Does casual urine Na/K ratio predict 24 h urine Na/K ratio in treated hypertensive patients? Comparison between casual urine voided in the morning vs. 24 h urine collected on the previous day

Does casual urine Na/K ratio predict 24 h urine Na/K ratio in treated hypertensive patients? Comparison between casual urine voided in the morning vs. 24 h urine collected on the previous day

The urine sodium-to-potassium (Na/K) ratio is associated with blood pressure and cardiovascular diseases. A single urine sample is preferable for determining the Na/K ratio in clinical practice. We evaluated whether the Na/K ratio measured using morning casual urine samples predicts the ratio measur...

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Veröffentlicht in:Hypertension research 2024-10
Hauptverfasser: Arakawa, Kimika, Tominaga, Mitsuhiro, Sakata, Satoko, Tsuchihashi, Takuya
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Tominaga, Mitsuhiro
Sakata, Satoko
Tsuchihashi, Takuya
description The urine sodium-to-potassium (Na/K) ratio is associated with blood pressure and cardiovascular diseases. A single urine sample is preferable for determining the Na/K ratio in clinical practice. We evaluated whether the Na/K ratio measured using morning casual urine samples predicts the ratio measured using the preceding 24 h urine sample in patients with hypertension. The study included 187 hypertensive patients (mean age 66.1 years, 52.4% female) whose Na and K concentrations were measured both in 24 h (24Na/K) and casual urine the next morning (CNa/K). The Na/K ratios were 3.54 ± 1.5 in 24NaK and 2.63 ± 1.9 in CNa/K. The two estimates showed a significant positive correlation (r = 0.49, p 
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Comparison between casual urine voided in the morning vs. 24 h urine collected on the previous day</title><source>Alma/SFX Local Collection</source><creator>Arakawa, Kimika ; Tominaga, Mitsuhiro ; Sakata, Satoko ; Tsuchihashi, Takuya</creator><creatorcontrib>Arakawa, Kimika ; Tominaga, Mitsuhiro ; Sakata, Satoko ; Tsuchihashi, Takuya</creatorcontrib><description>The urine sodium-to-potassium (Na/K) ratio is associated with blood pressure and cardiovascular diseases. A single urine sample is preferable for determining the Na/K ratio in clinical practice. We evaluated whether the Na/K ratio measured using morning casual urine samples predicts the ratio measured using the preceding 24 h urine sample in patients with hypertension. The study included 187 hypertensive patients (mean age 66.1 years, 52.4% female) whose Na and K concentrations were measured both in 24 h (24Na/K) and casual urine the next morning (CNa/K). The Na/K ratios were 3.54 ± 1.5 in 24NaK and 2.63 ± 1.9 in CNa/K. The two estimates showed a significant positive correlation (r = 0.49, p &lt; 0.0001), and (CNa/K-24Na/K)/24Na/K was -23.5 ± 44.4%. In the Bland-Altman plot, the mean difference was -0.91. When CNa/K was divided into three groups, &lt;2 (low), 2-4 (medium), and ≥4 (high), the overall agreement with 24Na/K was 46.0% (86 of 187). The low group had 24.4% agreement and 75.6% underestimation (24Na/K &gt; CNa/K); the medium group had 60.8% agreement, 30.5% underestimation, and 8.7% overestimation (24Na/K &lt; CNa/K); and the high group had 71.8% agreement and 28.2% overestimation. These results indicate that CNa/K and 24Na/K were significantly correlated; however, CNa/K was generally lower than 24Na/K, particularly at Na/K levels &lt; 2. 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Comparison between casual urine voided in the morning vs. 24 h urine collected on the previous day</title><title>Hypertension research</title><addtitle>Hypertens Res</addtitle><description>The urine sodium-to-potassium (Na/K) ratio is associated with blood pressure and cardiovascular diseases. A single urine sample is preferable for determining the Na/K ratio in clinical practice. We evaluated whether the Na/K ratio measured using morning casual urine samples predicts the ratio measured using the preceding 24 h urine sample in patients with hypertension. The study included 187 hypertensive patients (mean age 66.1 years, 52.4% female) whose Na and K concentrations were measured both in 24 h (24Na/K) and casual urine the next morning (CNa/K). The Na/K ratios were 3.54 ± 1.5 in 24NaK and 2.63 ± 1.9 in CNa/K. The two estimates showed a significant positive correlation (r = 0.49, p &lt; 0.0001), and (CNa/K-24Na/K)/24Na/K was -23.5 ± 44.4%. In the Bland-Altman plot, the mean difference was -0.91. When CNa/K was divided into three groups, &lt;2 (low), 2-4 (medium), and ≥4 (high), the overall agreement with 24Na/K was 46.0% (86 of 187). The low group had 24.4% agreement and 75.6% underestimation (24Na/K &gt; CNa/K); the medium group had 60.8% agreement, 30.5% underestimation, and 8.7% overestimation (24Na/K &lt; CNa/K); and the high group had 71.8% agreement and 28.2% overestimation. These results indicate that CNa/K and 24Na/K were significantly correlated; however, CNa/K was generally lower than 24Na/K, particularly at Na/K levels &lt; 2. 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Comparison between casual urine voided in the morning vs. 24 h urine collected on the previous day</atitle><jtitle>Hypertension research</jtitle><addtitle>Hypertens Res</addtitle><date>2024-10-12</date><risdate>2024</risdate><issn>0916-9636</issn><issn>1348-4214</issn><eissn>1348-4214</eissn><abstract>The urine sodium-to-potassium (Na/K) ratio is associated with blood pressure and cardiovascular diseases. A single urine sample is preferable for determining the Na/K ratio in clinical practice. We evaluated whether the Na/K ratio measured using morning casual urine samples predicts the ratio measured using the preceding 24 h urine sample in patients with hypertension. The study included 187 hypertensive patients (mean age 66.1 years, 52.4% female) whose Na and K concentrations were measured both in 24 h (24Na/K) and casual urine the next morning (CNa/K). The Na/K ratios were 3.54 ± 1.5 in 24NaK and 2.63 ± 1.9 in CNa/K. The two estimates showed a significant positive correlation (r = 0.49, p &lt; 0.0001), and (CNa/K-24Na/K)/24Na/K was -23.5 ± 44.4%. In the Bland-Altman plot, the mean difference was -0.91. When CNa/K was divided into three groups, &lt;2 (low), 2-4 (medium), and ≥4 (high), the overall agreement with 24Na/K was 46.0% (86 of 187). The low group had 24.4% agreement and 75.6% underestimation (24Na/K &gt; CNa/K); the medium group had 60.8% agreement, 30.5% underestimation, and 8.7% overestimation (24Na/K &lt; CNa/K); and the high group had 71.8% agreement and 28.2% overestimation. These results indicate that CNa/K and 24Na/K were significantly correlated; however, CNa/K was generally lower than 24Na/K, particularly at Na/K levels &lt; 2. Further efforts should be made to address the validity of using casual urine Na/K ratios in hypertension management practices.</abstract><cop>England</cop><pmid>39394517</pmid><doi>10.1038/s41440-024-01945-8</doi></addata></record>
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title Does casual urine Na/K ratio predict 24 h urine Na/K ratio in treated hypertensive patients? Comparison between casual urine voided in the morning vs. 24 h urine collected on the previous day
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