Search PubMed⌕ Search

Biomedical subjects

David H Wegman

Publications and source records attributed to David H Wegman.

24 records · Page 2Linked to original sources
PubMed2003

Measurement characteristics of peak expiratory flow.

STUDY OBJECTIVES: To evaluate features of the peak expiratory flow (PEF) test protocol, and to characterize patterns of reproducibility in multiple PEF measurements. DESIGN: Cross-sectional study. SETTING: University population. PARTICIPANTS: Two hundred twenty-three healthy adults. INTERVENTIONS: Participants recorded five PEF measurements in each of five sessions per day for 1 week. MEASUREMENTS AND RESULTS: Patterns of within-session variability were characterized using a reproducibility criterion based on a large percentage difference between best trials and evidence of a maneuver-induced bronchospasm (MIB) indicated by successive drops of PEF values in a session. Although the maximum PEF value in a session occurred on the fourth or fifth trial 32% of the time, the change in PEF values was small. Supervision was associated with small improvements in level and reproducibility. Using a cutoff of 5% for defining reproducibility, 15% of all sessions were not reproducible. When averaged over each subject, 9% of the cohort had a mean difference > 5%. Overall, MIB was unusual and observed in 8% of all test sessions; however, MIB was more common among asthmatics and subjects with wheeze, atopy, or allergies than subjects without. By contrast, poor reproducibility was more common among smokers and subjects with cough and phlegm. CONCLUSIONS: These results illustrate that it may be unnecessary to supervise all sessions or collect more than three efforts. Results also suggest that reproducibility reflects smoking-related abnormalities, whereas MIB may reflect airways hyperresponsiveness.

Adult↗
PubMed2003

Occupational health of Southeast Asian immigrants in a US city: a comparison of data sources.

OBJECTIVES: This study sought to characterize occupational injury and illness cases identified through 3 different sources of data on a population of immigrant workers. METHODS: Participants were Cambodian and Lao workers living in Lowell, Mass. A household survey allowed comparisons between characteristics of work-related cases documented in workers' compensation wage replacement records and hospital records and characteristics of self-reported cases. RESULTS: The household survey captured types of cases missing from existing data, particularly illnesses self-reported to be associated with chemical exposures. Injuries and illnesses affecting the study population appeared to be significantly underrepresented in workers' compensation wage replacement data. CONCLUSIONS: Community-based methods can supplement available occupational health data sources.

Accidents, Occupational↗
PubMed2002

Pathomechanisms of work-related musculoskeletal disorders: conceptual issues.

Work-related musculoskeletal disorders (WRMSDs) by definition are a subset of musculoskeletal disorders (MSDs) that arise out of occupational exposures. While traditional exposure assessment techniques have proved to be successful in identifying ergonomic exposures that are epidemiologically linked to these disorders, some are troubled by the lack of one-to-one correspondence between specific occupational exposure profiles and specific MSDs. In the absence of more sophisticated hypotheses that might explain the occurrence of WRMSDs in a variety of exposure patterns, the aetiologic relationships may (again) be called into question. Another unanswered question is whether specific types of WRMSDs have qualitatively different exposure-response relationships. A clearer understanding of the underlying pathomechanisms associated with specific WRMSDs could help future researchers better determine how and when various occupational exposure profiles become pathogenic. Such knowledge could also be used to design exposure assessment tools to capture exposure information more relevant to the risk of WRMSDs. The main goals of this paper are to summarize several recently described pathomechanisms, most of which have been discussed primarily in clinical and experimental literature that might not be widely read by occupational health scientists. Suggestions are made as to how future research could evaluate whether these phenomena are relevant to the effects of physical exposures and the underlying disease processes of common WRMSDs.

Disease Progression↗
PubMed2002

Occupational injury and illness surveillance: conceptual filters explain underreporting.

Occupational health surveillance data are key to effective intervention. However, the US Bureau of Labor Statistics survey significantly underestimates the incidence of work-related injuries and illnesses. Researchers supplement these statistics with data from other systems not designed for surveillance. The authors apply the filter model of Webb et al. to underreporting by the Bureau of Labor Statistics, workers' compensation wage-replacement documents, physician reporting systems, and medical records of treatment charged to workers' compensation. Mechanisms are described for the loss of cases at successive steps of documentation. Empirical findings indicate that workers repeatedly risk adverse consequences for attempting to complete these steps, while systems for ensuring their completion are weak or absent.

Accidents, Occupational↗
PubMedDate not supplied

The occupational health of Southeast Asians in Lowell: a descriptive study.

To assess the occupational health of a group of vulnerable workers, Southeast Asians, in Lowell, Massachusetts, researchers surveyed 160 residents of Cambodian or Lao ethnicity regarding working conditions, health problems, and use of medical services. Over 40% reported work in electronics and computer assembly. A fourth of those currently employed held temporary jobs. Workplace hazards included soldering fumes; inadequate ventilation; prolonged sitting or standing; awkward postures; unguarded machinery; shift work; long hours; and pressure to produce quickly. Common work-related health problems included sprains and strains, headache, dizziness, and flu-like symptoms. Less than a third of the respondents knew about workers' compensation. Household surveys can provide otherwise unavailable occupational health data for defined populations.

Adolescent↗