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There were too few controls to get a true one-to-one match on age, sex, diabetes status, and baseline CAC.
The other 93 patients were selected to match on age and gender with those in the osteoporosis group (one-to-one paired).
In column (1) we report the outcome in which we match on age only.
There is, of course, a compelling reason to match on age, since productivity is related to age, and since age is, from the perspective of labor market participant, exogenous.
We listed the variables we wished to match on: age, gender and practice.
They were carefully selected to match on age, IQ, and reading level of those in the Dyslexia group (see Table 1).
Similar(52)
We used the SAS PHREG procedure (SAS Institute Inc. 2006), with age as the time variable (effectively matching on age).
Only one study compared a sample of survivors with healthy controls, matched on age and gravidity (Ruddy et al., 2011).
The boys were all matched on age, IQ, and the presence of oppositional defiant disorder (ODD /conduct disorder (CD).
Controls (HCT survivors without CVD) were matched on age, year of HCT, type of HCT, and duration of follow-up.
Methods: Thirteen neuroleptic-naïve male subjects met full criteria for SPD and were group-matched on age and parental socioeconomic status to 13 comparison subjects.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com