Differences in estimated glomerular filtration rate are associated with different patterns of 24-h ambulatory blood pressure in the general population

Feb 1, 2022Journal of hypertension

Kidney function levels are linked to different 24-hour blood pressure patterns in the general population

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Abstract

The study involved 1733 participants with an eGFR greater than 60 ml/min per 1.73 m2.

The proportion of dippers decreased while the proportions of reverse and nondippers increased across lower eGFR quartiles (P < 0.001).
Lower eGFR groups (Q1 and Q2) were associated with higher odds ratios for nondipper and reverse-dipper blood pressure patterns.
After adjustments, the lowest eGFR group showed significant associations with reverse-dipper and combined nondipper plus reverse-dipper patterns compared to the highest eGFR group.
A significant linear trend indicated that a decrease in eGFR is associated with an increased likelihood of having a nondipper plus reverse-dipper blood pressure pattern (P = 0.023).
Differences in eGFR are linked to distinct 24-hour ambulatory blood pressure monitoring patterns in individuals without chronic kidney disease.

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BACKGROUND: Alterations of the circadian blood pressure rhythm are associated with cardiovascular and chronic kidney diseases. We investigated the relationship between 24-h ambulatory blood pressure monitoring (ABPM) patterns and eGFR differences in participants without chronic kidney disease.

METHOD: This cross-sectional study was conducted using data from the ongoing Korean Genome and Epidemiology Study, which involves 1733 participants (age, 60 ± 7 years; 938 women) with an eGFR >60 ml/min per 1.73 m2. The blood pressure dipping status was stratified as reverse-dipper (<0%), nondipper (0 to <10%), and dipper (≥10%). They were also categorized into eGFR quartiles (Q4, 128.6-101.6; Q3, 101.5-95.7; Q2, 95.6-87.4; and Q1, 87.3-60.5), and Q4 was fixed as the reference.

RESULTS: The proportion of dippers progressively decreased and the proportions of reverse and nondippers significantly increased from the highest to the lowest eGFR quartile (P < 0.001). In the univariate analyses, the Q1 and Q2 groups were significantly associated with increasing odds ratios (ORs) for the nondipper, reverse-dipper, and nondipper plus reverse-dipper groups. After adjustment, the lowest eGFR group was significantly associated with the reverse-dipper and nondipper plus reverse-dipper patterns in comparison with the highest eGFR group [OR = 1.685, 95% confidence interval (CI), 1.002-2.834; OR = 1.422, 95% CI, 1.023-1.978, respectively). The significant linear trend for an association of the nondipper plus reverse-dipper pattern with a decrease in eGFR was confirmed with the test for trend (P = 0.023).

CONCLUSION: Differences in eGFR are associated with different 24-h ABPM patterns in non-CKD individuals. ABPM can identify individuals with a nondipper status in this population.

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Differences in estimated glomerular filtration rate are associated with different patterns of 24-h ambulatory blood pressure in the general population

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