Question

To ensure longitudinal patient tracking, which specific data transformation step is required to link a patient’s wearable device outcome data with their existing EHR record?

Accepted Answer

The specific data transformation step required to link wearable device data with an electronic health record is identity resolution, often referred to as record linkage or patient matching. This process involves creating a unique common identifier that bridges two distinct datasets. Because wearable devices typically use internal device IDs or user-defined aliases and electronic health records use medical record numbers, these systems cannot communicate directly. Identity resolution uses demographic matching algorithms to compare data fields such as first name, last name, date of birth, and gender across both sources to confirm they belong to the same individual. Once the system establishes with high statistical confidence that both records refer to the same person, it assigns a master patient index identifier to both, creating a unified longitudinal profile. This allows clinical teams to view wearable outcomes, such as heart rate or activity levels, in the context of the patient&#x27;s existing clinical history stored in the health record.

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To ensure longitudinal patient tracking, which specific data transformation step is required to link a patient’s wearable device outcome data with their existing EHR record?