[Sun protection by optimally designed fabrics]. / Sonnenschutz durch optimierte Stoffe.

A rising incidence worldwide of skin cancer has been observed for years. A high cumulative exposure to UV radiation is a major factor in the development of such neoplasms. Suitable protective measures are therefore becoming increasingly important. Textiles provide simple, effective and medically safe protection against UV radiation. At present, however, in Europe--in contrast to Australia--the UV protection factor (UPF) for summer textiles is not stated. It is a largely unknown fact that by far not all textiles offer sufficient protection. Our goal was to study the factors which determine the UV transmission of fabrics and, based on these findings, to design materials which provide enhanced protection. A spectrophotometric method was used to determine the UV transmission by fabrics made of cotton, silk, polyester and viscose. The UV protection factors of the fabrics were computed on the basis of the transmission data. The UV protection factor is dependent on the type of fibre, yarn and surface design, weight per square metre, moisture content, colour, finishing method and degree of wear. To optimize the UV protection via textiles, a viscose yarn with a low UV transmission was used. This yarn makes it possible to design light-weight summer fabrics with optimized UV protection. This development will make it possible to offer clothing with high UV protection on the European marked. This clothing will not be more expensive than normal products, so that effective prevention should be more available.

Development and validation of the Parent Health Locus of Control scales.

We describe the development and validation of the Parent Health Locus of Control (PHLOC) scales. Using factor analytic and item analytic methods, 30 items comprising six scales were extracted from a pool of 84 items. The individual scales correspond to beliefs in Child, Divine, Fate, Media, Parental, and Professional Influence over child health. Results were compared for six samples totalling 822 parents. Internal consistency reliabilities were above .70 for all scales with all samples. Test-retest correlations based on a separate sample were all above .60. Validity was assessed by means of a known groups strategy that made use of presumed differences among the six samples studied. The results generally agreed with predicted differences, offering good initial evidence of the validity for the PHLOC scales.

Optimistic biases in public perceptions of the risk from radon.

Survey data were obtained from a random sample of 657 homeowners in New Jersey and also from 141 homeowners who had already monitored their homes for radon. People who had not tested tended to believe that they were less at risk than their neighbors, and they interpreted ambiguous predictors of home radon levels in ways that supported their beliefs of below-average risk. Residents who had already tested their homes were relatively accurate about the probability of health effects. In both groups less than half of those who knew that radon can cause lung cancer were willing to admit that it would be serious if they suffered health effects from this source. The optimistic biases of the public may hamper attempts to encourage home radon monitoring and to promote appropriate mitigation measures in homes with elevated radon concentrations.