Table 2.
Relationship Between Changes in the 24‐Hour Urinary Na+/K+ Ratio and Blood Pressure Within 3 y
| Decrease of Na+/K+ Ratio (mmol/mmol) | Systolic BP (mm Hg) | Diastolic BP (mm Hg) | ||||
|---|---|---|---|---|---|---|
| At. Baseline | After 3 y | Increase | At. Baseline | After 3 y | Increase | |
| First quartile (73 people) | 120.7 (15.5) | 131.6 (18.7) | 10.9 (8.9–12.9) | 77.4 (9.8) | 81.2 (11.9) | 3.8 (2.4–5.2) |
| Second quartile (99 people) | 125.1 (19.3) | 134.4 (20.2) | 9.2 (6.9–11.5) | 80.2 (10.3) | 83.1 (11.9) | 2.9 (1.7–4.2) |
| Third quartile (82 people) | 122.8 (22.1) | 129.1 (19.7) | 6.3 (4.0–8.6) | 78.5 (11.3) | 80.1 (9.9) | 1.6 (0.4–2.8) |
| Fourth quartile (85 people) | 128.4 (20.6) | 133.7 (20.5) | 5.3 (2.9–7.7) | 83.5 (11.9) | 83.2 (10.0) | −0.3 (−1.4–0.8) |
| P for trenda | … | … | 0.023 | … | … | 0.001 |
| Total (339 people) | 124.5 (16.4) | 132.3 (19.9) | 7.9 (21.1) | 79.9 (11.0) | 82.0 (11.0) | 2.0 (11.5) |
Quartiles 1–4 of Na+/K+ ratio decrease were defined as <0, 0–1.9, 2.0–3.9, and ≥4.0. An increase of BP after 3 years compared with baseline BP was a mean of BP changes within the study duration for each person. Data are means (standard deviations) unless an increase indicated by means with 95% CIs. BP indicates blood pressure.
a
Adjusted for sex, age, education, smoking, alcohol intake, body mass index, and diabetes mellitus at baseline.