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Epidemiology of burn injuries in Singapore from 1997 to 2003.

The Singapore General Hospital (SGH) Burn Centre receives more than 93% of burn cases occurring in Singapore. The Centre also received patients from the Southeast Asian region. The collection and analysis of burn epidemiology data in recent years from Singapore would provide insights into new prevention/management strategies in terms of population profile and economic activities. Data pertaining to burn patients admitted to SGH Burn Centre between January 1997 and December 2003 were studied retrospectively in terms of admissions' demographics, extent of burn (TBSA), causes of burns, length of hospital stay (LOS) and mortality. A total of 2019 burn patients were admitted with an annual admission of 288. This presented an incidence rate for burn injury (with admission) of 0.07 per 1000 general population. The male to female ratio is 2.2:1 and the mean age of admission is 32.5years. The mean extent of burn was 11.5% and patients with burn size 10% TBSA and less made up the majority of admissions at 70.7% while patients with burn size 30% TBSA and more made up 8.2%. The most common cause of burn injury is scald at 45.6% followed by flame at 35.2%. The overall mean LOS and mortality are 10.8days and 4.61%, respectively. An annual trend of falling mortality rate for admissions with burn size >30% TBSA was observed-60% in year 2000 to 30% in 2003. This is a result of massive early excision and grafting of severe burn patients. 17.6% of patients were children of 12years and below, showing a 11.9% reduction from previous study in the 80s. This is consistent with the city's demographics of falling fertility rate and improved living and social conditions. Occupational burn admissions account for 33.4% of total admissions, a reduction of 11.6% from a study in the early 90s. Occurrence of occupational flame burns decreased by 9.5% due to an improvement in fire prevention and management of the industrial sectors. However, chemical burns increased by 12.6% as the chemical sector in Singapore grew at a rate of 10% from year 1995 to 2000. Singapore has also derived much experience from the management of mass casualties resulting from SQ006 plane crash and bomb blasts in Bali as well as in Jakarta. In total, 315 victims were treated (4 from SQ006, 16 from Bali and 15 from Jakarta) with 1 mortality. The burns admissions in Singapore has a profile consistent with population demographics. Scald is the major cause of burns and most of these injuries are preventable. While the industries have made inroads into good fire prevention and management, management of chemical burns and other occupational hazards will continue to be scrutinized and advice given in terms of regulations, work processes and personal protective gears.

Adolescent↗

Cancer in the older person.

Cancer in the older person is an increasingly common problem, due to the progressive prolongation of the life-expectancy of the Western population. This article reviews the mechanisms associating aging and cancer, age-related changes in cancer biology, assessment of the older person to estimate life-expectancy, treatment tolerance, and medical and social conditions that may interfere with cancer treatment, effectiveness of cancer prevention and cancer treatment in older individuals. A comprehensive geriatric assessment (CGA) is commonly used to predict life-expectancy and functional reserve and to unearth conditions that may jeopardize cancer prevention and treatment. In the interest of cost and time, shortened forms of CGA are being explored. Chemoprevention of cancer is a promising form of prevention that at present has no conclusive clinical indications. Early diagnosis of breast and colon cancer through screening of asymptomatic patients at risk may be beneficial for individuals with a life-expectancy of 5 years or longer. Early detection of lung cancer in ex-smokers is undergoing clinical trials, as this disease is becoming more and more common. Age should not prevent appropriate treatment of cancer in older individuals, especially in those with adequate life-expectancy and functional reserve. The National Cancer Center Network (NCCN) has issued a series of guidelines to minimize the toxicity and promote the effectiveness of cancer in older patients. Important interventions include prevention of neutropaenic infections with filgrastim and peg-filgrastim, prevention of anaemia with epoietin or darbepoietin, and prevention and early management of mucositis.

Aged↗

Historical change of heavy metals in urban soils of Nanjing, China during the past 20 centuries.

Two typical areas, including once commercial and residential quarters of Nanjing, China, were studied by investigating soil properties especially heavy metals of soils in various cultural layers formed in different Chinese Dynasties. The age of the soil profiles was dated by both archaeological and 14C chronological methods. The results showed that urban soils in the old commercial/workshop quarter of Nanjing were generally contaminated by heavy metals Cu, Zn, Pb, but their concentration levels varied significantly among the cultural layers formed in different dynasties. The substantial increase of heavy metals appeared in three historical periods, i.e., South Dynasty (222-589 AD), the earlier Ming (1368-1644 AD) and the late Qing (1644-1912 AD) in one area. The tremendous input and storage of heavy metals in soils was explained by the primitive smelting and the strengthened metal processing activities, which might be due to the requirement of weapon making or other industries, in the changing social conditions of the corresponding periods. Soils in the once noble political, cultural centers did not show significant increase of heavy metals. The difference in the distribution pattern of heavy metals revealed the contrasting history of the site uses. The change of contaminant level in soils is believed to be a reflection of various human activities in the city during the past 20 centuries.

China↗

Behaviorally induced synaptogenesis and dendritic growth in the hippocampal region following transient global cerebral ischemia are accompanied by improvement in spatial learning.

Reports have shown that damage to the adult brain can result in adaptive changes in regions adjacent or surrounding the site of the principal injury and that these changes may be modulated by rehabilitation training. In this study, we examined the influence of complex environment housing as a rehabilitation strategy on ischemia-induced synaptic and dendritic changes in the hippocampus. Thirty-six adult male Wistar rats were included in the study and assigned to either transient global cerebral ischemia or sham group. Following ischemic or sham surgery, rats were randomized to either complex environment housing (EC) or social condition (SC, paired housing) group during the rehabilitation period. Following 14 days of rehabilitation, rats were tested in the water maze. Our results showed that: (1) ischemic injury and EC housing were able to independently influence synaptogenesis and dendritic growth in the hippocampal area adjacent to the site of injury, and (2) EC housing-induced synaptic and dendritic changes were accompanied by enhanced functional recovery after transient global cerebral ischemia. These data suggest that behavioral experience during the rehabilitation period may be able to alter the neuronal circuitry in the surrounding region where primary neuronal damage was seen and that such modification may have contributed to functional improvement.

Analysis of Variance↗

Torture and its sequel--a comparison between victims from six countries.

The aim of the study was to compare torture victims from six different nations and analyse differences and similarities. From the files of the Centre for Trauma Victims in Stockholm (KTC), 160 patients were selected: 53 patients from Bangladesh, 21 from Iran, 16 from Peru, 24 from Syria, 25 from Turkey, and 21 from Uganda. The data was classified into: (i) information about social conditions and circumstances pertaining to alleged torture, (ii) type of trauma and torture methods, and (iii) acute and late sequel to torture. Descriptive and non-parametric statistics were used in the analyses. There was a strong male dominance in all but the Ugandan group where 43% were women. The majority in all but the Turkish group had college exams and/or university studies. Over 84% were members of a political organisation except in the Iranian and Syrian groups, where more than 40% had no political affiliation. The majority in all groups had travelled to Sweden alone to apply for asylum, but most refugees from Turkey, Iran, and Syria had close relatives already living in Sweden. The stories of circumstances and torture methods were similar within each group but differed a great deal between groups. Typically, in Bangladesh, Peru, and Turkey, the periods under arrest were short: from a few hours to 3 days. In Iran, Uganda, and Syria, the time in custody varied from several months to several years. A prison sentence preceded by trial was common only in Iran. Many patients, especially from Bangladesh and Turkey, had been arrested several times. Sensory deprivation by isolation and blindfolding was common in all countries except Uganda and Peru. Beating with fists, sticks, truncheons, etc. were reported in 100% in every group. In Bangladesh, police batons (lathi) were used more commonly than in any other group. Whipping with electric cords occurred frequently only in Iran and Syria. Rape was most often reported among the Ugandans. Genital torture was frequently alleged by patients from Bangladesh and Turkey. Suspension was common in all countries except for Uganda. Falaka, i.e. beating of the soles, and electric torture were common (>60%) in Bangladesh, Iran, Syria, and Turkey. Sharp injuries inflicted with knives and bayonets were often seen among the Bangladeshi and Ugandans. Burning injuries due to cigarettes were commonly seen only in patients from Bangladesh. Some methods were found to be almost exclusive for each country: "water treatment" (Bangladesh), the "tyre" (Syria), "telephono" and "submarino" (Peru). The sequel of torture differed in some respects between groups. Fractures were more common among Iranians. Patients from Uganda and Bangladesh had numerous scars. Subjectively reported symptoms were most frequent among Bangladeshi, especially joint pain and ear, nose, and throat symptoms and least frequent among Ugandans. PTSD diagnosed on the basis of a psychiatric interview and psychological tests was found in 69-92% of patients in all groups. The study shows significant differences between countries regarding circumstances, torture methods, and sequel to torture. This knowledge is of value to forensic specialists documenting alleged torture and essential for fair and valid forensic statements.

Adult↗

Elimination rates of breath alcohol.

Legal driving limits are set coequally with 0.5 g/L blood alcohol concentration (BAC) or 0.25 mg/L breath alcohol concentration (BrAC) in Austria as well as in other European countries. As mostly some time elapses between BrAC measurement and driving offence, a back calculation of alcohol concentrations is often required. The calculation of hourly BrAC elimination rates can thereby help to avoid unnecessary variances. A study with 59 participants was performed under social conditions. BrAC was determined with the legally accredited Alcotest 7110 MK III A every 30 min, and concomitantly venous blood samples were drawn. Five hundred and four BrAC/BAC value pairs were evaluated. The overall mean peak BrAC was calculated with 0.456 mg/L (+/-0.119 mg/L standard deviation). The mean hourly BrAC elimination rate was overall determined with 0.082 mg/L per h (0.050-0.114, 95% range). Mean rate of females (0.087 mg/L h(-1)) and the according 95% limits were statistically significantly higher than of males (mean rate 0.078 mg/L h(-1), p<0.04). Our results confirm the possibility to implement hourly BrAC elimination rates, provided that adequate statistical ranges and basic forensic scientific rules that have been set up for alcohol back calculations are observed.

Adult↗

Systems modeling in support of evidence-based disaster planning for rural areas.

The objective of this communication is to introduce a conceptual framework for a study that applies a rigorous systems approach to rural disaster preparedness and planning. System Dynamics is a well-established computer-based simulation modeling methodology for analyzing complex social systems that are difficult to change and predict. This approach has been applied for decades to a wide variety of issues of healthcare and other types of service capacity and delivery, and more recently, to some issues of disaster planning and mitigation. The study will use the System Dynamics approach to create computer simulation models as "what-if" tools for disaster preparedness planners. We have recently applied the approach to the issue of hospital surge capacity, and have reached some preliminary conclusions--for example, on the question of where in the hospital to place supplementary nursing staff during a severe infectious disease outbreak--some of which we had not expected. Other hospital disaster preparedness issues well suited to System Dynamics analysis include sustaining employee competence and reducing turnover, coordination of medical care and public health resources, and hospital coordination with the wider community to address mass casualties. The approach may also be applied to preparedness issues for agencies other than hospitals, and could help to improve the interactions among all agencies represented in a community's local emergency planning committee. The simulation models will support an evidence-based approach to rural disaster planning, helping to tie empirical data to decision-making. Disaster planners will be able to simulate a wide variety of scenarios, learn responses to each and develop principles or best practices that apply to a broad spectrum of disaster scenarios. These skills and insights would improve public health practice and be of particular use in the promotion of injury and disease prevention programs and practices.

Decision Making↗

Relationships between income, subjective health and caregiver burden in caregivers of people with dementia in group living care: a cross-sectional community-based study.

BACKGROUND: Family caregivers of relatives with dementia report higher level of psychological distress than other caregivers and report their self-related health as poorer than that of comparison groups. AIMS AND OBJECTIVES: The purpose of the study was to examine characteristics of family caregivers and to assess whether income, subjective health, age and relationship were associated with the burden of care they experienced. SETTING: Group living units in southern Sweden. PARTICIPANTS: Fifty caregivers who served as informal caregivers of relatives with dementia in group living care. DESIGN: Interviews regarding economic and social conditions and well-evaluated scales for health and caregiver burden (CB) were used. RESULTS: The majority of the family caregivers were adult children, and twice as many were female than were males. The investigation showed that total burden, strain and disappointment, adjusted for health and age, were related to income. Disappointment showed a relation to subjective health. The adult children showed a significantly higher degree of total burden, irrespective of age, compared to other family caregivers. Low income was associated with a higher degree of burden among adult children. However, elderly participants experienced less of burden than younger ones. CONCLUSION: Our findings indicate that caregivers with low health profile and low income, especially adult children, are associated with higher CB. RELEVANCE TO CLINICAL PRACTICE: People with coexisting risk factors (low income, low perceived health) are the ones who may benefit most from health-oriented interventions.

Adaptation, Psychological↗

Perceived smoking norms, socioenvironmental factors, personal attitudes and adolescent smoking in China: a mediation analysis with longitudinal data.

PURPOSE: To gather information on inter-relationships among risk factors affecting adolescent smoking for tobacco control in China, the world's largest tobacco producer and consumer. METHOD: Longitudinal data were collected six months apart in 2003 from 813 students in grades 7, 8, 10, and 11 from two schools in Beijing, China. Linear regression was used to assess both the direct effect from predictor variables (smoking among influential others, pro-tobacco media, and attitudes toward smoking) on cigarette use and the indirect effect mediated through the perceived smoking norms (percentage of smokers among peers). RESULTS: Among the 803 subjects (mean age of 15.5 years, SD = 1.7; 52.1% female), 18.3% of males and 1.7% of females smoked in the past 30 days. Smoking among influential others (best friends, father, mother, male teachers, female teachers, and adults in general) and perceived positive psychological and social rewards from smoking at baseline were associated with number of cigarettes smoked at follow-up, whereas exposure to pro-tobacco media was not significantly associated with smoking. The mediated effect was greater for adult smoking (70% to 90%) than for best friend smoking (11% to 16%). CONCLUSION: Smoking among influential others and attitudes toward smoking influence adolescent smoking both directly and indirectly. The finding of the indirect effect mediated through perceived smoking norms expands our knowledge on smoking etiology. Effective adolescent smoking intervention programs in China need to include a component targeting adult smoking to reduce perceived smoking norms.

Adolescent↗

Changes in seroprevalence to four herpesviruses over 30 years in Swedish children aged 9-12 years.

BACKGROUND: Changing social conditions and life-styles in Sweden may have affected the spread of varicella-zoster virus (VZV), herpes simplex virus (HSV), cytomegalovirus (CMV), and Epstein-Barr virus (EBV). OBJECTIVES: To study possible changes over 30 years in prevalence of antibodies against VZV, HSV, CMV, and EBV in Swedish children, using modern serological methods. STUDY DESIGN: Serum samples from 819 Swedish children who were 9-12 years old in 1967-1968, in 1977-1978 (two cohorts), and in 1997, respectively, were examined. IgG antibodies against VZV, HSV, and CMV were measured by well validated enzyme-linked immunosorbent assays and against EBV by indirect immunoflourescense. RESULTS: The seropositivity for VZV for 9-12 years old children was 50% in 1967-1968, 74-82% in 1977-1978, and 98% in 1997. The corresponding figures were 31%, 53%, 50%, and 58% for CMV, 35%, 35%, 32%, and 38% for HSV, and 64% in 1967-1968 and in 1977-1978 (both cohorts), and 62% in 1997 for EBV. CONCLUSIONS: The seroprevalence for VZV increased significantly from 1967-1968 to 1997, and there was also a significant but smaller increase in the CMV seroprevalence, while seroprevalence to HSV and EBV remained relatively stable.

Antibodies, Viral↗

An approach for delineating drinking water wellhead protection areas at the Nile Delta, Egypt.

In Egypt, production has a high priority. To this end protecting the quality of the groundwater, specifically when used for drinking water, and delineating protection areas around the drinking water wellheads for strict landuse restrictions is essential. The delineation methods are numerous; nonetheless, the uniqueness of the hydrogeological, institutional as well as social conditions in the Nile Delta region dictate a customized approach. The analysis of the hydrological conditions and land ownership at the Nile Delta indicates the need for an accurate methodology. On the other hand, attempting to calculate the wellhead protected areas around each of the drinking wells (more than 1500) requires data, human resources, and time that exceed the capabilities of the groundwater management agency. Accordingly, a combination of two methods (simplified variable shapes and numerical modeling) was adopted. Sensitivity analyses carried out using hypothetical modeling conditions have identified the pumping rate, clay thickness, hydraulic gradient, vertical conductivity of the clay, and the hydraulic conductivity as the most significant parameters in determining the dimensions of the wellhead protection areas (WHPAs). Tables of sets of WHPAs dimensions were calculated using synthetic modeling conditions representing the most common ranges of the significant parameters. Specific WHPA dimensions can be calculated by interpolation, utilizing the produced tables along with the operational and hydrogeological conditions for the well under consideration. In order to simplify the interpolation of the appropriate dimensions of the WHPAs from the calculated tables, an interactive computer program was written. The program accepts the real time data of the significant parameters as its input, and gives the appropriate WHPAs dimensions as its output.

Conservation of Natural Resources↗

Exploring social welfare functions and violation of monotonicity: an example from inequalities in health.

The social welfare function (SWF) has been used within the economics literature, to study trade-offs between equality and efficiency. These SWFs are characterised by properties determined by traditional welfare economics. One of these properties, the monotonicity principle is explored in this paper. In the context of health there may be occasions when the monotonicity principle is violated as there may be circumstances where distributional issues dominate efficiency concerns. When this is the case, conventional SWFs are not flexible enough to represent such social preferences. Therefore, we propose a SWF with an alternative specification, which is general enough to accommodate preferences that are not necessarily monotonic. A survey of the Spanish general public was undertaken to estimate preferences regarding equality in health, relative to efficiency in health. The results (with 973 usable responses) give strong support to the existence of public preferences which violate the monotonicity principle, and thus to the usefulness of the alternative specification proposed here.

Attitude to Health↗

Reproductive outcomes following environmental exposure to DDT.

We used official statistics of births and stillbirths in 1945-1954 to evaluate reproductive outcomes in the general population following use of DDT during a 1946-1950 anti-malarial campaign in the Italian region of Sardinia. Due to the disruption of registration systems in the World War II years, data in the pre-DDT years were available only for 1945-1946. Such a short period of observation, and social conditions in the war and post-war years, do not allow exclusion of adverse effects of DDT on birth rate; however, we did not observe an effect. The stillbirth rate, infant mortality rate, and male/female ratio in newborns were apparently unaffected following widespread but focused use of DDT in Sardinia, Italy.

Birth Rate↗

Governing street-based injecting drug users: a critique of heroin overdose prevention in Australia.

This article provides a critical analysis of existing approaches to the prevention of heroin overdose in Australia. It draws on almost 2 years of ethnographic research with street-based injecting drug users (IDUs), street-based sex workers and service providers in Melbourne, Australia's second largest city, and on recent anthropological and sociological work on governmentality. The substantive sections of the article argue: (1) that heroin overdose prevention in Australia contains implicit or explicit assumptions of rationality and personal autonomy, continues to emphasise individual behaviour change and inscribes a self-disciplined, self-aware, self-regulating subject; and (2) that the social, cultural and economic realities--the 'lived experience'--of street-based IDUs and sex workers may undermine or hinder the successful adoption of overdose prevention strategies. The paper concludes by arguing that the 'chaotic' practices of street-based IDUs and sex workers arise in response to particular 'risk environments', and that individually focused overdose prevention strategies, while an important first step, need to be complemented by measures addressing the macro- and micro-aspects of risk environments.

Adult↗

The European health divide: a matter of financial or social capital?

The 'European east--west health divide' has been documented both for mortality and for self-rated health. The reason for this divide, however, remains to be explained. The aim of this study is, firstly, to investigate whether in 1995-97 differences in self-rated health persisted between countries in central and eastern Europe, the former Soviet Union, and western Europe. A further aim is to try to explain these differences with reference to people's financial status and social capital. This study found substantial differences in self-rated health between countries in western Europe, in central and eastern Europe, and in the former Soviet Union (where self-rated health seems to be poorest in general). There were also substantial differences between areas in terms of economic and social capital, with western Europe doing better in all the analysed circumstances. In economic terms people in the former Soviet Union seemed to be more dissatisfied than those living in central and eastern Europe. When one looks at differences in social capital between the two post-communist areas the picture is more mixed. Economic satisfaction was demonstrated to have a strong and significant effect on people's self-rated health, with a higher satisfaction reducing the odds of 'poor' health. When this factor was controlled for the area, differences in self-rated health were reduced dramatically, for both men and women. Organisational activity (men only), trust in people, and confidence in the legal system also reduced the odds of 'less than good health', but were not as important in explaining the health differences between areas. One can conclude that economic factors as well as some aspects of social capital play a role for area differences in self-rated health. Of these it would appear that economic factors are the more important.

Adult↗

A model of underlying socioeconomic vulnerability in human populations: evidence from variability in population health and implications for public health.

Drawing from insights into the variability of complex biologic systems we propose that the health of human populations reflects the interrelationship between underlying vulnerabilities (determined by population-level social and economic factors; e.g., income distribution) and capacities (determined by population-level salutary resources, e.g., social capital) and how populations, shaped by these vulnerabilities and capacities, respond to intermittent stressors (e.g., economic downturns) and protective events (e.g., introduction of a school). Monitoring this dynamic at the population-level can be accomplished by examining not only rates of illness and mortality, but variability in rates, either between populations or within populations over time. We used mortality data from New York City neighborhoods between 1990 and 2001 to test two related hypotheses consistent with this model of population health: (a) There is greater variability in mortality rates at a point in time between neighborhoods that are characterized by socioeconomic vulnerability; and (b) there is greater variability in mortality rates over time within neighborhoods that are characterized by socioeconomic vulnerability. We found that neighborhoods characterized by social and economic vulnerability displayed substantial variability in particular mortality rates. Mortality rates displaying the greatest variability were from causes that may be sensitive to social conditions (e.g., homicide or HIV/AIDS rates). Variability in population health existed both between neighborhoods with underlying vulnerability at one point in time and within vulnerable neighborhoods over time. The results of this analysis are consistent with a theory of underlying socioeconomic vulnerabilities of human populations and suggest that variability in population health may be an important consideration in population health assessment.

Health Status Indicators↗

The voices of older women in a disadvantaged community: issues of health and social capital.

The voices of older women are rarely heard in debates about the health of disadvantaged groups. Despite growing interest in health in old age, the health experiences of older women as gendered social beings have yet to be fully explored. Their potential to contribute positively to family and community health is seldom acknowledged. The aim of this article is to present findings from a qualitative British Health Development Agency funded project on the relationship between social capital, health and gender, focusing on the health and social networks of older women in a socially disadvantaged community in the north of England. Seventy-seven community members were interviewed, of these 19 were older women aged 55-78 years. Their accounts of ill health in the context of ageing were analysed to explore the intricate ways in which social capital was created, maintained and linked to health. Findings suggest that social constructions of motherhood and caring underpinned responsibility for their own and others' health. Their experiences of dealing with health matters, together with frequent health talk, gave the women confidence as lay health experts, enabling them to contest medical advice. Drawing on personal experiences of trust and reciprocity, they recognised the importance of social networking in alleviating the problems of loneliness and isolation. At stressful times in their lives they were able to draw on existing support networks and, in spite of occasional personal conflicts, some benefited from the empowering and health-enhancing role of formal and informal participation in community life. These findings indicate that older women can operate autonomously in health matters and can substantially influence the development of healthy communities, although this can sometimes be at a personal cost.

Aged↗

Social capital: an individual or collective resource for health?

Although it is now widely acknowledged that the social environment plays an important role in people's health and well-being, there is considerable disagreement about whether social capital is a collective attribute of communities or societies, or whether its beneficial properties are associated with individuals and their social relationships. Using data from the European Social Survey (22 countries, N = 42,358), this study suggests that, rather than having a contextual influence on health, the beneficial properties of social capital can be found at the individual level. Individual levels of social trust and civic participation were strongly associated with self-rated health. At the same time, the aggregate social trust and civic participation variables at the national level were not related to people's subjective health after controlling for compositional differences in socio-demographics. Despite the absence of a main contextual effect, the current study found a more complex cross-level interaction for social capital. Trusting and socially active individuals more often report good or very good health in countries with high levels of social capital than individuals with lower levels of trust and civic participation, but are less likely to do so in countries with low levels of social capital. This suggests that social capital does not uniformly benefit individuals living in the same community or society.

Adult↗