For example, phase I of the International Study of Asthma and Allergies in Childhood (Asher et al. 1995; Pearce et al. 1993) involved asthma prevalence studies in children in 155 centers in 56 countries (Beasley et al. 1998), and the initial prevalence studies were in many instances used as basis for more detailed prevalence case control studies (e.g., Wickens et al. 1999).
This review summarizes findings involving the prevalence and characteristics of sleep problems often experienced by children with epilepsy.
Propositions are presented involving the prevalence of codes of ethics, issues relating to bribery of public officials, and treatment of low-level employees.
Clare Matterson, head of policy at the Wellcome Trust, agrees, and says the problems highlighted in the report are part of a wider picture involving the prevalence of short-term contracts and the lack of career structure for all researchers, regardless of gender.
In addition to tests of proportions involving smoking prevalence, quit attempts as well as the success of those attempts also were examined.
Such an epidemiologic transition involves declining prevalence of infectious diseases and acceleration of chronic disease, such as cardiovascular disease, obesity, and cancer.
Although there is no consensus on the origins of the socioeconomic gradient in health, one of the suggested pathways involves higher prevalence of poor health behaviours (eg, physical inactivity and smoking) among lower socioeconomic groups.
For the larger study involving viral prevalence, from which these cases and controls were drawn, 1,955 potential controls were approached, with a refusal rate of about 8% (Mathisen et al. 2010).
We know that natural selection is involved in their prevalence, mainly from the fact that there is a strong geographical correlation between their prevalence and the incidence of malaria (reviewed in [ 231, 233]).
The identification of all risk factors involved in HSV1 prevalence is essential to alleviate the burden of HSV infection.
