People are suffering from some diseases like cancer, HIV/AIDS, diabetes, hypertension, heart disease, malaria, sickle cell anemia, among others. Polio is also one of the diseases suffered by children in some developing countries. A lot of health-related problems have been bedeviling people all over the world. How to measure the diseases, determining their causes and plan the appropriate means o...

In a previous paper (Thomas, Cochrane, and Higgins, 1958) we considered some of the problems and difficulties that arise in measuring the prevalence of coronary disease in the general community. We illustrated these with two surveys of men aged 55 to 64 years, the first consisting of miners and ex-miners from the Rhondda Fach, a mining valley in South Wales, and the second of men who had never ...

Assessing the quality of an epidemiological study equates to assessing whether the inferences drawn from it are warranted when account is taken of the methods, the representativeness of the study sample, and the nature of the population from which it is drawn. Bias, confounding, and chance can threaten the quality of an epidemiological study at all its phases. Nevertheless, their presence does ...

The problem of chemically contaminated water supplies are in general terms followed by a description of three examples of water supply problems in China. A large-scale prospective epidemiological study, now in the early planning stages, to be carried out in China is also described.

Atopic dermatitis is one of the commonest childhood diseases. Large variations in the prevalence of the disease have been observed in different studies. This variation in the prevalence may be not only from genetic and environmental factors but also from methodology of estimating prevalence of the disease. In this study, Hanifin and UKWP criteria have been used in determining prevalence of the ...

background: unintentional drug intoxication is still a major cause of mortality and morbidity in young children. method & materials: in order to study changes of epidemiological indices of children intoxication during a 10-year period in hamadan province, all cases admitted to ghaem hospital from 1995-1999 were recruited, and compared with all cases admitted to the same hospital from 1990-1994....

evidence provided from studies in iran points to a possible bias in application of the standard epi cluster sampling procedure, when carried out in populations with highly variant birth rates, tends to over-represent the low birth rate, i.e. higher socio-economic, strata, and if the entity under study shows significant socio-economic gradient, then the estimates arrived at by this method might ...