Comparison of Information Content of Structured and Narrative Text Data Sources on the Example of Medication Intensification

Table 3

Relationship of Anti-Hypertensive Treatment Intensification Documented in Different Sources and Monthly Change in Blood Pressure

Systolic Blood Pressure		Diastolic Blood Pressure
Intensification Information Source	Effect1	p-value	Effect1	p-value
Structured only	−4.7	< 0.0001	−1.5	< 0.0001
Notes only	−8.1	< 0.0001	−2.3	< 0.0001
Both notes and structured2	−5.8	< 0.0001	−3.8	< 0.0001

↵1 Estimate of a monthly change in blood pressure, mm Hg, associated with increase in treatment intensification rate of one intensification/month.
↵2 For intensifications documented both in narrative and structured EMR data.
Effect sizes are the parameter estimates for a mixed linear multiple regression model with the average monthly blood pressure change as the dependent variable and medication intensification rates from all three sources as independent variables.

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