The development of a measure of safety climate: The role of safety perceptions and attitudes

In understanding the safety climate or culture of a workplace, the perceptions and attitudes of the workforce are important factors in assessing safety needs. Safety solutions may fail if they do not take into account these prevailing attitudes and perceptions. Also, changes in attitudes and perceptions about safety are often likely outcomes of safety interventions. The aim of this study was to develop a measure of perception and attitudes about safety as an indicator of safety culture for use with working populations. After reviewing the structure and content of a number of older, related measures of safety attitudes, a 67-item questionnaire was developed. The questionnaire was distributed in a self-administered form to 1560 workers in a wide variety of types of jobs and 660 questionnaires were returned from 7 workplaces with a response rate of 42%. Items were evaluated by Cronbach alpha which showed that the item set shared considerable common variance. Scale development was approached in two ways. First items which were highly skewed were removed, resulting in removal of around half of the items, with very little loss in alpha. The remaining items were then subjected to factor analysis which revealed five factors; personal motivation for safe behaviour, positive safety practice, risk justification, fatalism and optimism. This factor structure showed acceptable psychometric properties. Second, in an effort to produce a unidimensional scale with a small, but representative set of items, additional items were removed which had high correlation with other items. This resulted in loss of around half of the remaining items. The short scale contained 17 items with again overall acceptable psychometric properties. The most striking finding in the development of this questionnaire was that there was little variation between respondents on a very large proportion of the questions originally selected. Clearly there are well-known beliefs about safety in the working community which need to be understood in order to progress the concept of safety culture.     

Vegan diets for women,infants, and children

Infants, children, adolescents, and pregnant and lactating women have been described as groups with special needs. Regardless of diet chosen, these groups are at higher risk for nutritional deficiencies than adult males. Vegan diets can be safely used by these groups if foods, and in some instances supplements, are selected which provide a healthful and nutritionally adequate diet. Guidelines have been developed for those choosing to follow vegan diets. In many instances vegan diets offer health benefits. Studies of vegans are limited by factors such as heterogeneity of diets, the size and extent of this type of study, and difficulty in subject identification. There is a scarcity of studies of newer vegetarians who are often more mainstream than the vegetarians of the 1960s and 1970s. In some instances this has led to assumptions about today's vegans which are based on out-dated information. Thorough scientific studies of today's vegetarians, especially of those in groups with special needs, are needed.     

Megacystis-microcolon-intestinal hypoperistalsis syndrome in two male siblings

Two male sibs with severe congenital megacystis-microcolon-intestinal hypoperistalsis syndrome (MMIHS) are presented. Both had enlarged bladder and hydronephrosis due to reduced bladder emptying, decreased bowel motility, and malrotation of the colon. Repeated careful ultrasound examination of the urinary tract in the second sib failed to show significant bladder enlargement prior to 25 weeks' gestation, which has been considered to be a reliable prenatal diagnostic sign for MMIHS. Slight bilateral enlargement of the renal pelves was noted at 21 weeks' gestation, and this may represent the earliest prenatally-detectable observation in this disease. Although more females than males with this condition have been reported, our cases provide support for an autosomal recessive mode of inheritance with a similar recurrence risk for both sexes.     

Discordance between prenatal cytogenetic diagnosis and outcome of pregnancy

From 1.3.73 to 30.9.80 5580 women had an amniocentesis performed here or elsewhere; fetal chromosome analyses were carried out in this laboratory. We found 112 abnormal karyotypes (2 per cent) out of 5591 chromosome analyses. In 40 women (0.7 per cent) no cytogenetic diagnosis was obtained. Follow-up was successful in 99.5 per cent. Nine cases are reported in detail: Three cases had discrepancy between the karyotype in amniotic fluid and peripheral blood after delivery, two of these cases turned out to be 46,XX (male) while the third was prenatally determined as trisomy 21, but had a 46,XX karyotype at birth. Six cases had discrepancy between the karyotype in amniotic fluid and the phenotypic outcome at birth/abortion. One case was a prenatally undetected 45,X/46,XY mosaicism; one case was an unexplained 45,X male fetus; two cases were prenatally determined as trisomy 21, but at abortion a normal karyotype was determined and in two cases maternal cells were probably examined. The incidence of cytogeneric errors in this study was very low.     

Alternative Non-market Value-Elicitation Methods: Are the Underlying Preferences the Same?

We advocate a more formal structural approach for comparing WTP for non-market or pre-test-market goods conveyed by fundamentally different preference elicitation mechanisms. Seven independent samples of respondents were asked to value the identical good. Elicitation methods include one actual purchase and six widely used hypothetical choice formats. Using a common underlying indirect utility function (and stochastic structure) allows data for different elicitation methods to be used independently, compared pair-wise (as in much of the earlier literature) or pooled across all samples in one unified model with heteroscedasticity across elicitation methods. Our differences in estimated WTP for the individual models are typical of earlier findings. However, pooled-data models that allow for heteroscedasticity reveal that while there are substantial differences in the amount of noise in the different samples, a common underlying systematic component of the preference structure cannot be rejected for at least four (and possibly five) of these seven elicitation methods.     

Masonry fireplace emissions test method: Repeatability and sensitivity to fueling protocol

A test method for masonry fireplaces has been evaluated during testing on six masonry fireplace configurations. The method determines carbon monoxide and particulate matter emission rates (g/h) and factors (g/kg) and does not require weighing of the appliance to determine the timing of fuel loading.The intralaboratory repeatability of the test method has been determined from multiple tests on the six fireplaces. For the tested fireplaces, the ratio of the highest to lowest measured PM rate averaged 1.17 and in no case was greater than 1.32. The data suggest that some of the variation is due to differences in fuel properties.The influence of fueling protocol on emissions has also been studied. A modified fueling protocol, tested in large and small fireplaces, reduced CO and PM emission factors by roughly 40% and reduced CO and PM rates from 0 to 30%. For both of these fireplaces, emission rates were less sensitive to fueling protocol than emission factors.     

Monitoring the presence of asbestos in a residential apartment building

Asbestos was once frequently used in building materials, but airborne fibres are now associated with serious health risks. This paper discusses the properties of asbestos and the ways in which certain forms can cause disease. Risks to the health of residents of asbestos-containing building are also explored. The detection, measurement and control of airborne asbestos demands careful monitoring. A case study is presented which describes the various procedures used to investigate the potential risks to residents of an asbestos-containing apartment building. Based on this investigation, recommendations are outlined for precautionary measures, mitigation techniques and further monitoring.     

Driving safety improves after individualized training: An RCT involving older drivers in an urban area

Objective: This study aimed to reproduce the results of a previous investigation on the safety benefits of individualized training for older drivers. We modified our method to address validity and generalizability issues.

Methods: Older drivers were randomly assigned to one of the 3 arms: (1) education alone, (2) education?+?on road training, and (3) education?+?on road?+?simulator training. Older drivers were recruited from a larger urban community. At the pre- and posttests (separated by 4 to 8 weeks) participants followed driving directions using a Global Positioning System (GPS) navigation system.

Results: Our findings support the positive influence of individualized on-road training for urban-dwelling older drivers. Overall, driving safety improved among drivers who received on-road training over those who were only exposed to an education session, F(1, 40) = 11.66, P = .001 (26% reduction in total unsafe driving actions [UDAs]). Statistically significant improvements were observed on observation UDAs (e.g., scanning at intersections, etc.), compliance UDAs (e.g., incomplete stop), and procedural UDAs (e.g., position in lane).

Conclusion: This study adds to the growing evidence base in support of individualized older driver training to optimize older drivers’ safety and promote continued safe driving.     

The role of cost in remedy selection

Records of Decision from 16 environmental cleanup sites on 11 different Air Force bases were evaluated to determine if cost plays a role in remedy selection. Cost percentile (the cost of the selected remedy compared to the ranges of costs in the alternatives considered) was evaluated against the variables of risk (current and future, carcinogenic and noncarcinogenic), location, and contaminated media at the sites. Despite a statutory preference for permanent (and usually more expensive) remedies, the study found that cost is a significant factor in remedy selection. Eighty percent of the selected remedies fell in the bottom two thirds of alternatives by cost. Current carcinogenic risk and cost percentile were moderately correlated, but no significant correlation was found between the percentile of the selected remedy and future risk at the site or the location of the site. There was a moderate correlation between the contaminated medium and the percentile. Decision makers at sites with contaminated groundwater were more likely to select a high-cost alternative than sites with other contaminated media.