In several studies conducted during the last decade, the synthetic fragrance hydroxyisohexyl 3-cyclohexene carboxaldehyde (HICC; CAS 31906-04-4) has been shown to be a frequent sensitizer, with a prevalence of >2% among patients tested (1–6). Recent publications, however, have reported prevalences of sensitization of <2%, both in Denmark (7) and in Germany (8). However, in the most recent re-an...

OBJECTIVE To determine the prevalence of HIV-1 infection in childbearing women in Nova Scotia. DESIGN An anonymous, unlinked seroprevalence study using "leftover" cord bloods. The study was done in 2 stages: I-Halifax Co. women delivering between February 1, 1992 and December 31, 1993; II-non-Halifax Co. women delivering between November 15, 1993 and December 15, 1994. RESULTS Of 9,115 deli...

BACKGROUND Smoking behaviour among immigrants is assumed to converge to that of the host country's majority population with increasing duration of stay. We compared smoking prevalence among Turkish immigrants residing in two different countries (Germany (DE)/the Netherlands (NL)) between and within countries by time spent in Turkey and DE/NL. METHODS The German 2009 micro-census and the Dutch...

The infectivity function is a function giving a measure of how infectious a given individual is t time units after becoming infected. Today, no feasible and ethically acceptable study design is known, which would lead to estimates of HIV-infection probability within steady heterosexual partnerships, using standard statistical methodology. In this paper a transmission model is used as a link bet...

The authors studied weighting adjustments for the National Comorbidity Survey (1990-1992), a large-scale national epidemiologic investigation of the prevalence, risk factors, and consequences of psychiatric morbidity and comorbidity in the United States. Weighting adjustments for differential selection within households, new construction, unit nonresponse, and poststratification were examined s...

Men engaged in breaking or reinstating road surfaces are exposed to vibration from mechanical tools. In view of the lack of epidemiological information on vibration white finger in such a population, a survey was carried out to identify the prevalence of symptoms of white finger in a sample of men using these tools in the gas industry and to compare the prevalence with that found in a control g...

We propose a fully cooperative coinfection model in which singly infected individuals are more likely to acquire a second disease than susceptible ones and doubly infected individuals are also assumed to be more contagious than singly infected ones. The dynamics of such a fully cooperative coinfection model is investigated through the well-mixed approach. In particular, discontinuous outbreak t...

BACKGROUND The objectives of this study were to estimate the prevalence of thalassemia and to analyze the need for public health services for migrant populations in different cities in Guangdong Province, China. METHODS A cross-sectional survey was conducted in 21 cities of Guangdong Province. Twenty-three types of a- and β-globin gene mutations were detected in a total of 14,230 pregnant wom...