center-matched

center-matched

Said of tongue-and-grooved lumber with its tongue-and-groove at the center of the piece rather than offset as in standard matched.
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Two other age-, sex-, and center-matched groups were selected from the main DESIR study population: 238 who had normal fasting glucose (defined at the time as less than 110 mg/dL) throughout the study, and 227 who had impaired fasting glucose (IFG, defined as 110-125 mg/dL) at some point during the study.