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Table 4 Example of Language Variation between Two Data Sources

From: Assessment of the impact of EHR heterogeneity for clinical research through a case study of silent brain infarction

Mayo – Non-SBI

TMC – Non-SBI

 • No restricted diffusion.

 • No focal masses, focal atrophy, or foci of restricted water diffusion.

 • No evidence for acute ischemia on the diffusion weighted images.

• There is no acute territorial infarct.

• No acute territorial infarct.

• There is no decreased diffusion to indicate an acute infarct.

Mayo – WMD

TMC – WMD

 • Mild leukoaraiosis

 • Minimal leukoaraiosis

 • Moderate leukoaraiosis

• There are scattered foci of hypodensity in the subcortical and periventricular white matter, a non-specific finding but likely reflecting the sequela of chronic microangiopathy

• Areas of white matter hypodensity are a non-specific finding but may represent the sequela of chronic microangiopathy

• There are multiple foci of t2 flair hyperintensity in the periventricular, deep and subcortical white matter, a non-specific finding but likely reflecting the sequela of chronic microangiopathy