The role of a prospective public health intervention study register in building public health evidence: proposal for content and use

Evidence-informed practice is a key component of public health and the focus of much discussion, of which the nature of evidence and how it is best gathered and appraised has formed a large part. Prospective registration of trials is now a key component of rigour and quality in clinical research and has been supported at an international level through the WHO International Clinical Trials Registry Program. This paper discusses the scope and benefits of trial registration in clinical research, including greater transparency and reduced publication bias. It then considers the potential for a Prospective Public Health Intervention Studies Register specific to the needs of public health and aspects to be included in such a register. It is argued that this initiative has the potential to facilitate increased global cooperation and efficiency in the production of high quality evidence and ultimately in improved health outcomes for populations.

A role for workforce competencies in evidence-based health promotion education

Education programs should be based on research about the knowledge and skills required for practice, rather than on intuition or tradition, but there is limited published curriculum research on health promotion education. This paper describes a case study of how workforce competencies have been used to assist evidence-based health promotion education in the areas of curriculum design, selection of assessment tasks and continuous quality assurance processes in an undergraduate program at an Australian university. A curriculum-competency mapping process successfully identified gaps and areas of overlap in an existing program. Previously published health promotion workforce competencies were effectively used in the process of selecting assessment items, providing clear guidelines for curriculum revision and a useful method to objectively assess competency content in an evidence informed framework. These health promotion workforce competencies constituted an additional tool to assess course quality. We recommend other tertiary institutions consider curriculum-competency mapping and curriculum based assessment selection as quality and evidence based curriculum review strategies.

Mental health promotion and socio-economic disadvantage: lessons from substance abuse, violence and crime prevention and child health

Issue addressed: Mental health promotion aimed at populations with low socio-economic status (SES) may benefit by investigating prevention strategies that effectively address related child and adolescent problems.
Methods: Evidence from a number of literature reviews and program evaluations was synthesised. First, the impact of SES on development from childhood to adulthood is considered in light of research on substance
abuse, violence, crime, and child development problems. Second, evaluations of interventions are reviewed to identify those that have shown outcomes in research studies (efficacy) or in real-world settings (effectiveness) in reducing developmental problems associated with low SES. Low SES is measured in different ways including low levels of education and/or income or definitions that combine several variables into a new indicator of low SES.
Results: Factors associated with low SES are also associated to varying extent with the development of violence and crime, substance abuse and child health problems. Interventions that address underlying determinants of low SES show strong efficacy in decreasing adolescent crime and violence and effectiveness in improving child health outcomes. Although there is limited efficacy evidence that substance abuse prevention can be effectively addressed by targeting low SES, programs designed to improve educational pathways show some efficacy in reducing aspects of adolescent substance use.
Conclusion: Mental health promotion strategies can draw on the approaches outlined here that are associated with the prevention of child and adolescent problems within low SES communities. Alternatively, such interventions could be supported in mental health promotion policy as they may assist in preventing related problems that undermine mental health.

Colorectal cancer screening in Australia: an economic evaluation of a potential biennial screening program using faecal occult blood tests

Objective: To evaluate whether the introduction of a national, co-ordinated screening program using the faecal occult blood test represents 'value-for-money' from the perspective of the Australian Government as third-party funder.  Methods: The annual equivalent costs and consequences of a   biennial screening program in 'steady-state' operation were estimated for the Australian population using 1996 as the reference year. Disability-adjusted life years (DALYs) and the years of life lost (YLLs) averted, and the health service costs were modelled, based on the epidemiology and the costs of colorectal cancer in Australia together with the mortality reduction achieved in randomised controlled trials. Uncertainty in the model was examined using Monte Carlo simulation methods. Results: We estimate a minimum or 'base program' of screening those aged 55 to 69 years could avert 250 deaths per annum (95% uncertainty interval 99–400), at a gross cost of $A55 million (95% UI $A46 million to $A96 million) and a gross incremental cost-effectiveness ratio of $A17,000/DALY (95% UI $A13,000/DALY to $A52,000/DALY). Extending the program to include 70 to 74-year-olds is a more effective option (cheaper and higher health gain) than including the 50 to 54-year-olds. Conclusions: The findings of this study support the case for a national program directed at the 55 to 69-year-old age group with extension to 70 to 74-year-olds if there are sufficient resources. The pilot tests recently announced in Australia provide an important opportunity to consider the age range for screening and the sources of uncertainty, identified in the modelled evaluation, to assist decisions on implementing a full national program.

Improving access to evidence-based acute stroke services: development and evaluation of a health systems model to address equity of access issues

Level 1 evidence for management of patients with stroke in a dedicated Stroke Care Unit (SCU) demonstrates improved outcomes by about 20%. It has been estimated that 21% of Australian hospitals provide an SCU and that these SCUs are mainly located in either metropolitan sites and/or in hospitals with more than 300 beds. To address equity issues related to access to SCUs, the National Stroke Foundation and the Australian Government undertook the National Stroke Units Program. One program outcome was the development of a conceptual model of acute stroke service delivery. The development process and initial evaluation of the model are described. Use of the model to increase capacity within the health care system to treat stroke is discussed.

Healthy parks, healthy people : the health benefits of contact with nature in a park context : a review of current literature

This review identifies significant research that has not previously been compiled. It will provide key information for decision making by park managers, forming the basis of a program of future research to overcome the limited knowledge in this area. It is part of stage two of this project, funded by the International Park Strategic Partners Group. It builds on an earlier review (completed early in 2002 with funding provided by Parks Victoria) by addressing the health and wellbeing benefits of contact with nature in a parks context, at an individual and community level.

Equity-focused health impact assessment framework

Background to the Development of the Equity-Focused HIA Framework
The equity focused health impact assessment (EFHIA) framework arises out of a two year research project funded for the most part by the Australian Government’s Public Health Education Research Program (PHERP) Innovations Grants (Round 2) scheme. This project had as its primary objective the development of a framework for health inequalities impact assessment, subsequently renamed equity focused health impact assessment. A partnership between the University of Newcastle, Deakin University and the University of New South Wales (the Project Management Steering Committee) received the funding and the Australasian Collaboration for Health Equity Impact Assessment (ACHEIA) was formed to undertake appropriate background research and to develop, pilot test, modify and disseminate the framework. The work commenced in September 2002 and concluded in October 2004. Part of the funding included a capacity building workshop in August 2004. ACT Health and the Division of Medicine at the John Hunter Hospital, Newcastle, also provided financial support for the project. The August 2004 Workshop was supported by NSW Health. All participants and organisations involved in the project gave extensive in-kind support.
The aims of the workshop were to bring together an international collaboration of multidisciplinary investigators, public health experts, and key senior health managers working in national, state and local settings, to inform the further development of the framework and to provide training in its application. The initial goals of the project were to work collaboratively to develop a strategic framework to assess the health inequalities of public health-related policies, plans, strategies, decisions, programs and services. The EFHIA framework as presented at the August workshop was developed through:
1. an extensive review of the relevant literature
2. formal and informal consultation with members of ACHEIA (the international
reference group), members of the Project Management Steering Committee and
other relevant experts; and
3. testing of the draft EFHIA framework with the 5 case study partners – who applied the draft framework in a range of health settings (see
Acknowledgements).
The result of this work has been the development of an equity focused health impact assessment framework that can be used to determine the unanticipated and systemic health inequities that may exist within the decision making processes or activities of a range of organisations and sectors. The EFHIA framework provides one approach that can be used to assist decision makers to put equity and health on their agenda in a more obvious and systematic way. The framework represents a ‘moment in time’ rather than a definitive statement or ‘toolkit’ on the best way to proceed. Further practice, refinement and adjustment will be needed over many years to consolidate both HIA and EFHIA. As well as this guide to the framework, additional outputs from the project team include:
- A literature review
- A position paper
- A report on the five case studies
- An evaluation report.
With the consent of the Australian Government, a monograph will be made available to workshop participants at the end of October which contains the framework and the appropriate background papers.

Sustainability and health : supporting global ecological integrity in public health

Radical changes in the biosphere and human interaction with the environment are increasingly impacting on the health of populations across the world. Diseases are crossing the species barrier, and spreading rapidly through globalized transport systems. From new patterns of cancer to the threat of global pandemics, it is imperative that public health practitioners acknowledge the interdependence between the sustainability of the environment and the sustainability of the human species.* Why are issues of global and local sustainability of increasing importance to the public's health?* Why do issues of sustainability require new practices within the professions of public health?* How can future and current public health practitioners develop those new practices?Drawing on scientific evidence of global and local environmental changes, Sustainability and Health offers a thorough background and practical solutions to the overlapping issues in environment and health. It examines potential and existing responses to global and local environment and health issues, involving individuals, community, industry and government. The authors introduce a range of emerging conceptual frameworks and theoretical perspectives, link IT and epidemiology and explain how scoping can link program design, delivery, data collection and evaluation in projects from their very beginning. Public health practitioners need to be able to manage health issues that cut across environmental, economic and social systems and to develop the capacity for leadership in facilitating change. Incorporating learning activities, readings, international case studies and an open learning approach, this is a valuable resource for students of public and environmental health, as well as medical, environmental and health science professionals.

Traffic safety education and health promoting school : a metropolitan and rural pilot study

Traffic Safety Education (TSE) is an important part of a school's program; however, it competes with many other components of schooling such as literacy, numeracy and a number of health areas. Hence TSE provision in Victorian schools has been somewhat fragmented and haphazard in its delivery. This small pilot study involved two metropolitan and two rural schools which attempted to link TSE into mainstream school activities through the new Victorian Essential Learning Standards (VELS) utilising the internationally accepted Health Promoting Schools (HPS) framework.
The findings of the pilot study showed that though schools face many demands, understanding and ownership of TSE is possible when administrative support, professional development and adequate planning time are made available. The report outlines several key recommendations to improve the delivery of Traffic Safety Education in Victorian schools.

Public health

Public health is crucial for the promotion and protection of health. Links between preventive action and improved health status (eg, in the case of smoking-related cancers, the decline in sudden infant death syndrome and rates of cardiovascular disease) present strong arguments for increased investment in public health infrastructure. The Public Health Education and Research Program has ensured a well-trained public health workforce to support national, state and local initiatives.

Quantitative evaluation in health promotion : evaluation with confidence

Over the past 10 years or so, confidence intervals have become increasingly recognised in program evaluation and quantitative health measurement generally as the preferred way of reporting the accuracy of statistical estimates. Statisticians have found that the more traditional ways of reporting results - using P-values and hypothesis tests - are often very difficult to interpret and can be misleading. This is particularly the case when sample sizes are small and results are 'negative' (ie P>0.05); in these cases, a confidence interval can communicate much more information about the sample and, by inference, about the population. Despite this trend among statisticians and health promotion evaluators towards the use of confidence intervals, it is surprisingly difficult to find succinct and reasonably simple methods to actually compute a confidence interval. This is particularly the case for proportions or percentages. Much of the data which are analysed in health promotion are binary or categorical, rather than the quantities and continuous variables often found in laboratories or other branches of science, so there is a need for health promotion evaluators to be able to present confidence intervals for percentages or proportions. However, the most popular statistical analysis computer package among health promotion professionals, SPSS does not have a routine to compute a simple confidence interval for a proportion! To address this shortcoming, I present in this paper some fairly simple strategies for computing confidence intervals for population percentages, both manually and using the right computer software.

An evaluation framework for the qualitative investigation of a physical activity prescription program in rural Victoria

Physical activity (PA) has consistently been shown to improve ones' physical, social and mental health. Hence, the rationale for promoting regular physical activity is relatively straightforward. However, what is less clear from the literature is the mix of strategies, (i.e. 'what is working and why?'), to increase in physical activity levels within a population. Of particular interest to primary care is the concept of Physical Activity Prescription Programs (PAPPs) delivered by general practitioners (GPs).

Several examples of a PAPP exist within England, America, New Zealand and Australia. These all aim to encourage GPs to deliver physical activity advice to their patients effectively and in a timely manner. Notwithstanding, the authors of a recent review of published literature on PAPPs, reveal a deficit of evidence regarding the components for successful PA interventions.

This research through an ethnographic enquiry aims to build on the evidence formulated to date. Through a case study research design, the researcher has developed a methodology to define what is/is not working within this recent trend.

In two rural Divisions of GP, participants have been identified as key stakeholders in the implementation of a PAPPs. They are categorised according to three theoretical paradigms, namely, Policy Makers, Linkers and Adaptors. Following this the three paradigms will be studied on the contextual factors, the characteristics and behaviours of members within all three paradigms. The study has also further defined certain elements for investigation, these include the:
intention of the players
effort undertaken by players, and
effect of parties within.

Primarily qualitative data will be collected; through Desk Analysis (Policies, Strategic and Business plans), Site Visits (Participant Observation) and semi-structured interviews. This presentation defines a qualitative framework and methodology for investigating the outcome of programs that historically has been evaluated using quantitative measures. Hence, the author of this study aims to present a qualitative investigation and subsequent results, defining aspects of a PAPP that allow for successful and sustainable implementation.

Effects of high-intensity progressive resistance training on self-reported health status in older persons with type 2 diabetes

Purpose: To evaluate the influence of high-intensity progressive resistance training (PRT) on self-reported physical and mental health in older persons with type 2 diabetes.

Methods: We performed a 12-month RCT with 36 overweight men and women with type 2 diabetes (aged 60-80 years) who were randomly assigned to a moderate weight-loss diet plus PRT (PRT&WL) or a moderate weight-loss diet plus a control (stretching) program (WL). Gymnasium-based training for 6 months was followed by an additional 6 months of home-based training. The SF-36 (v1) questionnaire was used to obtain physical (PCS) and mental (MCS) health component summary scores at baseline, 6 and 12 months.

Results: Subject retention was 81% and 72% after 6 and 12 months respectively. Exercise adherence during gymnasium- and home-based training was 88% and 73% for the PRT&WL group, and 85% and 78.1% for the WL group respectively. In a regression model adjusted for age and sex, PCS improved in the PRT&WL group compared to the WL group after 6 months of gymnasium-based training (2.3 versus -2.0, p = 0.05), which persisted after 12 months training (0.7 versus -4.1, p = 0.03). There were no between-group differences at 6 or 12 months for the MCS.

Conclusion: High-intensity PRT was effective in improving self-reported physical health, but not mental health. PRT provides an effective exercise alternative in lifestyle management for older adults with type 2 diabetes.

Combating homophobia : preliminary results of a school-based program to reduce discrimination against same-sex attracted youth

Two key determinants of mental health are (a) freedom from discrimination and (b) social connectedness. Same-sex attracted youth who are subjected to violence and discrimination, or who experience homophobia in their everyday lives are at greater risk of mental health problems, including suicidal thoughts and behaviours. As one of the most significant sites of homophobia is the school, a 6-week school-based program designed to help students explore their attitudes to gays and lesbians was developed, called “Pride & Prejudice”. In order to evaluate the usefulness of the program, students’ attitudes were measured before and after their participation. Variables assessed were: beliefs about gender roles, social desirability, attitudes to gay men and lesbians, social connectedness, self-esteem, and attitudes to race. Attitudes towards gay men held by students were significantly more positive after the program, and the level of attendance during the program significantly predicted > this change. A significant positive change also occurred in attitudes towards lesbians. Process evaluation showed that students generally viewed the program positively. From this preliminary data, it can be concluded that school-based programs delivered to individual classes in which students are given the opportunity to explore their attitudes towards lesbians and gay men are likely to lead to a significant reduction in homophobia. Health-promoting schools now have available to them an effective tool for promoting opportunities for students to reflect on their attitudes towards gay men and lesbians, and other aspects of “social diversity”. It is hoped that school-wide implementation of such a program will eventually lead to a reduction in the discrimination same-sex attracted youth often experience (either directly, or indirectly), and improve the social-connectedness of all students.