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Biomedical subjects

A B Stevens

Publications and source records attributed to A B Stevens.

At least 19 recordsLinked to original sources
PubMed2005

Factors affecting influenza vaccine uptake among health care workers.

BACKGROUND: In 2000, the UK Departments of Health recommended influenza immunization to employees directly involved in patient care. Uptake of this immunization had tended to be variable and usually low. AIMS: To assess personal and organizational factors associated with influenza immunization uptake among Health Care Workers (HCWs). METHODS: A cross-sectional survey of all HCWs within the Health and Social Care Trusts in Northern Ireland and a parallel-group study of nursing staff within Elderly Care using self-administered questionnaires. RESULTS: Of 203 nurses working in elderly care units 76(37%) were immunized and 127(63%) declined. Almost 70% of those not immunized perceived themselves to be 'healthy' and gave this reason for declining immunization. Nurses were more likely to be immunized by a factor of four if they believed there was benefit for healthy HCWs, three if they felt at-risk of contracting influenza and nine on a recommendation from the occupational health (OH) unit. Fifteen OH units participated in a survey of HCWs at the time of immunization. Five thousand two hundred and thirty (9.7%) HCWs were immunized. Increased uptake was correlated with immunization in area of work (r=0.74, P=0.02) and when provided out of hours (r=0.83; P<0.001) and by a factor of two with individual targeting of availability (P<0.001) and when individuals had been previously immunized (P<0.001). CONCLUSION: Uptake of influenza immunization is low. Attitudes to one's health and to the value of influenza immunization affect the uptake as does the delivery of the immunization programme.

Adult↗
PubMed2004

Measurement of leisure time satisfaction in family caregivers.

Caregiving is known to limit participation in a variety of roles. Leisure roles are increasingly recognized as important for the well-being of older adults. Little is known, however, about the impact of caregiving on leisure activities, and existing measures are of limited utility in caregiving research. We developed the Leisure Time Satisfaction (LTS) measure to allow further study of the impact of caregiving on caregivers' leisure time satisfaction, the role of leisure in understanding the caregiving process, and whether caregiving interventions improve leisure time satisfaction. The six-item LTS measure shows excellent psychometric properties, including internal consistency, a single factor structure, and convergent validity. Psychometric features are robust across diverse groups of caregivers, including subgroups varying by race/ethnicity and relationship to the care recipient. The LTS measure appears to be a promising tool for inclusion in caregiving research.

Aged↗
PubMed2002

Association of life events and psychological distress in family caregivers of dementia patients.

Relationships between life events and psychological distress were investigated for 197 dementia caregivers and 218 non-caregivers. Participants indicated which events on the Louisville Older Persons Events Scale they had experienced over the past six months. Life events were then classified as associated or unassociated with care-giving using differences in incidence rates between caregivers and non-caregivers. Primary care-giving stressors and associated life events were most predictive of psychological distress among caregivers. Among non-caregivers, unassociated negative life events were the strongest predictors of depression and life satisfaction. Implications for the assessment of life events and caregiver interventions are discussed.

Caregivers↗
PubMed2002

Sickness absence due to influenza.

In addition to its recognized health effects, influenza has socio-economic consequences, most notably sickness absence and associated work disruption. It may account for 10-12% of all sickness absence from work. Data on the impact of influenza on work are limited. Most research has assessed the impact of an intervention, usually influenza immunization. Within the available literature, there are five randomized controlled trials in the workplace that have assessed the effectiveness of influenza immunization as an intervention: two in the general working population and three in the health sector. If the benefit desired is a reduction in sickness absence as a cost-effective measure, the likely outcome is a modest gain in years when incidence of influenza is increased in the community. There are some distinctive factors in the health care industry: health care workers may exhibit different absence behaviour, they may be more exposed to infection at work and they may pose a risk as a source of nosocomial infection. From the occupational health perspective, how do we best inform employers currently? The cost-effectiveness case has not been absolutely proven. More research appears necessary, including assessment of those factors that influence uptake of influenza immunization. In the interim, a targeted approach to certain job categories may be the way forward.

Absenteeism↗
PubMed2000

Hepatitis C virus: an important occupational hazard?

Infection with Hepatitis C virus (HCV) is estimated to affect 3% of the world's population and is an important cause of liver disease. It is most commonly transmitted by percutaneous exposure. Although current evidence does not suggest an increased prevalence of HCV infection among healthcare workers, transmission of infection following occupational exposure has been demonstrated. An average transmission rate of 1.8%, following percutaneous injury, has been reported. The risk of transmission is higher from patients with viraemia, as measured by a positive polymerase chain reaction for HCV RNA. After exposure to HCV, healthcare workers should be actively followed up, initially using a test to detect viral RNA. This may facilitate earlier diagnosis and treatment. Recent reports in the UK, of transmission of infection to patients from HCV infected healthcare workers, have prompted a review of the appropriateness of HCV infected individuals undertaking exposure prone procedures.

HIV Infections↗
PubMed1999

Effective behavioral interventions for decreasing dementia-related challenging behavior in nursing homes.

This paper provides a selective review of behavioral intervention research aimed at successfully decreasing dementia-related challenging behaviors in nursing homes. The authors include separate discussions of behavioral excesses (disruptive vocalization, wandering, physical and verbal aggression) and deficits (excess dependency, therapeutic activities, social interaction/communication). Descriptions of interventions used to address each behavior problem are followed by methodological evaluations of the research. Discussions are augmented by inclusion of the authors' ongoing intervention research. The paper concludes with a description of a comprehensive program for teaching behavior management skills to nurse aides and a motivational system for maintaining the performance of these skills over the long term.

Aged↗
PubMed1998

Teaching and maintaining behavior management skills with nursing assistants in a nursing home.

This article describes a nursing staff training program in basic behavior management skills and a formal staff management system to encourage the application of these basic skills on the nursing unit. Behavioral skills training consists of a 5-hour in-service followed by three weeks of on-the-job training to ensure accurate application of behavior management skills. Following training, a staff management system is used to facilitate long-term use of the skills. Components of the staff management system include supervisory monitoring of the nursing assistants (NAs) by licensed practical nurses (LPNs), NA self-monitoring, verbal and written performance feedback, and incentives.

Alabama↗
PubMed1997

Vision screening, eye examination and risk assessment of display screen users in a large regional teaching hospital.

In January 1993 the Royal Group of Hospitals Trust, which employs approximately 5000 staff, implemented the Health and Safety (Display Screen Equipment) Northern Ireland Regulations (1992). During 1994 all regular display screen equipment users were offered a vision screening test. In total 571 employees were screened using computerized vision screening software (City Visual Systems Ltd). Risk assessments were completed for 293 display screen work-stations. One hundred and twelve full eye examinations, carried out by optometrists, were performed on those who failed vision screening and on those who specifically requested an optometric assessment. Results indicate that whereas the proportion of users experiencing visual and general symptoms differed markedly from department to department (28-82%), the median number of individuals failing the screening test was 25% (range 9-40%). Those involved in uninterrupted display screen equipment work for prolonged periods reported visual and general work-related symptoms twice as frequently as those who spent less time working with DSE. The outcome of full eye examinations confirmed that less than 5% of display screen users required spectacles solely for display screen use. Work-station analysis indicated that ergonomic problems were common. The authors conclude that the successful management of health risks from display screen equipment requires simultaneous attention to work-place design, working patterns and eye care.

Adolescent↗
PubMed1995

Elders' acceptability ratings of behavioral treatments and pharmacotherapy for the management of geriatric behavioral disturbances.

The management of geriatric behavioral disturbances presents a challenge for both caregivers and care receivers. Previously, we have investigated caregivers' and health care professionals' perceptions of the acceptability of behavioral treatments and pharmacotherapy. However, the perceptions of the potential or actual recipients of these interventions are equally important. In this study, vignette methodology assessed elderly individuals' acceptance of two behavioral treatments and one pharmacologic intervention using Kazdin's Treatment Evaluation Inventory. Respondents assigned the highest treatment acceptability ratings to behavioral treatments and the lowest to drug therapy. The place of patient residence described in the vignettes (community or nursing home) mediated treatment acceptability ratings.

Aged↗
PubMed1994

The health status of an ambulance service.

The purpose of the study was to evaluate the current health status of male ambulance personnel based in Belfast, taking the opportunity to compare results with those from a comparable local survey of the general population. Risk factors for coronary heart disease were assessed. Ninety-three men were studied. Blood pressure values were significantly higher (P < 0.05) in the present study than in a comparable local survey of the general population, with 23 per cent of systolic values being over 140 mmHg and 27 per cent of diastolic readings being over 90 mmHg. The incidence of self-reported smoking was also higher in the ambulance service (36 per cent) compared with the local population (31 per cent). Computation of body mass indices for ambulancemen showed that 52 per cent of personnel fell outside the acceptable range of 20-25 kg/m2 with 10 per cent being greater than 30 kg/m2, recognized as the threshold of clinical obesity. With regard to serum cholesterol, 52 per cent of personnel exceeded the desirable threshold of 5.2 mmol/l, while 18 per cent were above 6.4 mmol/l. In addition, the high density lipoprotein fraction was significantly lower (P < 0.05) in the ambulancemen compared with the general population (mean +/- SEM: 1.10 +/- 0.3 vs 1.18 +/- 0.01, respectively). Although 54 per cent of the sample claimed to be physically active, only 35 per cent reportedly took sufficient exercise to be of benefit to their health. Cardiorespiratory fitness was significantly higher in this group. The ambulance service nationally remains the only emergency service without a strategy for health and fitness.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1993

Effects of a 10-week exercise intervention programme on exercise and work capacities in Belfast's ambulance-men.

The objective of the present study was to investigate the occupational benefits of an exercise intervention programme, including changes in physical working capacity and other physical fitness measures on a group of Belfast ambulancemen. Physical training was performed twice weekly for 10 weeks and consisted primarily of indoor soccer and circuit-training sessions. Both experimental (n = 8) and control subjects (n = 6) were assessed for height (HT), weight (WT), body composition (percentage fat), standing broad jump (SBJ), flexibility (Flex), and sit-up performance (SU). The experimental group was further assessed for blood pressure (BP), hand grip strength (HGS), maximal oxygen consumption (VO2 max), end lactate concentration (EL), anaerobic threshold (AT) and leg strength (LS). Working capacity was also assessed during a staged emergency incident, using a portable telemetric gas analyser. Significant changes in the experimental group were found following training for Flex, SU, SBJ, VO2 max (all P < 0.05), EL and AT (P < 0.01). A significant drop in the metabolic cost of the simulated emergency incident was also noted following training. No significant differences were found for the control group over the experimental period. The present study indicated that a twice-weekly exercise intervention programme was effective in improving the physical fitness of Belfast's ambulancemen. Such a programme could prove cost-effective by increasing work capacity and decreasing absenteeism related to musculoskeletal injury.

Ambulances↗
PubMed1991

Physical fitness and occupational demands of the Belfast ambulance service.

The objectives of this study were to evaluate the current fitness of an area ambulance service based in Belfast and to quantify the physiological demands of accident and emergency work. From a total staff of 230, 105 (46%) volunteered to undergo a series of fitness tests subject to health state. Results based on body mass indices showed that 52% of subjects could be classified as overweight and 10% of subjects as obese. Fitness levels were similar to other comparable samples and showed the expected but not inevitable decrease with age. A simple work related task (walking at 6 km/h) performed in the laboratory showed that 54% of men over 40 years of age and 24% under 40 found it taxing. This would favour selection for accident and emergency work on the basis of functional capacity rather than chronological age. Accident and emergency work consisted of long periods of inactivity interspersed with shorter periods of relatively intense activity, often above the anaerobic threshold. Lactate concentrations measured during a staged emergency incident also suggested that personnel may work at intensities exceeding their anaerobic threshold. The incorporation of physical fitness standards in the ambulance service may be appropriate and consideration should be given to a reduced age of retirement.

Adult↗
PubMed1990

The assessment of hepatic and peripheral insulin sensitivity in hypertriglyceridemia.

Peripheral insulin resistance is a common finding in hypertriglyceridemia. However, hepatic insulin sensitivity has rarely been investigated. We measured hepatic and peripheral insulin sensitivity in eight nondiabetic, nonobese hypertriglyceridemic subjects (HT) with raised triglyceride concentrations (4.3 +/- 0.6 mmol.L-1, mean +/- SEM) and eight age-, sex-, and weight-matched control subjects (C) with normal triglyceride concentrations (1.2 +/- 0.2 mmol.L-1). Insulin secretion was assessed during a 75-g oral glucose tolerance test (OGTT). Glucose turnover was determined using 3(3H) glucose in the postabsorptive state and during euglycemic glucose clamps at insulin infusion rates of 0.25 and 1.0 mU.kg-1.min-1. At identical fasting glucose concentrations (HT, 5.2 +/- 0.2; C, 5.2 +/- 0.2 mmol.L-1), the glucose responses to OGTT were similar in both groups. Fasting plasma insulin (HT, 8.3 +/- 1.2; C, 4.6 +/- 0.4 mU.L-1; P = .02), and C-peptide (HT, 1.7 +/- 0.2; C, 1.1 +/- 0.1 microgram.L-1; P = .006) concentrations were higher in hypertriglyceridemic subjects. The insulin and C-peptide responses to OGTT were greater in hypertriglyceridemic subjects (insulin, P = .005; C-peptide; P = .01). Hepatic glucose appearance in the postabsorptive state was similar (HT, 11.4 +/- 0.3; C, 10.9 +/- 0.7 mumol.kg-1.min-1; NS). At low insulin concentrations (HT, 20.7 +/- 1.4; C, 20.5 +/- 1.4 mU.L-1), hepatic glucose appearance was equally suppressed (HT, 9.6 +/- 0.9; C, 10.5 +/- 1.3 mumol.kg-1.min-1; NS).(ABSTRACT TRUNCATED AT 250 WORDS)

Absorption↗
PubMed1989

Motor vehicle driving among diabetics taking insulin and non-diabetics.

OBJECTIVE: To determine whether rates of road traffic accidents were higher in diabetics treated with insulin than in non-diabetic subjects. DESIGN: Controlled, five year retrospective survey. SETTING: Diabetic, dermatology, and gastroenterology outpatient clinics. PATIENTS: 596 Diabetics treated with insulin (354 drivers) aged 18-65 attending two clinics and 476 non-diabetic outpatients (302 drivers). MAIN OUTCOME MEASURES: Rates of accidents in diabetic and non-diabetic subjects. RESULTS: A self completed questionnaire was used to record age, sex, driving state, and rates of accidents and convictions for motoring offences among diabetic and non-diabetic volunteers. For the diabetic volunteers further information was obtained on treatment, experience of hypoglycaemia, and declaration of disability to the Driving and Vehicle Licensing Centre and their insurance company. Accident rates were similar (81 (23%) diabetic and 76 (25%) non-diabetic drivers had had accidents in the previous five years). A total of 103 diabetic drivers had recognised hypoglycaemic symptoms while driving during the previous year. Only 12 reported that hypoglycaemia had ever caused an accident. Overall, 249 had declared their diabetes to an insurance company. Of these, 107 had been required to pay an increased premium, but there was no excess of accidents in this group. CONCLUSIONS: Diabetic drivers treated with insulin and attending clinics have no more accidents than non-diabetic subjects and may be penalised unfairly by insurance companies.

Accidents, Traffic↗
PubMed1989

Psychomotor performance and counterregulatory responses during mild hypoglycemia in healthy volunteers.

The effect of mild hypoglycemia on psychomotor performance and counterregulatory responses was studied among 12 healthy volunteers. Each volunteer received two modified hyperinsulinemic glucose clamps. One morning, plasma glucose was held constant at euglycemic levels (4.9 mM) for 95 min, and another morning, it was lowered over 35 min and then held constant at hypoglycemic levels (3.4 mM) for 60 min. A battery of psychomotor tests and a questionnaire assessing hypoglycemic symptoms were administered before and repeated during the last 30 min of each clamp. The questionnaire and three selected psychomotor tests were also administered repetitively during the 1st h of each clamp. During the hypoglycemic studies, a rise was seen in plasma epinephrine and pancreatic polypeptide at 45 min. An increase in symptom scores was first recorded at 50 min during the hypoglycemic studies [median 4 (range 0-13) vs. 2 (5-6), P less than .05]. Performance was impaired on two psychomotor tests included in the battery. One was the trail making test on fine motor performance (-19.3 +/- 4.2 targets/min, mean +/- SE vs. 1.2 +/- 4.8 targets/min, P less than .05), and the other was the digit-symbol substitution (DSS) test on information processing and memory (18 +/- 3 vs. 29 +/- 4 symbols/min, P less than .03). Of the tests administered during the 1st h, performance was impaired on the DSS. This impairment became significant at 45 min (14 +/- 4 vs. 22 +/- 4 symbols/min, P less than .005). In conclusion, mild hypoglycemia selectively impairs psychomotor performance in healthy volunteers but not before the onset of glucose counterregulation and warning symptoms.

Adult↗