Abstract:
OBJECTIVES:Many residents in Beijing use disposable face masks in an attempt to protect their health from high particulate matter (PM) concentrations. Retail masks may be certified to local or international standards, but their real-life performance may not confer the exposure reduction potential that is marketed. This study aimed to evaluate the effectiveness of a range of face masks that are commercially available in China. METHODS:Nine masks claiming protection against fine PM (PM2.5) were purchased from consumer outlets in Beijing. The masks' filtration efficiency was tested by drawing airborne diesel exhaust through a section of the material and measuring the PM2.5 and black carbon (BC) concentrations upstream and downstream of the filtering medium. Four masks were selected for testing on volunteers. Volunteers were exposed to diesel exhaust inside an experimental chamber while performing sedentary tasks and active tasks. BC concentrations were continuously monitored inside and outside the mask. RESULTS:The mean per cent penetration for each mask material ranged from 0.26% to 29%, depending on the flow rate and mask material. In the volunteer tests, the average total inward leakage (TIL) of BC ranged from 3% to 68% in the sedentary tests and from 7% to 66% in the active tests. Only one mask type tested showed an average TIL of less than 10%, under both test conditions. CONCLUSIONS:Many commercially available face masks may not provide adequate protection, primarily due to poor facial fit. Our results indicate that further attention should be given to mask design and providing evidence-based guidance to consumers.
journal_name
Occup Environ Medjournal_title
Occupational and environmental medicineauthors
Cherrie JW,Apsley A,Cowie H,Steinle S,Mueller W,Lin C,Horwell CJ,Sleeuwenhoek A,Loh Mdoi
10.1136/oemed-2017-104765subject
Has Abstractpub_date
2018-06-01 00:00:00pages
446-452issue
6eissn
1351-0711issn
1470-7926pii
oemed-2017-104765journal_volume
75pub_type
杂志文章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:OBJECTIVES:To evaluate work experiences among teens enrolled in school-sponsored work (SSW) programs and compare the findings to other-working teens. This study, the first to assess work-related safety and health for teens in SSW programs, includes teens working one job and teens working multiple jobs. METHODS:A surve...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2010.059170
更新日期:2011-11-01 00:00:00
abstract::Worldwide, millions of office workers use a computer. Reports of adverse health effects due to computer use have received considerable media attention. This systematic review summarises the evidence for a relationship between the duration of work time spent using the computer and the incidence of hand-arm and neck-sho...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,评审
doi:10.1136/oem.2006.026468
更新日期:2007-04-01 00:00:00
abstract:OBJECTIVES:To identify determinants of sickness absence in hospital physicians. METHODS:The Poisson regression analyses of short (1--3 days) and long (>3 days) recorded spells of sickness absence relating to potential determinants of sickness absence were based on a 2 year follow up period and cohorts of 447 (251 male...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,多中心研究
doi:10.1136/oem.58.6.361
更新日期:2001-06-01 00:00:00
abstract:OBJECTIVE:To investigate the risk of cancer associated with exposure to air pollution among bus drivers and tramway employees. METHODS:A retrospective cohort study of 18,174 bus drivers or tramway employees in Copenhagen in the period 1900-94. Data on employment were obtained from company files. Information on cancer ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.55.9.594
更新日期:1998-09-01 00:00:00
abstract:OBJECTIVES:The study investigated the utility of unmetabolised naphthalene (Nap) and phenanthrene (Phe) in urine as surrogates for exposures to mixtures of polycyclic aromatic hydrocarbons (PAHs). METHODS:The report included workers exposed to diesel exhausts (low PAH exposure level, n = 39) as well as those exposed t...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.041418
更新日期:2009-02-01 00:00:00
abstract:AIMS:To correlate the prevalence of respiratory tract symptoms and diseases with dust and fibre exposure in the soft tissue industry in Germany. METHODS:Ambient monitoring was performed for inhalable, respirable dust and fibres in seven soft tissue producing factories. In 441 workers (72 controls, 90 moderate, 279 hig...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.59.12.830
更新日期:2002-12-01 00:00:00
abstract:OBJECTIVES:To examine if the occurrence of different cancers was increased among rubber workers, as the highest known exposures of humans to nitrosamines have occurred in the rubber industry. METHODS:A cohort of 8933 rubber workers (hired after 1 January 1950, still active or retired on 1 January 1981 and employed for...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.57.3.180
更新日期:2000-03-01 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:BACKGROUND:Two main theoretical models have been used to assess the impact of psychosocial work factors on blood pressure (BP): the demand-control model (DC) and the effort-reward imbalance (ERI) model. Little is known about their independent and combined effect. OBJECTIVE:To examine the independent and combined effec...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2013-101416
更新日期:2013-11-01 00:00:00
abstract:OBJECTIVES:Occupational pesticide exposure is associated with a wide range of diseases, including lung diseases, but it is largely unknown how pesticides influence airway disease pathogenesis. A potential mechanism might be through epigenetic mechanisms, like DNA methylation. Therefore, we assessed associations between...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104787
更新日期:2018-06-01 00:00:00
abstract:AIM:To determine whether kneeling or squatting for prolonged periods is sufficiently causally associated with an increased risk of injury or degenerative disease of the knee joint as to meet the classic criteria to be considered an occupational disease of coal miners for whom these are or have been routine working post...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,评审
doi:10.1136/oem.2004.017137
更新日期:2005-08-01 00:00:00
abstract:OBJECTIVES:To investigate the question of whether there is an association between workplace exposures and sociodemographic factors and mortality from non-malignant respiratory disease excluding influenza and pneumonia (NMRDxIP) among workers in a fibreglass wool manufacturing facility. METHODS:A case-control study wit...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.59.6.369
更新日期:2002-06-01 00:00:00
abstract:BACKGROUND AND AIMS:Work related asthma (WRA) is one of the most frequently reported occupational lung diseases in a number of industrialised countries. A better understanding of work aggravated asthma (WAA), as well as work related new onset asthma (NOA), is needed to aid in prevention efforts. METHODS:WAA and NOA in...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2003.008177
更新日期:2004-06-01 00:00:00
abstract:OBJECTIVES:To investigate the relation between fluctuations in personal exposure to nitrogen dioxide (NO(2)) in school children and changes in outdoor NO(2) concentrations. METHODS:114 Asthmatic school children aged 7-12 years were recruited from the Southampton area. Weekly average personal exposures to NO(2) were me...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.57.7.472
更新日期:2000-07-01 00:00:00
abstract:AIMS:To assess the prevalence of general health status, use of sleep medication, and use of medication for cardiovascular diseases, and to study their relation to aircraft noise exposure. METHODS:These health indicators were measured by a cross-sectional survey among 11 812 respondents living within a radius of 25 km ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2002.005488
更新日期:2004-05-01 00:00:00
abstract:OBJECTIVES:Epidemiological studies have shown inconsistent effects on immunological parameters in subjects exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). In this study we investigated changes in humoral immunity and prevalence of atopic diseases among workers from a Dutch historical cohort occupationally expose...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2010.058016
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVES:Animal evidence shows that N-nitrosamines and similar xenobiotic compounds are pancreatic carcinogens. We aimed to determine whether occupational exposure to N-nitrosamines or to pesticides increases risk of pancreatic cancer development. METHODS:Participants (504 cases, 643 controls) in a population-based ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2014-102522
更新日期:2015-09-01 00:00:00
abstract:OBJECTIVE:Several animal, fish and/or shellfish derived substances encountered in the workplace can initiate or exacerbate asthma. The aims of this study were: to produce a population-based estimate of the current prevalence of occupational exposure to animal, fish and/or shellfish derived asthmagens, to identify the m...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104459
更新日期:2018-04-01 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:OBJECTIVE:To report the effects of bleach use at home on the frequency of infections in 9102 school-age children participating in the HITEA project. METHODS:Parents of pupils aged 6-12 years from schools in Barcelona province (Spain), Utrecht province (the Netherlands) and Eastern and Central Finland were administered...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2014-102701
更新日期:2015-08-01 00:00:00
abstract:OBJECTIVE:Interpretation of epidemiological studies on health effects from mobile phone use is hindered by uncertainties in the exposure assessment. We used a newly developed smartphone application (app) to validate self-reported mobile phone use and behaviour among adults. METHODS:107 participants (mean age 41.4 year...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2015-102808
更新日期:2015-11-01 00:00:00
abstract:OBJECTIVES:Shift-related sleep and sleepiness problems may be due to characteristics of both shifts (ie, day, evening and night shifts) and work schedules (ie, permanent vs rotational schedules). The Bergen Shift Work Sleep Questionnaire (BSWSQ) was used to investigate associations between shift-related sleep problems ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2012-101091
更新日期:2013-04-01 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:There have been few studies of work history and mortality risks in medical radiation workers. We expanded by 11 years and more outcomes our previous study of mortality risks and work history, a proxy for radiation exposure. METHODS:Using Cox proportional hazards models, we estimated mortality risks accordin...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2013-101859
更新日期:2014-12-01 00:00:00
abstract:OBJECTIVES:To investigate the association between occupational exposure to disinfectants/antiseptics used for hand hygiene and asthma control in nurses. METHODS:In 2014, we invited female nurses with asthma drawn from the Nurses' Health Study II to complete two supplemental questionnaires on their occupation and asthm...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2017-104740
更新日期:2018-05-01 00:00:00
abstract:OBJECTIVES:Professional judgment is necessary to assess occupational exposure in population-based case-control studies; however, the assessments lack transparency and are time-consuming to perform. To improve transparency and efficiency, we systematically applied decision rules to questionnaire responses to assess dies...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oemed-2011-100524
更新日期:2012-10-01 00:00:00
abstract:OBJECTIVES:To examine the relationship between protease exposure and respiratory disease in a cohort of detergent enzyme manufacturers. METHODS:Case-referent analysis of a cohort of employees working in a European detergent factory between 1989 and 2002. Cases with new lower or upper respiratory disease were ascertain...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.2008.043851
更新日期:2009-11-01 00:00:00
abstract:CONTEXT:More than 400,000 workers annually receive a measurable radiation dose and may be at increased risk of radiation-induced leukaemia. It is unclear whether leukaemia risk is elevated with protracted, low-dose exposure. OBJECTIVE:We conducted a meta-analysis examining the relationship between protracted low-dose ...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章,meta分析,评审
doi:10.1136/oem.2009.054684
更新日期:2011-06-01 00:00:00
abstract:BACKGROUND:Serious delayed neuropsychological sequelae may complicate carbon monoxide intoxication. The existence of minor manifestations, especially memory disturbances, is not well documented. AIMS:To study several memory functions after carbon monoxide intoxication. METHODS:In a prospective study, 32 poisoned pati...
journal_title:Occupational and environmental medicine
pub_type: 杂志文章
doi:10.1136/oem.60.3.212
更新日期:2003-03-01 00:00:00