Since districts were defined by population, one can infer that the area was underdeveloped and sparsely populated at the time.
The degree of urbanization was defined by population and certain development-related conditions.
The urbanisation of a patient's home city was defined by population and certain indicators of the city's level of development.
Urban status of residence was defined by population size and place of residence, and categorized into two groups: central or fringe counties of metropolitan areas with population size of ≥ 1 million versus all other areas.
The urbanization level of the place of residence was defined by population density: capital city area (the capital Helsinki and the adjoining towns), other towns, villages in rural municipality, and sparsely populated rural areas (isolated homesteads in rural municipalities).
However, there is great variability in their threshold levels; as can be seen in Table 1, usually the cut-off values of HOMA-IR were defined by population-based percentiles criteria.
The natural history of HIV-1 among the infected subjects seemed to be defined by sequential population bottlenecks characterized by temporally ordered patterns of amino acid substitutions.
Thus these bodies are not intended to cover populations bounded by census-defined geographical boundaries (as were the primary care trusts before them), rather they are to be defined by the populations registered with their constituent general practices.
The inclusion and exclusion of studies may be defined by factors including population characteristics, health or clinical topic, methods and methodology (philosophical approach), language, time frame, or type of publication; and this should be justified.
Since time activity patterns largely influence personal exposure to compounds as individuals move across microenvironments, exposure subgroups within the population may be defined by factors that influence daily activity patterns.
