The School Health Initiative: Environment, Learning, and Disease (SHIELD) study used a probability sample of children (second through fifth grades) from two low-income and racially mixed neighborhoods of Minneapolis, Minnesota, to assess childhood environmental health.
15, 46, 47, 63– 66 A prospective cohort study which used a probability sample of the US population found that self-reported intention to lose weight was associated with lower all-cause mortality, independent of weight change, perhaps because weight loss attempts were a marker of other healthy behaviors.
Households in each neighborhood were selected using a probability sampling approach, and participants within households were selected purposively as described below.
It is a household survey, conducted using a probability sampling technique so that the results are reproducible and generalisable over the population.
A notable strength of this study is that study participants from diverse ethnic groups were selected using a probability sampling method.
Callers who were pregnant, Medicaid-insured, oreporteded having a MHC were oversampled using a probability sampling scheme in the North Carolina evaluations.
In the present study, a brucellosis herd prevalence and individual animal prevalence were observed in urban and peri-urban areas of Kampala using a probability sampling framework and a highly sensitive and specific diagnostic test: the CELISA.
The KNHANES, a nationwide survey which obtains national-level health statistics, ensured that the samples were representatives of the population by selecting subjects using a probability sampling method [ 22].
A study was considered to be of a good quality if the sample size was determined by considering expected prevalence and desired precision of the estimate; animals were sampled by using a probability sampling method; bacterial isolation and identification were done by using steps that involved pre enrichment, selective enrichment and biochemical tests.
Here we develop and test a method for estimating in-season crop acreage using a probability sample of field visits and producing wall-to-wall crop type maps at national scales.
