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Visit date:Date:Pt:^Patient:Qn

Known as: Visit date:Date:Point in time:^Patient:Quantitative, Visit date, Visita, data:Data:Pt:^Paziente:Qn 
National Institutes of Health

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American Physical Therapy AssociationPatients

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2007
2007
Comparing Values Across Observations: Be Careful
There are several techniques that can be used to compare values across observations in SAS. It is important to understand how… 
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