Sometimes a new map of residences must be made, or old maps of an area updated, before a valid selection of residences is possible.
Fourth, we did not control for selection effects, i.e., parents' strategic choice of residence related to the supply of specific educational alternatives.
Effective design of adsorption media reactors is highly dependent on selection of the hydraulic residence time when scaling up a pilot-scale reactor to a field-scale reactor.
Select the country of residence.
All final models were adjusted for age and year of selection (matching variables), race, region of residence, median-household income by zip code of residence, history of mammography, and history of immunosuppressive therapy as defined earlier.
Unlike disease-specific biobanks, the MCB selects participants based neither on disease nor on exposure history, but rather on some other selection factors such as location of residence or source of clinical care [ 23].
First, the participants were recruited from a pan-Canadian sampling frame using a random sampling methodology, thus eliminating selection biases associated with region of residence or location of recruitment (e.g., recruiting visitors to doctors' offices instead of recruiting a broader, national sample).
Potential bias from differing probabilities of selection in the sample is addressed by weighting by age, gender, probability of selection in the household, and area of residence to the most recent estimates of residential population, derived from census data by the Australian Bureau of Statistics.
Regarding region of residence, there is no selection before or after matching (not in table).
The final selection of these two parameters, the residence time and temperature, is influenced by the pretreatment strategy as well as the physical accessibility and type of raw material.
