Associations between Blood Pressure Control and Documented Nutrition Care Using Structured Data from Electronic Health Records of Patients with Hypertension

BACKGROUND: Documentation in Electronic Health Records (EHRs) of nutrition care events (overweight or obesity (BMI > 25 or 30, respectively) diagnoses, preventive care visits, or provision of patient education materials (PEM)) for chronic diseases is unclear. METHODS: Cross-sectional analysis using structured EHR data from primary care visits at a health system in the US from January 2018 - December 2020 of adult patients with hypertension (n = 6,419) tested for associations between last visit blood pressure (BP) control (≤ 140 Systolic BP and ≤ 90 Diastolic BP) and aggregate nutrition care events. Descriptive statistics and multiple logistic regression models were constructed to examine the predictive power of nutrition care events for blood pressure control. RESULTS: The median age was 62 years, 32% were male, 48% were Black, 26% were from rural areas and 35.9% had controlled BP at last visit. For the 62% of patients with documented nutrition care, 14.6% had an overweight/obesity diagnosis, 26.2% had a preventive care visit, and 42% received PEM with dietary and hypertension content. The models showed patients who had more preventive care visits (aOR 1.12; CL 1.06, 1.18) had higher odds for BP control. Whereas Black patients compared with white patients (aOR 0.84; CL 0.74, 0.95), those with more hypertension medications (aOR 0.97; CL 0.96, 0.99) and more primary care visits over the study period (aOR 0.98; CL 0.97, 0.99) had lower odds for BP control. CONCLUSIONS: In this study, documented nutrition care in preventive care visits is significantly associated with BP control, but documentation is infrequent. Additional research should include examining clinical notes for evidence of nutrition care, which may uncover areas that show promise for improving nutrition care for patients with chronic disease.