Hebatullah O. Tawfik

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Textbooks are an expression of the state of development of a discipline at a given moment in time. By reviewing eight epidemiology textbooks published over the course of a century, we have attempted to trace the evolution of five epidemiologic concepts and methods: study design (cohort studies and case-control studies), confounding, bias, interaction and(More)
OBJECTIVES The purpose of this study was to investigate the role of VEGF, NO, MDA, and Vitamin E in the pathophysiology of preeclampsia (PE) among Egyptian women. PATIENTS AND METHODS Our study included 20 pregnant women with mild PE, 40 pregnant women with severe PE, 20 normal control women and 20 normal control pregnant women. Plasma from all women were(More)
OBJECTIVE Early age at menopause is associated with increased risk of cardiovascular disease, stroke, osteoporosis, and all-cause mortality. Cigarette smoke exposure in adulthood is an established risk factor for earlier age at natural menopause and may be related to age at the menopausal transition. Using data from two US birth cohorts, we examined the(More)
OBJECTIVE Impairment of renal function may occur as a result of a variety of conditions. Progression to chronic renal-disease may be prevented by early detection. This epidemiologic study aimed at revealing the predisposing factors and determinants for the development of impaired renal function among Egyptian children. METHODS This is a case-control study(More)
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