background and purpose: prematurity birth occurs when a newborn is born before the thirty seventh week of pregnancy. preterm birth is the most expensive and the most common health problem. so, the aim of this study was to do epidemiological survey of prematurity in gonbad-e kavous in 2010. materials and methods: this sectional- descriptive study was carried out on 172 premature babies with cens...

background: tobacco smoking is the leading cause of preventable mortality. the prevalence of smoking in adolescents in high schools ranges from 23.5% to 41%, respectively. in colombia, these figures are similar and students entering the university are exposed to initiate smoking. the purpose of this study was to establish the determinants associated with the initiation of tobacco smoking among ...

Background: Epidemiologic transition of diseases is taking place globally. Therefore, it is necessary that more work is done to unravel the situation in respect to cardiac diseases in the developing world. Aim: The research was conducted to ascertain the cardiac causes of death in adults and by extension to further unravel the epidemiologic transition in relation to cardiac diseases in the deve...

A recent article in the Journal by Whelton et al. (Am J Epidemiol. 2013;178(7):1076-1084) prompted this commentary about the use of the word "elevated" in medical reports. We believe that the word used in that particular report should have been "higher." The exposure variable was not actually elevated according to what we understand the word to mean in epidemiologic research. Consistent with th...