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Exact(12)
A total of 14 horses that matched the case definition were identified.
The controls matched the case distribution for frequencies of age, sex, ethnicity, and smoking status.
We matched the case subjects to nondiabetic control subjects on age, month and year of blood draw, and fasting status in NHS and HPFS, respectively.
Control subjects were 263 women who were free of cancer, and matched the case on cohort, menopausal status, age, and enrollment date.
The risk set for a case consisted of all women postmenopausal at enrollment who were alive and free of cancer at the time of diagnosis of the case and who matched the case on age at entry (±6 months), date of enrollment (±3 months), and number and dates (±6 months) of subsequent blood donations, if any.
Moreover, in our study design, we matched the case and control subjects not only by age and sex but also by the duration of diabetes, and the associated potential confounding medical conditions, including diabetes-related complications, were adjusted in our statistical analysis.
Similar(48)
We have also not matched the cases and controls.
We matched the cases and controls by age and they all were university students.
Controls that matched the cases in 5-year age strata were randomly selected from the Swedish Registry of Total Population.
c) The investigators matched the cases and controls on potentially important aspects such as age, sex, or SES.
Investigators said they had found a handgun in Williams' home, and the pistol matched the shell cases from the scene.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com