Social class standardisation has been proposed as a method for separating the effects of occupation and "social" or "lifestyle" factors in epidemiological studies, by comparing workers in a particular occupation with other workers in the same social class. The validity of this method rests upon two assumptions: (1) that social factors have the same effect in all occupational groups in the same ...

BACKGROUND Dogs are popular pets in many countries. Identifying differences between those who own dogs or have contact with dogs, and those who do not, is useful to those interested in the human-animal bond, human health and for provision of veterinary services. This census-based, epidemiological study aimed to investigate factors associated with dog ownership and contact with dogs, in a semi-r...

Genetic epidemiology is increasingly focused on the study of common diseases with both genetic and environmental determinants. The concept of geneenvironment interaction is becoming a central theme in epidemiologic studies that assess causes of human disease in populations (1). Advances in genetic technology and the work of the Human Genome Project will make it easier for the study of gene-envi...

BACKGROUND Often in survey research, subsets of the population invited to complete the survey do not respond in a timely manner and valuable resources are expended in recontact efforts. Various methods of improving response have been offered, such as reducing questionnaire length, offering incentives, and utilizing reminders; however, these methods can be costly. Utilizing characteristics of ea...

Descriptive epidemiology research involves collecting data from large numbers of subjects. Obtaining these data requires approaches designed to achieve maximum participation or response rates among respondents possessing the desired information. We analyze participation and response rates in a population-based epidemiological study though a telephone survey and identify factors implicated in co...

background: in iran, methyl alcohol poisoning rarely occurs accidentally and usually occurs through abuse of contaminated ethanol. however, with proper and timely treatment complications and mortality of methanol poisoning can be prevented. in this study, the epidemiological profile of methanol poisoning in the iranian society was investigated. methods: in this prospective cross-sectional study...