Statistical epidemiology is an emerging branch of the disciplines of epidemiology and biostatistics that aims to: ... Recognise the importance of applied statistics, especially with respect to the context in which statistical methods are appropriate and inappropriate. Aid and improve our interpretation of observations.Statistical epidemiology. Statistical epidemiology is an emerging branch of the disciplines of epidemiology and biostatistics that aims to: Bring more statistical rigour to bear in the field of epidemiologypidemiology is the study (scientific, systematic, and data-driven) of the distribution (frequency, pattern) and determinants (causes, risk factors) of health-related states and events (not just diseases) in specified populations (neighborhood, school, city, state, country, global).Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and determinants of health and disease conditions in defined populations.Cohort studies are best for studying the natural progression of disease or risk factors for disease; case-control studies are much quicker and less expensive. Cross-sectional studies provide a snapshot of a disease or condition at one time, and we must be cautious in inferring disease progression from them.Epidemiologists are public health professionals who investigate patterns and causes of disease and injury in humans. They seek to reduce the risk and occurrence of negative health outcomes through research, community education and health policy