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Further information about sampling, subjects, and methods has been described elsewhere (3).
The observed cluster-specific estimates vary only because of chance created from sampling subjects.
Using convenience sampling, subjects who were 18 years of age and older and caregivers of persons with AD were recruited.
For sampling, subjects were asked to refrain from oral activity, including eating, drinking, tooth brushing, and mouthrinsing, before testing.
The three-stage weight was calculated briefly as follows: 1/[probability of sampling provinces]×[probability of sampling districts]×[probability of sampling subjects]].
Further information about sampling, subjects and methods has been described more extensively in previous papers from the index admission [ 2, 27].
Similar(48)
The 'snapshot' nature of our sampling subjected our estimates to various extrinsic sources of environmental variation.
There is wide interest in studying longitudinal surveys where sample subjects are observed successively over time.
That is, we sample subjects until we believe that no more new information can be found.
The majority of sample subjects are females which consist 75.50% and males consist 24.50%.
Sample: Subjects included 486 children with an endotracheal tube in place.
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