Relationship between nocturnal blood pressure and 24-h urinary sodium excretion in a rural population in Korea

Clinical Hypertension

Table 3 Comparison of BP levels among the quartile groups by sodium intake measured by 24-h urine sample in general linear models

Variable	Sodium excretion quartiles				pfor analysis of variance	pfor trend
Variable	Q1 (<2.65 g)	Q2 (2.65–3.8 g)	Q3 (3.8–5.25 g)	Q4 (>5.25 g)	pfor analysis of variance	pfor trend
Unadjusted
Casual SBP	119.7 ± 2.7	125.1 ± 2.7	120.4 ± 2.7	126.1 ± 2.7	0.22	0.22
Casual DBP	72.0 ± 1.9	75.4 ± 1.9	71.3 ± 1.9	76.7 ± 1.9	0.13	0.23
Daytime SBP	127.2 ± 2.2	131.3 ± 2.2	132.9 ± 2.2	133.6 ± 2.2	0.17	0.038
Daytime DBP	78.1 ± 1.4	83.3 ± 1.4	84.2 ± 1.4	83.1 ± 1.4	0.011	0.0127
Nighttime SBP	102.9 ± 2.6	113.8 ± 2.6	109.4 ± 2.6	115.8 ± 2.6	0.0034	0.0039
Nighttime DBP	64.2 ± 1.7	71.4 ± 1.7	68.7 ± 1.7	72.8 ± 1.7	0.003	0.0023
Adjusted for age and sex
Casual SBP	122.6 ± 2.7	126.7 ± 2.6	119.3 ± 2.6	125.4 ± 2.6	0.19	0.95
Casual DBP	73.8 ± 2.0	76.6 ± 1.9	70.6 ± 1.8	76.3 ± 1.9	0.09	0.85
Daytime SBP	127.0 ± 2.3	131.1 ± 2.3	133.0 ± 2.2	133.6 ± 2.2	0.19	0.0413
Daytime DBP	78.2 ± 1.5	83.3 ± 1.4	84.2 ± 1.4	83.1 ± 1.4	0.018	0.019
Nighttime SBP	104.4 ± 2.7	114.6 ± 2.6	108.8 ± 2.6	115.5 ± 2.6	0.01	0.0275
Nighttime DBP	65.9 ± 1.7	72.0 ± 1.7	68.1 ± 1.7	72.4 ± 1.6	0.0148	0.0455
Adjusted for age, sex, and MetS
Casual SBP	124.5 ± 2.7	127.8 ± 2.6	120.8 ± 2.6	125.2 ± 2.5	0.29	0.68
Casual DBP	75.1 ± 2.0	77.4 ± 1.9	71.9 ± 1.9	76.1 ± 1.8	0.18	0.78
Daytime SBP	127.9 ± 2.4	131.6 ± 2.2	133.6 ± 2.3	133.5 ± 2.2	0.28	0.075
Daytime DBP	79.0 ± 1.5	83.7 ± 1.4	84.8 ± 1.4	83.0 ± 1.4	0.034	0.055
Nighttime SBP	105.7 ± 2.8	115.4 ± 2.6	110.2 ± 2.7	115.2 ± 2.6	0.03	0.065
Nighttime DBP	66.6 ± 1.8	72.5 ± 1.7	68.8 ± 1.7	72.3 ± 1.7	0.036	0.089

BP blood pressure, SBP systolic blood pressure, DBP diastolic blood pressure, MetS score the summed number of abnormal criteria for metabolic syndrome except for BP.

ISSN: 2056-5909