Measurement of asbestos emissions associated with demolition of abandoned residential dwellings

Many cities are revitalizing their urban cores through the demolition of abandoned residential dwellings (ARDs). However, data regarding the emissions of asbestos during such an operation are sparse. We measured airborne asbestos emissions from emergency demolitions (demolitions on structures deemed too dangerous to enter and remove asbestos) of ARDs in Detroit. High-flow air sampling was conducted during ARD demolitions. Air samples were analyzed using Phased Contrast Microscopy (PCM), and a subset using Transmission Electron Microscopy (TEM). One hundred and one air samples were collected on 25 emergency demolitions. Fifty-four of the 101 PCM samples (53%) exceeded the limit of detection (LOD). However, only 2 of 46 TEM samples (4%) exceeded the LOD for asbestos; these latter samples were from two different demolitions and each contained a single chrysotile asbestos fiber. Using conservative exposure assumptions and commonly-accepted risk estimation formulae, we estimated the lifetime risk of mesothelioma and lung cancer combined to be less than one case per one million people. Emissions of airborne asbestos during emergency (unabated) ARD demolition operations appear to be negligible. As a result, the associated health risk for asbestos-related disease is also negligible. Reconsideration of current regulatory mandates for asbestos abatement in ARDs may be warranted.

Equestrian-related injuries, predictors of fatalities, and the impact on the public health system in Sweden

OBJECTIVES

Horse riding is a popular activity but has also been found to lead to many injuries and even fatalities. No reduction in the numbers of those being admitted to hospital for equestrian-related injuries have been seen in Sweden in recent years. The aim of this work was to examine injuries, fatalities, and predictors of fatalities in equestrian-related activities and to investigate the cost of these injuries to the public health system.

STUDY DESIGN

The study is a retrospective analysis of hospital data.

METHODS

National Swedish hospital and mortality registers were retrospectively examined, inclusive of the years 1997-2014. Logistic regression was used to examine the predictors of fatal injuries, and cost of hospital treatment was considered.

RESULTS

Over the study period, there were an observed 29,850 injured cases and 51 fatalities. Women comprized almost 90% of those injured and 70% of fatalities. The average age was 26.8 years (range 0-91, standard deviation [SD] = 16.1) for injured and 43 years (range 7-78 years, SD = 20.5) for fatal cases. Men dominated both injured and fatal samples in the older age ranges (Fatal: >50 years; Injured: >70 years), although overall numbers were small. Injuries to the head contributed more than any other body region for both injured and fatal cases, and fractures were the most frequently seen injury type. A chi-squared analysis confirmed that injury type and injured body region were not independent of age. Logistic regression examining the association between fatality and age, gender, home region, and year of injury, indicating trends over time, found that there was an increase of 5.1% in the odds of fatality for every year increase in age of the patient and men had 2.2 times higher odds to be in the fatal sample than women. The conservative estimated cost of injury was 1800 Euro per injury event, equating to over 3 million Euro per year.

CONCLUSION

Equestrian-related injury events present a major public health concern. Observed decreases in fatalities suggest improved health care, yet head injury and fatality rates are still high, indicating a need for further intervention. The type of injury changes with the age group, and a better understanding of injury patterns with age is needed to identify protective measures for the different user groups.