TABLE 3.
Comparison between the estimated 24‐hour urinary sodium excretion rate by the four spot sodium methods and the measured 24‐hour urinary sodium excretion (mmol/day)
| Categories | Measured 24‐hour USE | Estimated 24‐hour USE by Kawasaki | Estimated 24‐hour USE by Tanaka | Estimated 24‐hour USE by INTERSALT |
|---|---|---|---|---|
| All participants | 198.8±38.7 | 204.2±47.5# | 158.0±29.6* | 141.7±33.3* |
| Male (N = 126) | 201.6±48.4 | 217.9±49.4* | 158.2±29.9* | 170.0±26.3* |
| Female (N = 197) | 197.0±31.5 | 195.0±44.2 | 157.9±29.4* | 123.8±23.4* |
| Mean difference | Ref. | 5.4 | −40.8 | −57.1 |
| 95% CI mean difference | Ref. | (0.8, 10.1) | (−44.6, −36.9) | (−61.9, −52.4) |
Estimated 24‐hour urinary sodium excretion rate by Kawasaki, Tanaka, INTERSALT, SH2 method were compared with measured 24‐hour urinary sodium excretion.
Abbreviations: INTERSALT, International Cooperative Study on Salt, Other Factors, and Blood Pressure; USE, urinary sodium excretion.
The estimated values compared with measured values, P < .05 was statistically significant; * P < .001;# P < .05.