Participation in health impact assessment: objectives, methods and core values

Health impact assessment (HIA) is a multidisciplinary aid to decision-making that assesses the impact of policy on public health and on health inequalities. Its purpose is to assist decision-makers to maximize health gains and to reduce inequalities. The 1999 Gothenburg Consensus Paper (GCP) provides researchers with a rationale for establishing community participation as a core value of HIA. According to the GCP, participation in HIA empowers people within the decision-making process and redresses the democratic deficit between government and society. Participation in HIA generates a sense that health and decision-making is community-owned, and the personal experiences of citizens become integral to the formulation of policy. However, the participatory and empowering dimensions of HIA may prove difficult to operationalize. In this review of the participation strategies adopted in key applications of HIA in the United Kingdom, we found that HIA's aim of influencing decision-making creates tension between its participatory and knowledge-gathering dimensions. Accordingly, researchers have decreased the participatory dimension of HIA by reducing the importance attached to the community's experience of empowerment, ownership and democracy, while enlarging its knowledge-gathering dimension by giving pre-eminence to "expert" and "research-generated" evidence. Recent applications of HIA offer a serviceable rationale for participation as a means of information gathering and it is no longer tenable to uphold HIA as a means of empowering communities and advancing the aims of participatory democracy.     

Visually evoked eye movements: Effects of labyrinthectomy

Nystagmus responses of cats to both optokinetic and flicker stimuli were studied before and after unilateral and bilateral labyrinthectomy. Destruction of the labyrinths served to reduce significantly the number of eye movements to each type of the visual stimuli. The opposite-direction after-nystagmus elicited by the optokinetic stimulus were abolished by bilateral labyrinthectomy. No changes occurred in the frequency of the flash nystagmus response that could be ascribed to body position. Thus, the data confirm previous work by others, but suggest species differences with regard to several properties of visually evoked nystagmus.     

Fibrin glue for fistula–in–ano: the evidence reviewed

Fibrin glue is increasingly used in the treatment of anal fistulae. This review aims to establish its longterm efficacy and clarify its role in this setting. A search of Medline and Pubmed databases was performed from 1966 to 2004. Data were collated regarding the type of study, fistula aetiology and complexity, technical aspects of glue application, and short– and long–term healing rates. The majority of studies comprised prospective series with fistulae of mixed aetiology. The overall healing rate was 53% with a wide variation between studies (10%–78%). The only factor that could account for this diversity was fistula complexity, with series including a high proportion of complex fistulae reporting worse outcomes. The quality of data to assess the efficacy of fibrin glue in the treatment of anal fistulae is poor and further clinical trials are needed. Fistula complexity is the main factor that adversely influences long–term healing rates.     

Suicide after deliberate self-harm: a 4-year cohort study

OBJECTIVE: The purposes of this study were to estimate suicide rates up to 4 years after a deliberate self-harm episode, to investigate time-period effects on the suicide rate over the follow-up period, and to examine potential sociodemographic and clinical predictors of suicide within this cohort. METHOD: This prospective cohort study included 7,968 deliberate self-harm attendees at the emergency departments of four hospital trusts in the neighboring cities of Manchester and Salford, in northwest England, between September 1, 1997, and August 31, 2001. Suicide rates and standardized mortality ratios (SMRs) for the cohort were calculated. Potential risk factors were investigated by using Cox's proportional hazards models. RESULTS: Sixty suicides occurred in the cohort during the follow-up period. An approximately 30-fold increase in risk of suicide, compared with the general population, was observed for the whole cohort. The SMR was substantially higher for female patients than for male patients. Suicide rates were highest within the first 6 months after the index self-harm episode. The independent predictors of subsequent suicide were avoiding discovery at the time of self-harm, not living with a close relative, previous psychiatric treatment, self-mutilation, alcohol misuse, and physical health problems. CONCLUSIONS: The results highlight the importance in a suicide prevention strategy of early intervention after an episode of self-harm. Treatment should include attention to physical illness, alcohol problems, and living circumstances. Self-harm appears to confer a particularly high risk of suicide in female patients.     

Reduction in heart failure hospitalization rate during the first year of follow-up at a multidisciplinary unit

INTRODUCTION AND OBJECTIVES: Heart failure leads to frequent hospital readmissions. The aim of this study was to assess how receiving attention at our multidisciplinary unit influenced hospitalization for heart failure. We compared the number of admissions in the year preceding attendance with that in the first year of follow-up. PATIENTS AND METHOD: In total, 366 patients were admitted between August 2001 and June 2003. Of these, 332 were still alive and could be assessed clinically 1 year later. The most common etiologies were ischemic heart disease in 60%, and dilated cardiomyopathy in 10%. RESULTS: The number of admissions in the year preceding attendance was 246, while that during the first year of follow-up was 125, which corresponds to a statistically significant reduction of 49% (P<.001). The reduction was even greater (54%, P<.001), when only patients who were hospitalized more than once in the preceding year were analyzed. Moreover, in addition to the improvements noted during follow-up in patients' understanding of the disease and in several aspects of self-care, the increase in treatment use was also remarkable: beta-blocker use increased from 53% to 70%, spironolactone use from 20% to 30%, and statin use from 36% to 58%. CONCLUSIONS: The number of hospital admissions for heart failure among patients who received attention at our multidisciplinary unit was significantly less in the first year of follow-up than in the year preceding attendance. This reduction was probably due to educational and pharmacologic interventions and to closer follow-up.     

Diabetes mellitus and pancreatic tumor

A 68 year old Ecuadorian man was investigated for polyuria, polydipsia and weight loss of 3 kg during the previous two months. Insulin dependent diabetes mellitus was diagnosed 10 year before admission and treated with appropriate diet and insulin (35 U/d). 18 months before was diagnosed in El Ecuador of "multiple liver nodes non-suggestive of malignancy". Physical examination showed a large multinodular petrous hepatomegaly. There was no evidence of skin lesions. Results of laboratory studies included a basal plasma glucose level that ranged between 275-367 mg/dl (N=60-100), glycosylated haemoglobin of 8.9% (N<5) and a serum albumin of 2.8 gr./dl (N=3.4-4.8). At admission non-other laboratory alterations were detected. Computed tomography showed a mass on the head of the pancreas with loco-regional lymph nodes and liver metastases. Tumor markers were normal. Fine-needle aspiration cytology of the liver masses revealed the presence of liver metastases of a non-differentiated malignant tumor. A 111In-DTPAOC scintigraphy revealed the presence of somatostatin receptors in the liver metastases, also detecting the presence of multiple bone metastases in the axial and appendicular skeleton. Plasma glucagon level was 678 pg/ml (N<250). A diagnosis of metastatic glucagonoma was established and therapy with streptozocin, 5-FU, insulin and synthetic somatostatin analogs was initiated. Three months after the therapy initiation the patient was symptom free. Some weeks after the patient suffered from left hip pain, and a control 111In-DTPA scintigraphy showed progression of his bone metastases. In conclusion, glucagonoma must be suspected in all diabetic patients with metastatic liver, even in absence of necrotic migratory erythema. In these circumstances, plasmatic glucagon level and somatostatin receptors scintigraphy will be a useful tool for establishing the final diagnosis.