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Then we randomly select n 1 cases and n 0 controls from this population to form a main study sample.
As it was an accompanying research project, inclusion and exclusion criteria for participants were equal to those of the main study sample.
The group of second cancer cases and their matched controls is the main study sample.
This pilot sample was not included as part of the main study sample.
The package mailed to the main study sample was in the member's stated language preference.
Characteristics of this subsample (N = 9 271) were similar to those of the main study sample.
Similar(43)
As the study reported here was nested within our main study, the sample size was constrained by the sample size needed to achieve the main studies objectives.
One of the limitations of the current study was the unequal distribution of age in the main study's sample.
Participants from higher social class households were overrepresented in the current follow-up study, although this broadly mirrors the main Twenty-07 Study sample.
In the main study, a convenience sample of 260 parents of 2- to 5-year-old children in Isfahan and Tehran were invited to complete the final Farsi version of the ECOHIS (F-ECOHIS) and answer two global self-rating questions about their children's dental appearance and oral health.
At initial recruitment within the main study baseline stool samples had not been collected.
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CEO of Professional Science Editing for Scientists @ prosciediting.com