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The issue of how many subjects to include in a matched set has received greater attention in case-control studies.
For the particular case of this paper, the data considered consist of N = 96 matched sets, such that the i-th matched set has j = 1,..., n i subjects, with n i ∈ {2,3,4}.
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One hundred (89.3%) matched sets had 1 case and 1 control.
After pooling cases and controls to avoid loss of information, 7 (6.3%) matched sets had 2 controls and 1 case and 5 (4.5%) matched sets had 2 cases and 1 control.
We included 192 cases and 567 controls in the study (8 matched sets had fewer than 3 controls).
Replicate gels used for making the match set had correlation coefficient value of at least 0.8.
Including only samples with the complete matched set would have limited our sample size.
The cameras are perfect replicas of one another (matched to within close tolerances in terms of the electronics) and the image sensors are taken from matched sets that have been produced in the same fabrication run (from the same silicon wafer) to guarantee equivalent performance and timing characteristics when supplied with a common clock.
What is more important than having a matched set is choosing relatives and friends who are close to you, so don't leave someone out because the numbers are uneven.
While we do not have a matched set of students to compare to, we use population data to place our students' outcomes in context.
Powe and Rogers are a matched set on defense, where scouts have trouble recalling two better tackles playing together in high school.
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