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L Simonato

Publications and source records attributed to L Simonato.

At least 73 records · Page 4Linked to original sources
PubMed1986

Estimates of the proportion of bladder cancers attributable to occupation.

In order to estimate the proportion of bladder cancers attributable to occupation in different countries, three criteria were defined, each with a different degree of strictness, for the inclusion of job titles or industrial activities in the estimates. Such criteria were applied to the available case-referent studies, the range for the less severe criterion estimates being 0-19% and that of the strictest being 1-19%. The variability was greater among the studies than among the criteria of inclusion of occupations; therefore the study design and time- and place-specificity of exposures play an important role in the magnitude of such estimates.

Carcinogens↗
PubMed1986

The man-made mineral fiber European historical cohort study. Extension of the follow-up.

The study concentrated on 21,967 workers producing rock wool/slag wool, glass wool or continuous filament in 13 European factories. The expected deaths and incident cancer cases were derived from multiplying the accumulated person-years by national reference rates across sex, age, and calendar-year strata, correction factors for regional lung cancer mortality also being used. Exposure assessment was based on the results of a historical environmental investigation reported elsewhere. There were 189 deaths (151.2 expected), and for rock-wool/slag-wool and glass-wool workers the standardized mortality ratios for lung cancer showed a pattern of increasing mortality with time since first exposure but not duration of employment. There was an excess of lung cancer among rock-wool/slag-wool workers employed during an early technological phase before the introduction of dust-suppressing agents, and fiber exposure, either alone on in combination with other exposures, may have contributed to the elevated risk. No excess of the same magnitude was evident for glass-wool production, and the follow-up of the continuous filament cohort was too short to allow for an evaluation of possible long-term effects. There was no evidence of an increased risk for pleural tumors or nonmalignant respiratory diseases.

Calcium Compounds↗
PubMed1984

Mortality and incidence of cancer of workers in the man made vitreous fibres producing industry: an international investigation at 13 European plants.

A total of 25 146 workers at 13 plants producing man made mineral fibres (MMMF) in seven European countries (Denmark, Finland, Federal Republic of Germany, Italy, Norway, Sweden, and United Kingdom) were studied in a historical cohort investigation. At 12 of the 13 plants an environmental survey was carried out to determine present day concentrations of airborne man made mineral fibres that showed levels of respirable fibres usually below 1 f/ml and most commonly in the range 0.01 to 0.1 f/ml. Workers were entered into the cohort at the moment of their first employment at one of the 13 factories (which started to operate between 1900 and 1955), and were followed up to at least 31 December 1977. Three per cent of the workers were lost to follow up. National death rates and national cancer incidence rates, where applicable, were used for each of the seven countries for comparison with the workers' cohort. A single death from mesothelioma was reported out of a total of 309 353 person-years of observation. No consistent differences (within and between plants) were noted between observed and expected numbers concerning individual causes of death or individual cancer sites, apart from lung cancer. For this cause a tendency was observed for the standardised mortality ratio (SMR) to increase with time from first employment. When the data from all the plants were pooled a statistically significant raised SMR of 192 (17 observed, 8.9 expected; 95% confidence interval 117-307) appeared in the group with 30 years or more since first employment. The relevance of this finding, to which different factors including uncontrolled confounders such as smoking habits may have contributed, cannot be established at present. The result is suggestive, however, of an increased risk associated with the man made mineral fibres working environment of 30 or more years ago.

Europe↗
PubMed1984

Target organs for carcinogenicity of chemicals and industrial exposures in humans: a review of results in the IARC monographs on the evaluation of the carcinogenic risk of chemicals to humans.

Epidemiological observations indicate that cancers affecting different organs and systems in humans have different causes. At the descriptive level, cancer incidence and mortality rates exhibit patterns of geographic and temporal variation which are distinct and separate for each cancer site and even, at a given site, for different histological types (for instance, increasing squamous cell carcinoma of the lung and decreasing stomach cancer in most developed countries in recent decades). The existence of these distinct patterns in itself indicates that different causes are at the origin of cancers at different sites. Hence, it is of scientific and practical importance not only to identify agents that are carcinogenic to humans but also to specify as definitely as possible the target organ(s) of their action. This is done in the present review of results in the International Agency for Research on Cancer Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans.

Bibliographies as Topic↗
PubMed1983

Age characteristics of mesothelioma incidence in the general population of the province of Padova, 1965-1976.

Twenty-four incidental cases of mesothelioma, diagnosed in the province of Padova during the period 1965-1976, were analyzed according to age characteristics. The results show that the incidence rate increases in the general population under study at the same rate as in other populations occupationally and non-occupationally exposed to carcinogenic fibers according to the time since first exposure. This finding suggests a similar neoplastic process independent of age, in different environmental situations.

Adult↗
PubMed1982

Corrective measures and occupational carcinogens.

The effectiveness of corrective measures in controlling occupational cancer has been related to present knowledge on proportion of cancer due to occupational exposure. The epidemiological background of such an estimate is analyzed with particular emphasis on the limits of the method. Different types of approach in cancer prevention and control in the industrial environment and their scientific background are reviewed. Some recent examples of the application of corrective measures in industries, which in the past presented a carcinogenic risk, are analyzed. The need for a multidisciplinary approach is emphasized.

Carcinogens, Environmental↗
PubMed1981

Malignant mesothelioma and radiological chest abnormalities in two villages in Central Turkey. An epidemiological and environmental investigation.

A comparative epidemiological and environmental study in two neighbouring villages, Karain and Karlin, in Central Turkey showed an excess adult mortality, shortening of life expectancy, and an excess of pleural radiological abnormalities in Karain. This supports an earlier report of an endemic of pleural mesothelioma in the village. Concentrations of airborne respirable fibres were uniformly very low in Karlik and higher in some of the air samples from Karain, the fibres being similar in composition to those of erionite-a mineral of the zeolite family and the major contributor to the Karain clouds. This is compatible with the hypothesis of a causal association between endemic mesothelioma and inhalation of erionite fibres, but the fibre concentrations in all samples are so low as to leave in question the aetiological role of erionite. In addition to their local importance these results may have relevance for the wider scientific and public-health issue of long-term inhalation of mineral fibres at low concentrations.

Adolescent↗
PubMed1980

Descriptive epidemiology of non-Hodgkin's lymphoma in the province of Padova, 1970-1974.

The age-standardized incidence rates of non-Hodgkin's lymphoma in the province of Padova during the period 1970-1974 were 3.19/10(5)/year for males and 1.60/10(5)/year for females. These rates are similar to those found in other industrialized countries and slightly higher than in the province of Torino. An increasing trend with age is described, beginning in the age group 35-44, while low rates were found in younger ages in both sexes. No relevant pattern was shown in the geographical distribution of cases, and no observed/expected ratio was significant in any of the administrative districts considered. The influence of environmental factors and the limitations due to uncertain diagnostic criteria and the small size of the population considered are discussed.

Adolescent↗
PubMed1979

Polyvinyl chloride pneumoconiosis: epidemiological study of exposed workers.

Among 1216 workers who were employed in a polyvinyl chloride production factory and who had had no previous dust exposure elsewhere, 20 cases of pneumoconiosis were found. Chest x-ray abnormalities were characterized by limited profusion, irregular type and low gravity. All 20 workers had been exposed to high PVC dust levels. The chest x-ray changes were observed after a minimum exposure of five years and, in a small percentage of cases, were associated with slight restrictive respiratory function impairments. Moreover, in the whole group of workers 388 cases (31.9%) were found with non-specific x-ray abnormalities mainly related to age and smoking.

Adult↗
PubMedDate not supplied

Proportion of lung and bladder cancers in males resulting from occupation: a systematic approach.

Studies conducted in several countries that investigated the relationship of occupation and cancer in men were reviewed and compared. Estimates of the proportion of cancers due to occupational exposure that occurred in the general population were analyzed, and sources of variation were explored. A systematic and standardized evaluation of studies on lung and bladder cancer were undertaken, and only investigations that allowed for confounding from tobacco smoking were included. The proportion of lung cancers attributable to occupation ranged between 1 and 5% (when considering only exposure to asbestos) and 40% (in a study with a high proportion of subjects exposed to ionizing radiation); for bladder cancer, estimates were between 0 and 3% in a few studies and between 16 and 24% in several investigations. No similar attempt of systematic comparison was possible for other cancers.

Asbestos↗
PubMedDate not supplied

Descriptive epidemiology of Hodgkin's disease in the province of Padova, 1970-1974.

The age-standardized incidence rates of Hodgkin's disease in the province of Padova during the period 1970-1974 were 4.33/10(5) per year for males and 3.70/10(5) per year for females. These rates are higher (particularly for females) than in other European countries and close to those reported for North America. A bimodal distribution by age is present in the province as a whole. These findings, with the limitations due to the small population and diagnostic difficulties taken into account, are discussed with a view to further investigation.

Adolescent↗
PubMedDate not supplied

Differences in cancer mortality trends between four neighboring north-eastern areas and Italy, 1970-1990.

AIMS AND BACKGROUND: The present report combines descriptive statistics (partly never published) on four neighboring areas of north-eastern (NE) Italy [Friuli-Venezia Giulia (1970-89) and Veneto (1970-87) regions and the provinces of Trento (1970-89) and Bolzano (1971-90)], and all Italy (1970-89). The aim was to highlight potential differences in mortality trends and promote a more systematic sharing of data and methodologies. METHODS: Death certificates stratified by cause, sex, age and residence were obtained from official publications of the Italian Central Institute of Statistics. Absolute numbers of deaths from different causes, age-standardized rates (on the basis of the European standard population) and percentage of change over the examined period for both sexes were computed for each geographic area. RESULTS: Unfavorable trends were seen for neoplasms of the upper aerodigestive tract, lung, breast, colorectum, bladder, kidney and pancreas and cutaneous malignant melanoma. Increases in most of these neoplasms were more marked in the 4 NE areas than in Italy, especially with respect to cancers of the upper aerodigestive tract in both sexes and cancer of the lung and ovary in women. In Bolzano, rates of neoplasms associated with tobacco and alcohol consumption were lower and less steeply increasing than in the other NE areas, most notably Trento, therefore, contributing to produce the lowest overall cancer mortality rates of NE areas. Cancers of the stomach, uterus, and testis and Hodgkin's disease presented consistent downward trends in all examined areas. CONCLUSIONS: The analysis of mortality trends across areas is consistent with elevated and still increasing cancer rates in the 4 NE areas considered, especially for tobacco and alcohol-related neoplasms and skin melanoma. Preventive strategies, based on epidemiologic knowledge, especially against tobacco and heavy alcohol consumption, and intense intermittent sun exposure, seem to be priorities and may benefit from systematic sharing of information, expertise and intervention tools in NE Italy. At least part of the lack of cancer deaths in Bolzano must be attributable to the deaths of Bolzano residents abroad (especially in Austria) and/or to differences in coding practices. This should be elucidated in future studies.

Age Distribution↗
PubMedDate not supplied

[Development of registries].

Cancer registration took place in Italy in the first half of the Seventies with only one Cancer Registry in the province of Varese. More recently several cancer registries started their activity attaining population coverage of approximately 18% of the national population. The contribution from a network of cancer registries in Italy to the activity of cancer research and control is discussed in view of an improved exploitation of this tool.

Humans↗
PubMedDate not supplied

[Epidemiological investigation on the health status of employees in two factories manufacturing and repairing railway rolling stock: a historical perspective study of mortality].

BACKGROUND: Epidemiological studies of cancer risk due to occupational exposure to asbestos in production and repair of railway rolling stock has so far given consistent results for mesothelioma, but conflicting evidence for lung cancer. OBJECTIVES: The main purpose of this study was to investigate risk for mesothelioma and lung cancer in relation to estimated patterns of exposure in the occupational environment of railway rolling stock manufacture and repair. METHODS: A historical prospective study approach was adopted. The mortality experience of the study population was compared to that of the population of the Veneto Region. Two historical cohorts of workers employed in two plants manufacturing and repairing railway coaches were followed up for mortality. A total of 1,621 workers were enrolled in the study from the first factory, and 1,190 from the second. RESULTS: An elevation of both pleural mesothelioma and lung cancer was reported in the two factories with SMRs of 21.52 (CI 95%=1.64-32.29) and 6.46 (CI 95%=1.33-18.88), and 1.26 (CI 95%=1.01-1.54) and 1.18 (CI 95%=0.81-1.66) respectively. The two excesses however showed different patterns in relation to historical exposure estimates, which appear to correlate with mesotheliomas but not with lung cancer. An elevation of mortality for non-neoplastic respiratory diseases was associated with employment during periods when it was estimated that exposure was at higher levels in one of the two firms. CONCLUSIONS: The results confirm the high carcinogenic risk deriving from asbestos exposure, although inconsistencies were found between target organs in relation to exposure estimates, and the existence of time periods in production in which cancer risk was different.

Asbestos↗
PubMedDate not supplied

[Prevention of occupational tumors: an update].

A review is made of studies on occupational cancer conducted in different countries in order to compare estimates of the attributable risks (i.e., the proportion of cancers occurring in the general population due to occupational exposure), and to identify the sources of variation. Estimates vary according to several factors, including different study designs and chiefly, different proportions of exposed workers in the geographical areas that have been investigated. For lung cancer, estimates ranged between 1 and 35%, with values of 10-15% occurring frequently; for bladder cancer, the range was between 1 and 19%. The implications of this variability in prevention programmes are discussed and the problems encountered in the identification and compensation of occupational cancer are examined.

Humans↗