Value of dietary fiber intake in predicting blood pressure control of patients with essential hypertension

Objective  To investigate the value of dietary fiber intake in predicting blood pressure control in patients with hypertension.

Methods  A prospective observational study design was used to collect patients' 3-day dietary diaries for amount of dietary fiber intake; after tracking for 3 months, 24-hour dynamic blood pressure was recorded and analyzed to obtain the average systolic and diastolic blood pressures. The receiver operating characteristic (ROC) curve was used to evaluate the predictive effect of dietary fiber intake on blood pressure control.

Results  Complete dietary nutrient intake of 166 cases was obtained, of which 148 cases had blood pressure data. Regression analysis showed that dietary fiber intake had a positive effect on systolic blood pressure (OR=0.897, 95%CI, 0.839 to 0.960), and also had a good predictive effect on systolic blood pressure area under the curve (AUC) was 0.715, sensitivity was 60.0%, and specificity was 76.9%. Dietary fiber intake did not have a positive effect on diastolic blood pressure.

Conclusion  Dietary fiber intake has a good predictive effect on the control of systolic blood pressure in hypertension patients, but it fails to effectively predict the control of diastolic blood pressure.