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PubMed1993

Telephone health surveys: potential bias from noncompletion.

OBJECTIVES: Little is known about the effect of noncompletion on telephone surveys of health issues. This paper identifies a little-studied source of noncompletion, passive refusal, and evaluates its contribution to noncompletion bias along with two other sources: noncooperation and noncontact. Passive refusals include respondents who repeatedly request callbacks and households where interviewers repeatedly encounter an answering machine. METHODS: Measures of noncompletion (noncooperation, passive refusal, and noncontact), demographic and socioeconomic characteristics, health risk factors, and indicators of health care access and health status were collected through the Orange County Health Surveys on 4893 respondents. The surveys sampled by random-digit dialing and interviewed by computer-assisted telephone. RESULTS: Passive refusals have a substantial impact on completion rates and bias due to noncompletion. Commonly used definitions for completion rates may underestimate the bias due to noncompletion because they omit passive refusals. After we controlled for demographic and socioeconomic factors, few noncompletion biases appeared on selected health indicators. CONCLUSIONS: These results suggest improved reporting of completion rates and support a multivariate framework for studying noncompletion in telephone health surveys.

Adolescent↗
PubMed2005

Distance learning at biomedical faculties in bosnia & herzegovina.

Increase and development of distance learning technologies over the past decade has exposed the potential and the efficiency of new technologies. Benefit and use of contemporary information technologies is the area where medical informatics got the most on understanding and importance. Definition of distance learning as "use of technologies based on health care delivered on distance" covers areas such as electronic health, tele-health (e-health), telematics, telemedicine, tele-education, etc. For the need of e-health, telemedicine, tele-education and distance learning there are various technologies and communication systems from standard telephone lines to the system of transmission digitalized signals with modem, optical fiber, satellite links, wireless technologies, etc. Tele-education represents health education on distance, using Information Communication Technologies(ICT), as well as continuous education of a health system beneficiaries and use of electronic libraries, data bases or electronic data with data bases of knowledge. In this paper authors described activities on introduction of distance learning in teaching process at Medical faculty, University of Sarajevo, Bosnia and Herzegovina. Internet was not really meant to be a means of human communication at first; but the clearly the Net become a main piece of human communication.

Bosnia and Herzegovina↗
PubMedDate not supplied

Improving the accuracy of identifying lesbians for telephone surveys about health.

Knowledge about the health status and health care needs of lesbians is limited by the lack of population-based studies, although recent survey methods research offers suggestions that may be relevant to involving lesbians in more rigorous studies. To explore the transferability of findings about the general population to research on lesbian health, focus groups were conducted in 1997-1998 with self-identified lesbians in five U.S. urban areas. Videotaped telephone interviews stimulated discussion about methods for enhancing participation of lesbians in random digit dial telephone surveys. Results are useful for developing improved practices for conducting health surveys with lesbians.

Adolescent↗
PubMed2006

Comparison of rural and urban residents' implicit and explicit attitudes related to seeking medical care.

CONTEXT: The decision whether or not to consult a physician draws from a variety of attitudes within an individual's health schema. While rural Americans are in greater need of health care, many of them have fewer external resources than urbanites available to them. PURPOSE: The objective of this study was to elicit implicit and explicit attitudes related to seeking medical treatment for a condition described as fairly serious. Participants were asked to rate how often they comply with treatment regimens and practice good health habits. METHODS: The sample of rural (N = 586) and urban (N = 433) North Carolina residents was derived based on random-digit dialing. Multiple regression analyses were performed to investigate how attitudes associated with perceived compliance and health behaviors. FINDINGS: While rural and urban residents offered very similar responses, the associations between attitudes and behaviors were different. One healthy and 2 unhealthy schema patterns emerged. First, fear of hospitals was associated with effective compliance for rural residents and good health habits for urbanites. Second, affordability concerns were ascribed to rural community residents but seemed to reflect personally relevant implicit attitudes since they were associated with poor health adherence and habits for rural residents. Third, mistrust of doctors predicted low adherence for both groups and was also associated with poorer health habits for urbanites. With inconsistencies among implicit and explicit attitudes and behaviors, some residents seemed to be ambivalent about seeking health care.

Health Behavior↗
PubMed2005

Physician visits, hospitalizations, and socioeconomic status: ambulatory care sensitive conditions in a canadian setting.

OBJECTIVE: To determine whether rates of physician visits for ambulatory care sensitive (ACS) conditions are lower for people of low-socioeconomic status than of high-socioeconomic status in an urban population with universal health care coverage. DATA SOURCES/STUDY SETTING: Physician claims and hospital discharge abstracts from fiscal years 1998 to 2001 for urban residents of Manitoba, Canada. The 1996 Canadian Census public use database provided neighborhood household income information. The study included all continuously enrolled urban residents in the Manitoba Health Services Insurance Plan. STUDY DESIGN: Twelve ACS conditions definable using 3-digit ICD-9-CM codes permitted cross-sectional and longitudinal comparison of ambulatory visits and hospitalizations. Neighborhood household income data provided a measure of socioeconomic status. DATA COLLECTION/EXTRACTION METHODS: Files were extracted from administrative data housed at the Manitoba Centre for Health Policy. PRINCIPAL FINDINGS: All conditions showed a socioeconomic gradient with residents of the lowest income neighborhoods having both more visits and more hospitalizations than their counterparts in higher income areas. Six of nine conditions with a sufficient N showed individuals living in the lowest income neighborhoods to have significantly more ambulatory visits before hospitalization for an ACS condition than did those in the most affluent neighborhoods. Many conditions showed a gradient in rate of hospitalization even after controlling for the number of ambulatory care visits. CONCLUSIONS: In the Canadian universal health care plan, the poor have reasonable access to ambulatory care for ACS conditions. Ambulatory care may be more effective in preventing hospitalizations among relatively affluent individuals than among the less well off.

Adolescent↗
PubMed2003

Adjustments for non-telephone bias in random-digit-dialling surveys.

Telephone surveys are widely used in the U.S.A. for the study of health-related topics. They are subject to 'coverage bias' because they cannot sample households that do not have telephones. Although only around 5 per cent of households do not have a telephone, rates of telephone coverage show substantial variation by geography, demographic factors and socio-economic factors. In particular, lack of telephone service is more common among households that contain ethnic and racial minorities or that have lower socio-economic status with fewer opportunities for access to medical care and poorer health outcomes. Thus, failure to adequately account for households without telephones in health surveys may yield estimates of health outcomes that are misleading, particularly in states with at least moderate telephone non-coverage. The dynamic nature of the population of households without telephones offers a way of accounting for such households in telephone surveys. At any given time the population of telephone households includes households that have had a break or interruption in telephone service. Empirical results strongly suggest that these households are very similar to households that have never had telephone service. Thus, sampled households that report having had an interruption in telephone service may be used also to represent the portion of the population that has never had telephone service. This strategy can lead to a reduction in non-coverage bias in random-digit-dialling surveys. This paper presents two methods of adjusting for non-coverage of non-telephone households. The effectiveness of these methods is examined using data from the National Health Interview Survey. The interruption-in-telephone-service methods reduce non-coverage bias and can also result in a lower mean squared error. The application of the interruption-in-telephone-service methods to the National Immunization Survey is also discussed. This survey produces estimates for the 50 states and 28 urban areas. The interruption-in-telephone-service estimates tend be slightly lower than estimates resulting from poststratification and from another non-coverage adjustment method. The results suggest that the reduction in bias is greatest for variables that are highly correlated with the presence or absence of telephone service.

Bias↗
PubMed2000

Systems of evidence-based healthcare and personalised health information: some international and national trends.

In Europe, North America and elsewhere, growing interest has focussed on evidence-based healthcare systems, incorporating the deployment of practice guidelines, as a field of application for health telematics. The clinical benefit and technical feasibility of common European approaches to this task has recently been demonstrated. In Europe it is likely that, building on recent progress in electronic health record architecture (EHRA) standards, a sufficient state of maturity can be reached to justify initiation within CEN TC251 of a prestandards process on guideline content formats during the current 5th Framework of EC RT&D activity. There is now a similar impetus to agree standards for this field in North America. Thanks to fruitful EC-USA contacts during the 4th Framework programme, there is now a chance, given well-planned coordination, to establish a global consensus optimally suited to serve the world-wide delivery and application of evidence-based medicine. This review notes three factors which may accelerate progress to convergence: (1) revolutionary changes in the knowledge basis of professional/patient/public healthcare partnerships, involving the key role of the Web as a health knowledge resource for citizens, and a rapidly growing market for personalised health information and advice; (2) the emergence at national levels of digital warehouses of clinical guidelines and EBM knowledge resources, agencies which are capable of brokering common mark-up and interchange media definitions between knowledge providers, industry and healthcare organizations; (3) the closing gap in knowledge management technology, with the advent of XML and RDF, between approaches and services based respectively on text mark-up and knowledge-base paradigms. A current project in the UK National Health Service (the National electronic Library of Health) is cited as an example of a national initiative designed to harness these trends.

Artificial Intelligence↗
PubMedDate not supplied

The efficacy of screening for carcinoma of the prostate by digital examination.

Screening for carcinoma of the prostate by digital examination has been frequently advocated. In the United States prostate cancer is an important health problem for which current treatment is unsatisfactory; most patients with progressive disease die of the condition. While the pattern of spread of prostate cancer is understood, rates of progression of early disease are unknown. There has been no randomized clinical trial of digital examination in screening for prostate cancer; and thus, whether prognosis is definitely improved by early detection is unknown. Measures of test performance--test sensitivity and specificity--are unknown for an asymptomatic screened population. Interpreting the results of treatment for asymptomatic cases diagnosed by screening is difficult because of selection bias, lead time bias, and possible overdiagnosis of nonprogressive cancers. The limited cost-efficacy of routine digital examination of the prostate should be compared with the cost-efficacy of other routine health care in deciding about the use of this procedure.

Adult↗
PubMed1998

Standardisation in medical image management.

A medical image without the relevant associated data is of no value. What is relevant depends on the use which is to be made of the image. The associated data may be divided into groups associated with the patient, the image data (array size, data type), the image itself (e.g. acquisition method), the requested imaging procedure to which it belongs, graphical, numerical and time information associated with the images, relevant results of other medical procedures, etc. Images, digital images and the associated data must be managed in an efficient manner in order to deliver appropriate patient care. In order to realise fully the potential of digital imaging, digital image data must be transmitted from acquisition units and stored in such a way as to allow appropriate access to health care practitioners in the imaging department, hospital and community. Standards exist for the formatting and transmission of image and related data (Digital Imaging and Communications in Medicine (DICOM). NEMA PS 3.1-PS3.12, The National Electrical Manufacturers Association, Rosslyn, VA, 1992, 1993, 1995; Health Level Seven, An Application Protocol for Electronic Data Exchange In Healthcare Environment, version 2.2, Health Level Seven Inc., Ann Arbor, MI, 1994; Comite European de Normalisation, Technical Committee 251: Medical Informatics) although further work is required in order to improve interoperability. There is some overlap in current standards, thus an important area is the agreement on the scope of the work to be done by different bodies. Standards are lacking in the areas of image management and presentation. Strategies for the efficient use of a memory hierarchy to achieve satisfactory archiving and access must be developed and this depends on the existence of appropriate descriptive data fields. Specific issues exist regarding security of image data. Key areas requiring immediate work are the profiling of descriptive data elements according to different clinical application needs in order to improve interoperability and the development of strategies for evolution from legacy systems to modern networked systems. The best way forward is to consolidate and refine existing specifications.

Data Display↗
PubMedDate not supplied

Are two doctors better than one? Women's physician use and appropriate care.

This study examines nonelderly women's concurrent use of two types of physicians (generalists and obstetrician-gynecologists) for regular health care and associations with receipt of preventive care, including a range of recommended screening, counseling, and heart disease prevention services. Data are from the 1999 Women's Health Care Experiences Survey conducted in Baltimore, Maryland, using random digit dialing (N = 509 women ages 18 to 64). Key findings are: 58% of women report using two physicians (a generalist and an ob/gyn) for regular care; seeing both a generalist and an ob/gyn, compared with seeing a generalist alone, is consistently associated with receiving more clinical preventive services, including screening, counseling, and preventive services related to heart disease. Because seeing an ob/gyn in addition to a generalist physician is associated with receiving recommended preventive services (even for heart disease), the findings suggest that non-elderly women who rely on a generalist alone may receive substandard preventive care. The implications for women's access to ob/gyns and for appropriate design of women's primary care are discussed.

Adolescent↗
PubMed2006

Internet uses for health information seeking: A literature review.

BACKGROUND: With the widespread dissemination of the Internet throughout the world of health, it would be relevant to report on current knowledge about health information search on the Internet from the consumers' standpoint. METHODS: We conducted a bibliographical research over the past five years and distinguished between international and French studies. RESULTS: For a long time, the (mostly US) studies have been merely descriptive. The studies highlight that the factors associated with health searches on the Internet are similar to the factors underlying the digital divide. Consumer searches are deemed efficient although search skills are comparatively below standard. Attempts are underway to set up tools, circulate them widely, and ensure better quality information on the Internet. However, comprehension and literacy are still issues in some social groups. Regarding the impact on consumer health per se, a (positive) effect of the Internet seems to emerge but research should be continued. CONCLUSION: Many of the behaviors, uses or limits addressed in this paper pertain to any information search on the Internet but other problems or differences also occur in the specific area of health. Longitudinal investigations are needed, specifically to gain deeper insight into the impacts we have addressed, while rolling out a comprehensive approach to the temporal evolution of user practices and experiences. Specifically, the central issue is still to determine how (and for whom) the Internet alters information search behaviors and, in fine, to what extent this affects health behaviors and the recourse to healthcare.

Community Participation↗
PubMed2003

Associations of breast cancer risk factors with breast density in Hispanic women.

Although there has been much research on the factors associated with breast density, most studies did not include Hispanic women or relied on semiquantitative methods of assessing density. Using data from the Chicago Breast Health Project, which targeted Hispanic women and assessed density quantitatively using full-field digital mammography, we assessed cross-sectional associations of breast cancer risk factors with percentage of breast density. Between November 2000 and June 2002, 296 Hispanic women recruited from three community health centers in Chicago, Illinois completed a health and lifestyle questionnaire, had their height and weight measured, and underwent screening mammography. The average percentage of total breast area occupied by fibroglandular tissue was computed from each mammographic view. Associations of breast cancer risk factors with percentage of breast density were assessed using multivariate linear regression analyses. Overall, the mean percentage of breast density was 17.6%. In multivariate analysis, older age was associated with lower density (P = 0.03), and density was lower among postmenopausal than premenopausal women (beta = 5.2%; P = 0.002). Body mass index was significantly inversely related to percentage of breast density (P < 0.00001). Women currently taking hormone replacement therapy had a higher percentage of breast density (beta = 3.3%; P = 0.03). In premenopausal women, cigarette smokers had a marginally higher percentage of density (beta = 6.23%; P = 0.06) compared with nonsmokers, but there was no relationship for postmenopausal women. Other breast cancer risk factors were not associated with density. In summary, breast density was strongly and inversely associated with age, body mass index, and menopausal status, and positively associated with hormone replacement therapy use and cigarette smoking. Additional research focusing on relationships of other, potentially modifiable, factors with the extent of breast density is warranted to better understand the interindividual variability in density among Hispanic women.

Adult↗
PubMed2004

Participatory design and infrastructures for coordination and communication in interdisciplinary mobile health teams.

This paper reports on a current project that explores how wireless and mobile technologies, in this case Personal Digital Assistants (PDAs) and Tablet PCs, may be useful in clinical practices. In particular the support and practices for just-in-time coordination and communication among members in highly mobile health teams are focused. Their practice is related to just-in-time access to information for coordination of care and treatment related to, but different from, information traditionally stored in the patients' health records and clinical information systems (CIS). To facilitate discussion and participation among various stakeholders, and between organizational contexts and responsibilities, we developed four video scenarios. The paper describes how these scenarios can be used in an organizational development setting to facilitate analysis and design of tools mindful of the relationships between complex and interwoven infrastructures of communication on one hand and just-in-time aspects of a mobile clinical practice on the other.

Computers, Handheld↗
PubMed1997

Randomised trial of prostate cancer screening in The Netherlands: assessment of acceptance and motives for attendance.

OBJECTIVES: To assess motives for attending a randomised population based prostate cancer screening trial, and to assess acceptance of screening and invitation procedures. METHODS: First pilot of the European Randomised Study of Screening for Prostate Cancer (ERSPC; 1992/1993). Men aged 55-75 years, randomly selected from the population register of four city districts of Rotterdam, were invited by a single invitation for screening. Screening consisted of prostate specific antigen prescreening followed by either (1) digital rectal examination, transrectal ultrasound, and, on indication, biopsy, or (2) no additional screening. After screening, or in the case of non-attendance, a questionnaire was sent to a random sample of 600 attenders and 400 non-attenders, with a reminder after three weeks. OUTCOME MEASURES: In both attenders and non-attenders: knowledge of prostate cancer, attitudes towards screening, motives for attending, procedural aspects and sociodemographic characteristics. In attenders, acceptance of screening procedures. RESULTS: The response rate for the questionnaire was 76%: 94% in attenders and 42% in non-attenders. The main reasons for attending were expected personal benefit (76%) and scientific value (39%), and those for not attending were absence of urological complaints (41%) and anticipated pain or discomfort (24%). Uptake of screening was 32%, which increased to a sustained 42% in following years. Attenders, compared with non-attenders, were significantly younger, more often married, better educated, and had higher perceived health status, more knowledge about prostate cancer, and a more positive attitude towards screening. Information materials and invitation procedures were well accepted (high report marks and satisfaction, and 95% would attend for rescreening). A single prostate specific antigen determination was liked less than a combination of all three screening modalities. CONCLUSIONS: (1) The main reasons for attending are personal benefit and science, and those for not attending were absence of urological complaints and anticipated pain or discomfort; (2) knowledge, attitudes, and motives for attending are comparable with other screening programmes; hence, for population based prostate cancer screening, known health promotional aspects should be carefully considered; (3) prostate specific antigen, digital rectal examination and transrectal ultrasound are acceptable to attenders.

Aged↗
PubMed2001

Risk factors for lyme disease in Chester County, Pennsylvania.

OBJECTIVE: To identify factors associated with increased or decreased risk of infection for Lyme disease in Chester County, Pennyslvania. METHODS: The authors designed an unmatched case-control study involving 294 incident cases reported to the Chester County Health Department in 1998 and 449 controls selected by random digit dialing. All case and control participants were interviewed by telephone. RESULTS: Age is a risk factor for Lyme disease for groups aged 10-19 years old and 50 years or older. Sex was not a risk factor. Incidence of Lyme disease in a rural setting was three times the incidence in an urban setting. Increased risk also was associated with living in single family homes, homes with yards or attached land, woods on the land, signs of tick hosts seen on the land, and homes within 100 feet of woodland. Gardening for more than four hours per week was also a risk factor, but most other outdoor activities were not. Twice as many participants took protective measures against tick bites before outdoor employment than those who merely ventured into the yard or land associated with the home. Only checking for ticks during outdoor activity and the use of repellents prior to outdoor activities outside the yard were unequivocally associated with a reduced risk of Lyme disease. CONCLUSIONS: It is important to increase public awareness about the risk of acquiring Lyme disease from ticks in the immediate environment of the home.

Adolescent↗