Impact of the environment on the health: From theory to practice.

The Erice 56 Charter titled "Impact of the environment on the health: from theory to practice" was unanimously approved at the end of the 56th course of the "International School of Epidemiology and Preventive Medicine G. D'Alessandro" held from 3rd to November 7, 2019 in Erice - Sicily (Italy) and promoted by the Study Group of "Environment and Health" of the Italian Society of Hygiene, Preventive Medicine and Public Health. The course, that included lectures, open discussions and guided working groups, was aimed to provide a general training on epidemiological and toxicological aspects of the environmental health impact, to be used by public health professionals for risk assessment, without forgetting the risk communications. At the end of the course 12 key points were agreed among teachers and students: they underlined the need of specific training and research, in the perspective of "One Health" and "Global Health", also facing emerging scientific and methodological issues and focusing on communication towards stakeholders. This Discussion highlight the need to improve knowledge of Health and Environment topic in all sectors of health and environmental prevention and management.

The effect of pelvic floor muscle training alone or in combination with electrostimulation in the treatment of sexual dysfunction in women with multiple sclerosis.

BACKGROUND: Sexual dysfunction (SD) affects up to 80% of multiple sclerosis (MS) patients and pelvic floor muscles (PFMs) play an important role in the sexual function of these patients. OBJECTIVES: The objective of this paper is to evaluate the impact of a rehabilitation program to treat lower urinary tract symptoms on SD of women with MS. METHODS: Thirty MS women were randomly allocated to one of three groups: pelvic floor muscle training (PFMT) with electromyographic (EMG) biofeedback and sham neuromuscular electrostimulation (NMES) (Group I), PFMT with EMG biofeedback and intravaginal NMES (Group II), and PFMT with EMG biofeedback and transcutaneous tibial nerve stimulation (TTNS) (Group III). Assessments, before and after the treatment, included: PFM function, PFM tone, flexibility of the vaginal opening and ability to relax the PFMs, and the Female Sexual Function Index (FSFI) questionnaire. RESULTS: After treatment, all groups showed improvements in all domains of the PERFECT scheme. PFM tone and flexibility of the vaginal opening was lower after the intervention only for Group II. All groups improved in arousal, lubrication, satisfaction and total score domains of the FSFI questionnaire. CONCLUSION: This study indicates that PFMT alone or in combination with intravaginal NMES or TTNS contributes to the improvement of SD.

[Mortality results in SENTIERI Project]. / Risultati dell'analisi della mortalità nel Progetto SENTIERI.

SENTIERI Project (Mortality study of residents in Italian polluted sites) studies mortality of residents in 44 sites of national interest for environmental remediation (Italian polluted sites, IPS). The epidemiological evidence of the causal association between causes of death and exposures was a priori classified into one of these three categories: Sufficient (S), Limited (L) and Inadequate (I). In these sites various environmental exposures are present. Asbestos (or asbestiform fibres as in Biancavilla) has been the motivation for defining six sites as IPSs (Balangero, Emarese, Casale Monferrato, Broni, Bari-Fibronit, Biancavilla). In five of these, increases in malignant neoplasm or pleura mortality are detected; in four of them, results are consistent in both genders. In six other sites (Pitelli, Massa Carrara, Aree del Litorale Vesuviano, Tito, "Aree industriali della Val Basento", Priolo), where other sources of environmental pollution in addition to asbestos are reported, mortality from malignant neoplasm of pleura is increased in both genders in Pitelli, Massa Carrara, Priolo, "Litorale vesuviano". In the time span 1995-2002, a total of 416 extra cases of malignant neoplasm of pleura are detected in the twelve asbestos-polluted sites. Asbestos and pleural neoplasm represent an unique case. Unlike mesothelioma, most causes of death analyzed in SENTIERI have multifactorial etiology; furthermore, in most IPSs multiple sources of different pollutants are present, sometimes concurrently with air pollution from urban areas: in these cases, drawing conclusions on the association between environmental exposures and specific health outcomes might be complicated. Notwithstanding these difficulties, in a number of cases an etiological role could be attributed to some environmental exposures. The attribution could be possible on the basis of increases observed in both genders and in different age classes, and the exclusion of a major role of occupational exposures was thus allowed. For example, a role of emissions from refineries and petrochemical plants was hypothesized for the observed increases in mortality from lung cancer and respiratory diseases in Gela and Porto Torres; a role of emissions from metal industries was suggested to explain increased mortality from respiratory diseases in Taranto and in Sulcis-Iglesiente-Guspinese. An etiological role of air pollution in the raise in congenital anomalies and perinatal disorders was suggested in Falconara Marittima, Massa-Carrara, Milazzo and Porto Torres. A causal role of heavy metals, PAH's and halogenated compounds was suspected for mortality from renal failure in Massa Carrara, Piombino, Orbetello, "Basso bacino del fiume Chienti" and Sulcis-Iglesiente-Guspinese. In Trento-Nord, Grado and Marano, and "Basso bacino del fiume Chienti" increases in neurological diseases, for which an etiological role of lead, mercury and organohalogenated solvents is possible, were reported. The increase for non-Hodgkin lymphomas in Brescia was associated with the widespread PCB pollution. Mortality for causes of death with a priori Sufficient or Limited evidence of association with the environmental exposure exceeds the expected figures, with a SMR of 115.8% for men (90% IC 114.4-117.2; 2 439 extra deaths) and 114.4% for women (90% CI 112.4-116.5; 1 069 extra deaths). These excesses are also observed when analysis is extended to all the causes of death (i.e. with no restriction to the ones with a priori Sufficient or Limited evidence): for a total of 403 692 deaths (both men and women), an excess of 9 969 deaths is observed, with an average of about 1 200 extra deaths per year. Most of these excesses are observed in IPSs located in Southern and Central Italy. The procedures and results of the evidence evaluation are presented in a 2010 Supplement of Epidemiology & Prevention devoted to SENTIERI.

Myocardial bridging: cases reports.

We report 2 cases of Myocardial Bridge (MB). MB, even though a very frequent anomaly (found out in 85% of autopsies), often is asymptomatic. It is hard to diagnose in patients affected by coronary artery disease, seldomly found out on selective coronary angiograms (in 16-20% of chest pain cases). MB can be considered as one of the causes of coronary artery disease.

Use of amiodarone in emergency.

Amiodarone is one of the most common anti-arrhythmic drugs used in the Emergency Department. Recent guidelines on cardiac arrest with shockable rhythm [refractory ventricular fibrillation (VF)/pulseless ventricular tachycardia (VT)] recommend amiodarone as anti-arrhythmic of first choice. Amiodarone is also first choice drug in the treatment of various ventricular and supra-ventricular tachyarrhythmias. This paper deals with the main therapeutical indications of amiodarone in emergency medicine: dosage, side effects, contraindications and pharmacological interactions are reviewed. Amiodarone is effective for control of hemodynamically stable VT, polymorphic VT and wide-complex tachycardia of uncertain origin. It is also helpful for ventricular rate control of rapid atrial arrhythmias in patients with severely impaired left ventricular (LV) function, when digitalis has been ineffective, and is an adjunct to electrical cardioversion. The major side effects of amiodarone are hypotension, bradycardia and peripheral phlebitis. Major contraindications to the intravenous (i.v.) injection of amiodarone are bradycardia, senoatrial block, severe disturbs of conduction, second or third degree atrio-ventricular blocks. Other contraindications are hypotension, severe respiratory failure, hepatocellular failure and hyperthyroidism. Pharmacological interactions are reported with HMG-CoA reductase inhibitors, class I antiarrhythmic agents and other drugs which contribute to prolong QT interval, digoxin, oral anticoagulants and general anaesthesia.

Evaluation of patients with bladder outlet obstruction and mild international prostate symptom score followed up by watchful waiting.

OBJECTIVES: To examine the variability of bladder outlet obstruction and mild lower urinary tract symptoms in patients with benign prostatic hyperplasia (BPH) followed up by watchful waiting. METHODS: The International Prostate Symptom Score (IPSS) has four questions related to voiding symptoms and three related to filling symptoms. Scores of 0 to 7, 8 to 19, and 20 to 35 represent mild, moderate, and severe symptoms, respectively. Over a period of 36 months the IPSS questionnaire was administered to 479 patients 50 to 81 years old (mean age 63) with BPH. A pressure-flow study was used to determine the presence of bladder outlet obstruction. On the basis of their scores, the patients were classified into 50 with mild, 227 with moderate, and 202 with severe symptoms. In the present study only patients with a mild score were analyzed. RESULTS: Of 50 patients with mild symptoms, 16 (32%) had bladder outlet obstruction. After a period of 9 to 22 months (mean 17) of watchful waiting, these 16 patients were reviewed. Twelve (75%) of the 16 had bladder outlet obstruction reconfirmed by pressure-flow studies, and 3 (18.8%) of 16 had increased symptoms (moderate symptomatic) and underwent treatment (1 began pharmacologic treatment, and 2 chose transurethral resection). A total of 4 (25%) of 16 patients still had mild voiding disturbances and refused the second urodynamic evaluation. The remaining 34 patients with no obstruction had annual routine follow-up and had persistent mild symptom scores and normal uroflowmetric results. These patients did not undergo another pressure-flow evaluation. CONCLUSIONS: A pressure-flow study is routinely avoided in patients with a mild IPSS. From symptoms alone it was not possible to diagnose bladder outlet obstruction in these patients. Pressure-flow studies and symptom profiles measure different aspects of the clinical condition. After a mean follow-up of 17 months of watchful waiting, 13 (81.2%) of 1 6 patients were clinically stable. Because the need for therapy is dictated by quality of life, it is difficult to propose treatment for patients with minimal symptoms, even in the presence of bladder outlet obstruction.

Quality of life after partial penectomy for penile carcinoma.

OBJECTIVES: To investigate the impact of partial penectomy on the quality of life of patients with carcinoma of the penis. METHODS: Fourteen patients who had undergone partial penectomy for penile cancer were studied. Their median age was 50.5 years and the median time of follow-up was 11.5 months. The quality of life was evaluated in three dimensions: social adjustment, sexuality, and emotional state. The patients underwent a semistructured interview and were asked to complete the Overall Sexual Functioning Questionnaire, the Social Problem Questionnaire, the General Health Questionnaire, and the Hospital Anxiety and Depression Scale. RESULTS: In 9 (64%) patients, the overall sexual function was normal or slightly decreased. Only 2 (14%) men had precarious or absent sexual function. The masculine self-image and the relationship with their partners remained practically unchanged in all the patients. Sexual interest and satisfaction remained normal or slightly reduced in 9 and 12 patients, respectively. The frequency of sexual intercourse was unchanged or slightly decreased in 9 patients. Three patients had no sexual intercourse after surgery. No significant levels of anxiety and depression were found. Within the areas of living conditions, family life, and interactions with other people, all the patients remained as they were before the surgery. CONCLUSIONS: Patients who undergo partial penectomy for penile cancer can maintain the quality of life (in social, psychological, and sexual terms) at levels similar to those that existed in the period before surgery.

The burden of hospitalised pneumonia in Lazio, Italy, 1997-1999.

OBJECTIVE: To evaluate the burden of hospitalised pneumonia in adults in the Lazio region (1997-1999); to describe community-acquired pneumonia (CAP), suspected nosocomial infection (NI) and AIDS-related pneumonia. METHODS: Using data from the Hospital Information System, we traced the hospitalisation history of patients and classified CAP, NI and AIDS-related pneumonia. RESULTS: During the study period, 30517 incident events of pneumonia occurred: 20497 CAP, 9760 NI, and 964 AIDS-related pneumonia; 704 of these were also NI (annual incidence rate 158, 75 and 7.4 per 100 000 population, respectively). The mean ages were 65, 69 and 38 years for CAP, NI, and AIDS-related pneumonia, respectively. Higher hospitalisation rates were observed in Rome than in the rest of the region for NI and AIDS-related cases, but not for CAP. Lower socioeconomic groups showed a higher incidence of CAP and AIDS-related pneumonia. Peaks of incidence were observed in winter for CAP and NI. Only 20% of pneumonias have an aetiological diagnosis. In-hospital fatality rates were 9.4%, 29.3% and 11.2% for CAP, NI and AIDS-related pneumonia, respectively. CONCLUSION: The high incidence and fatality of CAP and NI, especially among the elderly, makes these diseases a problem that is re-emerging in industrialised countries with an ageing population.

Coronary artery bypass graft surgery: socioeconomic inequalities in access and in 30 day mortality. A population-based study in Rome, Italy.

OBJECTIVES: To evaluate whether coronary artery bypass graft (CABG) surgery is equally provided among different socioeconomic status (SES) groups in accordance with need. To estimate the association between SES and mortality occurring 30 days after CABG surgery. DESIGN: Individual socioeconomic index assigned with respect to the characteristics of the census tract of residence (level I = highest SES; level IV = lowest SES). Comparison of age adjusted hospital admission rates of ischaemic heart disease (IHD) and CABG surgery among four SES groups. Retrospective cohort study of all patients who underwent CABG surgery during 1996-97. SETTING: Rome (2 685 890 inhabitants) and the seven cardiac surgery units in the city. PARTICIPANTS: All residents in Rome aged 35 years or more. A cohort of 1875 CABG patients aged 35 years or more. MAIN OUTCOME MEASURES: Age adjusted hospitalisation rates for CABG and IHD and rate of CABG per 100 IHD hospitalisations by SES group, taking level I as the reference group. Odds ratios of 30 day mortality after CABG surgery, adjusted for age, gender, illness severity at admission, and type of hospital where CABG was performed. RESULTS: People in the lowest SES level experienced an excess in the age adjusted IHD hospitalisation rates compared with the highest SES level (an excess of 57% among men, and of 94% among women), but the rate of CABG per 100 IHD hospitalisations was lower, among men, in the most socially disadvantaged level (8.9 CABG procedures per 100 IHD hospital admissions in level IV versus 14.1 in level I rate ratio= 0.63; 95% CI 0.44, 0.89). The most socially disadvantaged SES group experienced a higher risk of 30 day mortality after CABG surgery (8. 1%) than those in the highest SES group (4.8%); this excess in mortality was confirmed even when initial illness severity was taken into account (odds ratio= 2.89; 95% CI 1.44, 5.80). CONCLUSIONS: The universal coverage of the National Health Service in Italy does not guarantee equitable access to CABG surgery for IHD patients. Factors related to SES are likely to influence poor prognosis after CABG surgery.

Inequality in health: socioeconomic differentials in mortality in Rome, 1990-95.

STUDY OBJECTIVE: Population groups with a lower socioeconomic status (SES) have a greater risk of disease and mortality. The aim of this study was to investigate the relation between SES and mortality in the metropolitan area of Rome during the six year period 1990-1995, and to examine variations in mortality differentials between 1990-92 and 1993-95. DESIGN: Rome has a population of approximately 2,800,000, with 6100 census tracts (CTs). During the study period, 149,002 deaths occurred among residents. The cause-specific mortality rates were compared among four socioeconomic categories defined by a socioeconomic index, derived from characteristics of the CT of residence. MAIN RESULTS: Among men, total mortality and mortality for the major causes of death showed an inverse association with SES. Among 15-44 year old men, the strong positive association between total mortality and low SES was attributable to AIDS and overdose mortality. Among women, a positive association with lower SES was observed for stomach cancer, uterus cancer and cardiovascular disease, whereas mortality for lung and breast cancers was higher in the groups with higher SES. Comparing the periods 1990-92 and 1993-95, differences in total mortality between socioeconomic groups widened in both sexes. Increasing differences were observed for tuberculosis and lung cancer among men, and for uterus cancer, traffic accidents, and overdose mortality among women. CONCLUSIONS: The use of an area-based indicator of SES limits the interpretations of the findings. However, despite the possible limitations, these results suggest that social class differences in mortality in Rome are increasing. Time changes in lifestyle and in the prevalence of risk behaviours may produce differences in disease incidence. Moreover, inequalities in the access to medical care and in the quality of care may contribute to an increasing differentials in mortality.

Metadoxine in the treatment of acute and chronic alcoholism: a review.

Alcohol abuse and alcoholism are responsible for a wide variety of medical problems. The pharmaco-therapeutic aspect of alcoholism includes the use of drugs, with different actions and objectives. Among them, metadoxine seems to be of interest. Metadoxine is able to accelerate the elimination of alcohol from the blood and tissues, to help restore the functional structure of the liver and to relieve neuro-psychological disorders associated with alcohol intoxication. Metadoxine also seems to be safe; in more than 15 years of post-marketing surveillance only minor aspecific and reversible events were monitored in patients exposed to the treatment. In this review the preclinical and clinical results obtained using metadoxine in acute and chronic alcohol intoxication are reported.

State and trait anxiety in women affected by allergic and vasomotor rhinitis.

It is still debatable whether anxiety and depression in patients affected by rhinitis could play a role in the genesis of the disease, whether they are a consequence of the symptoms. The aim of this study was to evaluate anxiety levels in both state and trait forms, and depression, in patients affected by allergic (AR) and vasomotor rhinitis (VMR). A total of 45 women, 24 AR and 21 VMR were compared with 64 healthy nonallergic women matched for age and sociodemographic characteristics. All subjects were administered the State and Trait Anxiety Inventory (STAI) and the Zung self-rating depression scale. The percentage of subjects with high levels of state anxiety was significantly higher in AR (p<0.005) and VMR (p<0.01) with respect to controls. The percentage of subjects with high levels of trait anxiety was significantly higher in AR (p<0.001) and VMR (p<0.05) than controls. There was no significant difference in depression between AR and VMR and controls. No significant difference was found in state anxiety, trait anxiety, or depression between AR and VMR. In conclusion, anxiety in patients with rhinitis is present both as a state and as a trait, at least when measured with the STAI.

Occupational and environmental exposures and lung cancer in an industrialised area in Italy.

AIMS: To investigate the effects of occupational exposures and residence near to industrial sites on lung cancer mortality in an area in Italy. METHODS: 234 cases of lung cancer and 729 controls matched by sex, age, and date of death were enrolled. Environmental exposure was evaluated using historical residence data. A geographical information system was used to compute distances from residence to pollution source (cement factory, power plants, harbour) and an average distance was computed for each subject. Odds ratios (OR) and 95% confidence intervals (CI) in a logistic regression model were used to estimate the relative risk of lung cancer associated with the risk factors (smoking habits and occupational exposure) collected by questionnaire; ORs for distances from pollution sources and from city centre were computed, adjusting for smoking habits, education, and occupation. RESULTS: Smoking habits (< or =10 cigarettes/day, OR = 2.28; 11-20, OR = 4.64; >20, OR = 6.61) and occupational exposure to asbestos (OR = 3.50) were significantly associated with lung cancer risk. Reported traffic level of area of residence and residence near the four sources were not associated with increased risk of lung cancer. There was a significantly increased risk for those residing outside the city centre, in the southern outskirts (OR = 1.51). CONCLUSIONS: The increased lung cancer risk observed in the area can partly be explained by occupational exposures. The increased risk in the outskirts of the city is consistent with the results of dispersion models that indicate high levels of pollutant deposition in the same area.

Pharmacological approaches to the management of alcohol addiction.

Alcohol abuse and alcoholism represent a world-wide problem, both from a medical and a social point of view. In the past the therapy for patients affected by alcoholism was based mainly on the psychological approach. In recent years the use of pharmacotherapy together with psychosocial interventions have enhanced the percentage of success in maintaining alcoholic patients in remission. The present review discusses the main drugs experimented both in preclinical and clinical studies. Pharmacotherapy of alcohol dependence seems to be effective in both alcohol-related emergencies and prevention relapse. However, pharmacotherapy should not be considered as the only form of treatment but as an integrated part of a multimodal approach including psychological and social support.

Vasography: experimental study.

Vasography may cause stricture of the vas deferens. The probable causes of this obstruction are traumatic lesion at the puncture site and the radiological contrast material used. Because of this problem we performed an experimental study using Wistar rats, which were divided into four groups: Group A - Control, Group B - injection of a saline solution, Group C - hypaque injection, Group D - hypaque plus saline solution. According to the results obtained it was concluded that the needle puncture is not responsible for stricture of the vas deferens. Hypaque is responsible for 5% of strictures and the use of a saline solution to wash the vas did not show any benefit.

Cyclic fluctuations in hospital bed occupancy in Roma (Italy): supply or demand driven?

The objective of this study was to assess hospital bed occupancy both by planned and unplanned cases, and to assess how supply and demand affect bed occupancy. Data was obtained from the Lazio Hospital Information System (HIS) dataset on all hospital discharges from July 1998 to June 2001. Using Diagnosis Related Groups (DRG) as the reason for hospital stay, admissions were classified into four categories: 'planned stay', 'presumed planned stay', 'presumed unplanned stay', and 'unplanned stay'. Time series analysis of daily bed occupancy by category of stay was performed. Generalized Additive Models (GAMs) were used to asses the effect of weekdays and holidays on bed occupancy. Fluctuations in daily occupancy were observed in all categories of stay-in general, bed occupancy decreased over weekends, on national holidays, and during the major holiday season of August. In comparison with unplanned stays, the largest fluctuations were observed for planned stays while presumed planned and unplanned stays showed lesser fluctuations. It is possible to distinguish planned and unplanned hospital stays by using DRG grouping. Cyclic rigidities in the supply of services rather than the availability of beds or demand for beds seem to dictate hospital use in Roma so that restrictions in services hamper any reallocation of beds for 'planned stay' when demand for 'unplanned stay' beds declines.

[Socioeconomic differences in mortality in Rome, 1990-1995]. / Differenze sociali nella mortalità a Roma negli anni 1990-1995.

Population groups with a lower socioeconomic status (SES) have a greater risk of disease and mortality. The aim of this study was to investigate the relationship between SES and mortality in the metropolitan area of Rome during the six-year period 1990-1995, and to examine variations in mortality differentials between 1990-92 and 1993-95. Rome has a population of approximately 2,800,000, with 6,100 census tracts (CTs). During the study period, 149,002 deaths occurred among residents. We compared cause-specific mortality rates among four socioeconomic categories (SES) defined by a socioeconomic index, derived from characteristics of the CT of residence. Among men, total mortality and mortality for the major causes of death showed an inverse association with SES. Among 15-44 year old men, the strong positive association between total mortality and low SES was due to AIDS and overdose mortality. Among women, a positive association with lower SES was observed for stomach cancer, uterus cancer and cardiovascular disease, whereas mortality for breast cancer was higher in the groups with higher SES. Comparing the periods 1990-92 and 1993-95, differences in total mortality between socioeconomic groups widened in both sexes. Increasing differences were observed for tuberculosis and lung cancer among men, and for uterus cancer, traffic accidents, and overdose mortality among women. The use of an area-based indicator of SES limits the interpretations of the findings. However, despite the possible limitations, these results suggest that social class differences in mortality in Rome are increasing. Time changes in life style and in the prevalence of risk behaviors may produce differences in disease incidence. Moreover inequalities in the access to medical care and in the quality of care may contribute to an increasing differentials in mortality.

[Differences in in-hospital mortality in patients treated with aortocoronary bypass for cardiopathic ischemia, Rome 1996]. / Differenze di mortalità intraospedaliera in pazienti sottoposti a bypass aortocoronarico per cardiopatia ischemica, Roma 1996.

Data from Health Information Systems (HIS) have been used in recent years to evaluate effectiveness and quality of care. We analyzed in-hospital mortality occurring within 30 days following operation among 1984 patients (age > or = 35 yrs, males 84%) who underwent Coronary Artery Bypass Graft (CABG) surgery in seven hospitals in Rome in 1996. Data were extracted from the Lazio HIS run by the Regional Health Authority. The HIS database includes up to four diagnoses and surgical procedures (ICD-9); the following variables were considered a priori risk factors: type of ischemic disease, comorbidities, and others surgical interventions during the same admission. Logistic regression was performed in order to evaluate the association between hospital and risk of mortality after adjusting for potential confounders (ORs and 95% CI). The overall in-hospital mortality was 4.7% (ranged from 0.0 to 14.7%). Predictors of outcome included: older age, acute myocardial infarction, chronic myocardial ischemia, other heart diseases, chronic renal diseases, peripheral vascular diseases, other heart and vascular interventions. Statistically significant variability in mortality was observed across hospitals; taking hospital A as reference, hospitals D and E showed the highest risks (OR = 6.36 and OR = 3.12, respectively). We conclude that the observed differences in mortality rates among hospitals cannot be explained by differences in case mix, nor by varying coding styles. They are likely to reflect differences in currently unknown aspects of patient care.

[Socioeconomic inequalities in health care efficacy. Three examples in Lazio region]. / Diseguaglianze socioeconomiche nell'efficacia dei trattamenti sanitari. Tre esempi nel Lazio.

There has been a limited number of studies in Italy investigating the relationship between socioeconomic inequalities and efficacy of treatments. This paper reviews three case studies on the association between socioeconomic status and disease outcome in the Lazio Region, Italy. The studies investigated: a) the probability of renal transplantation among patients with endstage renal disease; b) the survival of AIDS patients before and after the introduction of the new antiretroviral therapies; c) the 30-day mortality of patients who underwent coronary artery bypass graft surgery. The three studies demonstrate the complex relationship between socioeconomic status and both access to, and efficacy of, important health interventions.

[Leukemia mortality and incidence of infantile leukemia near the Vatican Radio Station of Rome]. / Mortalità per leucemia e incidenza di leucemia infantile in prossimità della stazione di Radio Vaticana di Roma.

Some recent epidemiological studies suggest an association between lymphatic and haematopoietic cancers and residential exposure to high frequency electromagnetic fields (100 kHz-300 GHz) generated by radio and television transmitters. Vatican Radio, a very powerful radio station transmitting all over the world (up to 600 kW) is located in Santa Maria di Galeria, in the northern suburbs of the city of Rome. Electric field measurements in the proximity of the radio station ranged between 1.5 and 25 V/m. In the 10 km area around the station, with 60.182 residents (1999), leukaemia mortality among adults (> 14 years, 40 cases) in the period 1987-98 and childhood leukaemia incidence in the period 1987-99 (8 cases) were evaluated. The analysis (Stone's conditional test) was performed computing observed and expected cases (reference: population of Rome) in 5 bands of increasing radius (2 km width). The risk of childhood leukaemia was higher than expected within 6 km from the station (Standardized Incidence Ratio = 217; 95% Confidence Interval 99-405). Stone's test showed a significant decrease in risk with increasing distance both for male adult mortality (p-value = 0.03) and for childhood incidence (p-value = 0.04). A Score test, showed a significant decrease in risk of childhood incidence as function of the distance. The main limitations of this study are the small number of observed cases and the use of distance as a proxy for RF exposure. Further research will require a systematic campaign of electromagnetic field measurements to allow better assessment of the population exposure.