Abstract:
OBJECTIVES:Standardised mortality ratios (SMRs) play an important role in the epidemiological literature, particularly in evaluations of occupational hazards. While some authors have argued that comparisons of SMRs should be avoided, many investigators find such analyses appealing particularly when data are sparse. For example, calendar period-specific SMRs often are examined to identify emerging problems or to assess whether a hazard that impacted death rates in the past has abated. However, because the distribution of people with respect to age usually changes as calendar time advances, comparisons of SMRs across calendar periods can produce misleading results. METHODS:We propose a random effects model to reduce the potential bias arising from comparisons of SMRs. This approach is illustrated using data from a study of workers employed at the Department of Energy's Oak Ridge National Laboratory. RESULTS:When there is homogeneity across strata of covariates in the ratio of death rates in the target population to that in the reference population, the proposed model yields results equivalent to those obtained by a classical analysis of SMRs. However, as evidence against such homogeneity increases, the model yields a random effects version of SMRs for which patterns will conform better to those obtained from an internal analysis of rate ratios. CONCLUSIONS:The proposed random effects model can reduce potential bias arising in the comparisons of SMRs.
journal_name
Occup Environ Medjournal_title
Occupational and environmental medicineauthors
Richardson DB,Cole SR,Chu Hdoi
10.1136/oemed-2012-100792subject
Has Abstractpub_date
2013-02-01 00:00:00pages
133-9issue
2eissn
1351-0711issn
1470-7926pii
oemed-2012-100792journal_volume
70pub_type
杂志文章abstract:OBJECTIVES:Rhinitis is common, but the risk factors are not well described. To investigate the association between current rhinitis and pesticide use, we used data from 2245 Iowa commercial pesticide applicators in the Agricultural Health Study. METHODS:Using logistic regression models adjusted for age, education and ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.041798
更新日期:2009-11-01 00:00:00
abstract:OBJECTIVE:To find whether continuous ceramic filaments (CCFs) and silicon carbide whiskers (SiCWs), which are used in many industries as reinforcing materials in advanced ceramic composites, are carcinogenic in the intrapleural inoculation assay. METHODS:Samples of SiCWs, CCF, International Union Against Cancer crocid...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.53.12.813
更新日期:1996-12-01 00:00:00
abstract:OBJECTIVES:To assess the prevalence of enzyme sensitisation in the animal feed industry. METHODS:A cross sectional study was conducted in four animal feed factories, where several enzymes had been used in powder form for 7-9 years. Before this study, enzymes in liquid form had started to be used. Sensitisation to enzy...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.58.2.119
更新日期:2001-02-01 00:00:00
abstract:OBJECTIVES:Few studies have assessed the effects of policies aimed to reduce traffic-related air pollution. The aims of this study were to evaluate the impact, in terms of air quality and health effects, of two low-emission zones established in Rome in the period 2001-2005 and to assess the impact by socioeconomic posi...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2010.063750
更新日期:2012-02-01 00:00:00
abstract:OBJECTIVES:To assess if improvement of working conditions related to heat stress was associated with improved kidney health outcomes among sugarcane harvest workers in Chichigalpa, Nicaragua, a region heavily affected by the epidemic of chronic kidney disease of non-traditional origin. METHODS:Based on our findings du...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2020-106406
更新日期:2020-08-01 00:00:00
abstract:AIMS:To investigate the use of a worker based methodology to assess the physical stresses of lifting tasks on effort expended, and to associate this loading with musculoskeletal outcomes (MO). METHODS:A cross sectional study was conducted on 217 male manual handling workers from the Hong Kong area. The effects of four...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.60.10.730
更新日期:2003-10-01 00:00:00
abstract::Aerosol sampling has evolved with changes in technology and our understanding of the importance of assessing the biologically relevant fractions of the total aerosol. During the past decade there has been international agreement on the definitions for the inhalable, thoracic, and respirable fractions and instruments h...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,评审
doi:10.1136/oem.56.11.747
更新日期:1999-11-01 00:00:00
abstract:OBJECTIVES:Night shift work has been suggested as a possible risk factor for multiple sclerosis (MS). The objective of the present analysis was to prospectively evaluate the association of rotating night shift work history and MS risk in two female cohorts, the Nurses' Health Study (NHS) and NHSII. METHODS:A total of ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2019-106016
更新日期:2019-10-01 00:00:00
abstract:OBJECTIVE:Occupational exposure to agents in plastics and rubber manufacturing has been associated with elevated risk of certain cancers. We sought to evaluate cancer risk among workers employed in occupations and industries with these exposures as part of an ongoing surveillance programme in Ontario, Canada. METHODS:...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2020-106581
更新日期:2020-12-01 00:00:00
abstract:OBJECTIVE:To assess the effects of exposure to low concentrations of carbon monoxide (CO), as commonly measured in atmospheric urban air pollution and certain occupational environments, on exercise performance and myocardial perfusion in young healthy men, and the possible need for tighter restrictions on ambient conce...
journal_title:Occupational and environmental medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1136/oem.56.8.535
更新日期:1999-08-01 00:00:00
abstract:BACKGROUND:Office computer workers are at increased risk for neck/upper extremity (UE) musculoskeletal pain. METHODS:A seven-month office ergonomic intervention study evaluated the effect of two engineering controls plus training on neck/UE pain and mechanical exposures in 113 computer workers, including a 3-month fol...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,随机对照试验
doi:10.1136/oemed-2014-102160
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:Although past studies of workplace exposures have contributed greatly to our understanding of carcinogens, significant knowledge gaps still exist with regard to the actual extent of exposure among current workers, with no routinely collected population-based data being available in most countr...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2013-101651
更新日期:2014-01-01 00:00:00
abstract:BACKGROUND:Controversy still exists about the breast carcinogenic properties in humans of environmental xenoestrogens (organochlorines), justifying new investigations. AIMS:To compare the blood levels of total dichlorodiphenyltrichloroethane (DDT) and hexachlorobenzene (HCB) in samples collected at the time of breast ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.60.5.348
更新日期:2003-05-01 00:00:00
abstract:AIMS:To assess potential alterations of the nasal mucosa by clinical and histopathological evaluation of workers exposed to sulphuric acid mists at anodising plants, correlating the findings with duration of exposure and sulphuric acid concentrations in the air, and comparing them with a control group. METHODS:Fifty t...
journal_title:Occupational and environmental medicine
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1136/oem.60.6.395
更新日期:2003-06-01 00:00:00
abstract::As part of an epidemiological study rat urinary aeroallergen (RUA) and total dust concentrations were measured at three research establishments. Personal RUA measurements in nine exposure groups over a workshift showed highest exposure for animal technicians (geometric mean (GM) = 32.4 micrograms/m3) and lowest for wo...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.51.9.593
更新日期:1994-09-01 00:00:00
abstract:OBJECTIVES:To determine cell differential counts and the number of asbestos bodies (ABs) in bronchoalveolar lavage (BAL) fluid obtained from patients with asbestosis, and to correlate the results with their survival. METHODS:The BAL cell differential counts and ABs from 91 patients with asbestosis were determined. The...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2018-105606
更新日期:2019-10-01 00:00:00
abstract:AIMS:To investigate the acute systemic inflammatory response to welding fume exposure. METHODS:Twenty four welders (42% smokers) and 13 non-exposed controls (23% smokers) were monitored at a welding school. Exposure to fine particulate matter (PM2.5) was assessed using cyclone samplers. Markers of systemic inflammatio...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2004.014795
更新日期:2005-03-01 00:00:00
abstract:AIMS:To evaluate the mortality experience of a cohort of employees in the UK silica sand industry exposed to respirable crystalline silica (RCS). METHODS:A retrospective cohort mortality study followed all workers to 2001 with at least one year's employment at one of seven UK silica sand producing quarries between 195...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2004.017731
更新日期:2005-07-01 00:00:00
abstract:OBJECTIVES:To estimate the risk of lymphoma among farmers in Spain. METHODS:This is a multicentre case control study conducted in Spain. Cases were subjects diagnosed with lymphoma according to the World Health Organization (WHO) classification in four hospitals between 1998-2002. Hospital controls were frequency matc...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,多中心研究
doi:10.1136/oem.2005.024026
更新日期:2006-10-01 00:00:00
abstract:OBJECTIVES:To investigate whether an increased risk of cardiovascular disease might be caused by increased arrhythmogeneity and by unfavourable changes in autonomic cardiac control the changes in the occurrence of premature complexes (PVCs) and in heart rate variability (HRV) were studied in subjects who started to wor...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.58.10.678
更新日期:2001-10-01 00:00:00
abstract:OBJECTIVES:To explore the significance of the increase in urinary excretion of the lysosomal enzyme beta-N-acetylglucosaminidase (NAG) at low exposures to cadmium (Cd) that is frequently found in the absence of any other sign of renal dysfunction. METHODS:The activity was measured of the two main isoenzymes of NAG (NA...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.52.3.177
更新日期:1995-03-01 00:00:00
abstract:AIMS:To determine obstacles for return-to-work in disability management of low back pain patients sicklisted for 3-4 months. METHODS:A cohort of 467 low back pain patients sicklisted for 3-4 months was recruited. A questionnaire was sent to their occupational physicians (OPs) concerning the medical management, obstacl...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.59.11.729
更新日期:2002-11-01 00:00:00
abstract:OBJECTIVES:Trichloroethylene (TCE) -induced hypersensitivity syndrome (TIHS) is a potentially life-threatening disease. Several genetic susceptibility biomarkers have been found to be associated with TIHS, and this systematic prospective study has been conducted to evaluate the utility of these genetic susceptibility b...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2019-106171
更新日期:2020-03-01 00:00:00
abstract:OBJECTIVES:To determine whether employees in the automobile industry in Michigan are at elevated risk of urinary bladder cancer. METHODS:The authors conducted a population-based case-control study including 418 cases and 571 controls. History of employment within the automobile industry was coded according to the US C...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.041616
更新日期:2009-10-01 00:00:00
abstract:AIMS:To describe the age standardised prevalence of symptomatic osteoarthritis (OA) in a nationwide cross sectional survey of 10 412 patients in France, and their functional and work limitations. METHODS:Cases in the survey were compared with their expected counterpart by age, gender, and occupational groupings using ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.60.11.882
更新日期:2003-11-01 00:00:00
abstract:OBJECTIVES:To describe workers with low back symptoms, to identify risk factors and to assess the occupational consequences separately in men and women. METHODS:A descriptive study was conducted between 1 October 1996 and 31 December 1996 in a sample of workers selected at random from all types of small companies in t...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.56.10.696
更新日期:1999-10-01 00:00:00
abstract:OBJECTIVE:Violence from care recipients and family members, including both verbal and physical abuse, is a serious occupational hazard for healthcare and social assistance workers. Most workplace violence studies in this sector focus on hospitals and other institutional settings. This study examined verbal abuse in a l...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2018-105604
更新日期:2019-07-01 00:00:00
abstract:OBJECTIVE:To carry out a comprehensive field investigation to evaluate various conventional and recently developed biomarkers for exposure to low concentrations of benzene. METHODS:Analyses were carried out on environmental air, unmetabolised benzene in blood and urine, urinary trans, transmuconic acid, and three majo...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.53.5.328
更新日期:1996-05-01 00:00:00
abstract:OBJECTIVES:To determine the concentrations of blood lead (PbB) in pregnant women in the slums of Lucknow, north India. METHODS:Of the 203 designated municipal slums in Lucknow, 70 were randomly selected for study and a cohort of 500 pregnant women was enrolled. Each participant was interviewed with questions on possib...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.53.12.836
更新日期:1996-12-01 00:00:00
abstract::Four workers chronically exposed to elemental mental mercury in a lampsocket manufacturing factory were studied. The clinical manifestations were severe in one, mild in another, and suspicious in the remaining two. Correlation between severity of clinical features and increased urinary mercury concentrations was found...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.51.4.267
更新日期:1994-04-01 00:00:00