Reply: Epidemiologic studies need asymptomatic controls

why we still need hbv population-based epidemiologic studies

Why We Still Need HBV Population-Based Epidemiologic Studies

DOI: 10.5812/hepatmon.842 Copyright c 2012 Kowsar M.P.Co. All rights reserved. Implication for health policy/practice/research/medical education: Hepatitis B is a common viral disease that highly appears among high risk groups. Therefore, study of this article is recommended to the epidemiologists, hepatologists, virologists and other researchers who are interested in the field of public health.

Types of Epidemiologic Studies

Discussion: Epidemiologic Studies

What is the distribution and population density of ticks transmitting the Lyme spirochete? Data on tick distribution are scarce. Ixodes dammini appears to be limited to sea-level ecosystems, whereas L pacificus populations are adequate up to 7,000 feet elevation. Three cases of Lyme disease had their exposure above 5,000 feet in the Sierras of northern California. The nymphal tick is very small...

Sample size estimation in epidemiologic studies

This review basically provided a conceptual framework for sample size calculation in epidemiologic studies with various designs and outcomes. The formula requirement of sample size was drawn based on statistical principles for both descriptive and comparative studies. The required sample size was estimated and presented graphically with different effect sizes and power of statistical test at 95...