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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.
Because we individually matched the cases and controls, we maintained this control of potential confounders in the analysis by leukemia subtype.
We randomly selected controls, who matched the cases in 5-year age strata, from the Swedish registry of the total population.
Similar(52)
The controls matched the case distribution for frequencies of age, sex, ethnicity, and smoking status.
A total of 14 horses that matched the case definition were identified.
Investigators said they had found a handgun in Williams' home, and the pistol matched the shell cases from the scene.
In some cases, the thieves bought luggage matching the cases used by jewelry salesmen to carry their wares, prosecutors say.
Matching the cases to the control group was not always straightforward.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com