To eliminate the problem of heterogeneity in many practical populations, researchers have considered the unconditional survival function of the additive hazards model (cf. [7 9]).
The MSc includes a field visit to the WSPH Agincourt Health and Demographic Surveillance Site based in a rural sub-district of South Africa where students gain practical, population-based exposure to the application of epidemiology and biostatistics [ 9].
For description of dispersed phases in many practical applications, population balance equations (PBE) of entities under investigation are coupled with the thermo-fluid dynamics of the surrounding fluid.
However further validation experiments using high risk groups of lung cancer as the controls (such as heavy smokers or COPD patients) will be necessary to prove the specificity and clinical usefulness of our biomarkers because more practical target population of the early diagnosis of lung cancer should be them rather than healthy individuals.
SSCP and DGGE are expensive and time-consuming to be practical for population screening.
These questionnaires are cheaper and practical for population surveys and they can provide an assessment of all respondents.
Quantification of an individual's exposure is imprecise without either a completely controlled environment or portable sampling equipment – both of which are not practical for population cohort studies.
Self-reported BMI although practical in population based studies such as the current study has well acknowledged limitations [ 43] therefore future studies are encouraged to use objective measures of body composition to confirm the pattern of results observed in the current study.
Also similar to the analysis of Rohlfs et al. (2012), for the practical setting, population-genetic match probabilities appear in a context of population differences in the frequencies with which individuals are represented in transplantation databases.
In addition, riverine habitats in interior regions supported smaller, but practical, otter populations.
First, from a practical perspective, population-wide implementation of approaches can make it difficult to find a suitable number of control subjects.
