Key result
Every 1-unit increase in the DASH score was associated with a 0.18-unit decrease in nighttime variance independent of the mean for systolic blood pressure (95% CI: -0.34 to -0.01).
Why the study?
It was unknown whether the DASH dietary pattern is associated with other blood pressure variables beyond mean SBP and DBP, such as daytime and nighttime mean BP and BP variance independent of the mean.
Does a higher DASH diet score reduce daytime and nighttime mean blood pressure and blood pressure variability in elderly Chinese adults not on antihypertensive medications?
Cross-Sectional (n=324)
Does a higher DASH diet score reduce daytime and nighttime mean blood pressure and blood pressure variability in elderly Chinese adults not on antihypertensive medications?
Mean Difference: -0.18 (95% CI -0.34–-0.01)
The DASH dietary pattern is associated with lower nighttime blood pressure variability in elderly adults not on antihypertensive medications, independent of sleep parameters.
BACKGROUND: It is unknown whether the Dietary Approaches to Stop Hypertension (DASH) dietary pattern is associated with other blood pressure (BP) variables, beyond mean systolic blood pressure (SBP) and diastolic blood pressure (DBP). OBJECTIVES: The study aimed to study the associations between the DASH dietary pattern and daytime and nighttime mean BPs and BP variance independent of the mean (VIM). METHODS: A sample of 324 Chinese adults aged ≥ 60 y who were not on BP-lowering medications were included in the analysis. The DASH score was calculated using data collected by a validated FFQ. The 24-h ambulatory BP was measured and the mean and VIM SBP and DBP were calculated for both the daytime (06:00-21:59) and nighttime periods (22:00-05:59). Multivariable linear models were constructed to assess associations between the DASH dietary pattern and daytime and nighttime BP outcomes, adjusting for sociodemographic factors, lifestyle, BMI, and hypertension (clinic SBP ≥ 140 mm Hg or DBP ≥ 90 mm Hg), and sleep parameters (only for nighttime BP outcomes). An interaction term between DASH score and hypertension status was added to explore the potential differential association in normotensive and hypertensive individuals. RESULTS: Every 1-unit increase in the DASH score was associated with a 0.18-unit (95% CI: -0.34, -0.01 unit) and a 0.22-unit (95% CI: -0.36, -0.09 unit) decrease in nighttime VIM SBP and nighttime VIM DBP, respectively. DASH score was not associated with any daytime BP outcomes, nighttime mean SBP, or nighttime mean DBP. A significant interaction (DASH score × hypertension status) was detected for VIM SBP (P-interaction = 0.04), indicating a differential association between DASH score and nighttime VIM SBP by hypertension status. CONCLUSIONS: Independently of sleep parameters and other factors, the DASH dietary pattern is associated with lower nighttime BP variability in elderly adults.
No takes yet. Share an insight, caveat, or question.
Na et al. (2022) conducted a cross-sectional in Hypertension (n=324). DASH dietary pattern vs. Lower DASH score was evaluated on Nighttime variance independent of the mean (VIM) systolic blood pressure (MD -0.18, 95% CI -0.34 to -0.01). Every 1-unit increase in the DASH score was associated with a 0.18-unit decrease in nighttime variance independent of the mean for systolic blood pressure (95% CI: -0.34 to -0.01).
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: