaud: the youth and health program]

Since 1983 apprentices and students 16-19 years of the Canton of Vaud (Switzerland) have been offered various activities in the frame of a school-based health promotion program called "Jeunesse et Santé" (screening, health education...). This paper focuses on the description and the evaluation of emergency care and counseling activities ran by nurses in each school. During one and a half year, 969 adolescents have presented themselves for medical reasons (40%), or for problems of psychosomatic (30%) or psycho-social (30%) nature. Most of the pupils have consulted either spontaneously (40%) or after a screening procedure (40%). 297 youngsters have been sent to another institution for further evaluation and treatment (personal physician, outpatient clinic, social services). Three months after the first consultation, the nurses have contacted both the adolescents an the institutions for an evaluation: A large part of the pupils is satisfied with the help they have received (greater than 90%). However the follow-up seems more difficult to organize and less effective for the adolescents that have presented themselves with psychosocial problems. The paper ends with the advantages and the limitations of ambulatory research performed in the frame of school health activities.

Health promotion for children. Key to a lifetime of health

Evidence indicates that preventive healthcare in childhood reduces healthcare costs and enhances health. Physicians can assume a leadership role in promoting children's health by incorporating health promotion measures into their everyday practice, serving as resource persons or leaders in community and school efforts in health promotion, and lobbying for legislation aimed at preventive care. The goals of these efforts are to achieve a healthy childhood, provide a foundation for a healthy adulthood, and develop in children positive values about personal health responsibility and use of healthcare services.