Table 5 Sensitivity and specificity of prediction equations vs observed 24-hour urinary salt

From: Prediction of 24-hour sodium excretion from spot urine samples in South African adults: a comparison of four equations

Equations

Predicted salt intake equivalent category

Measured (observed) salt intake equivalent category

Specificity%

Sensitivity%

Less than 5 g/day, N = 140

 ≥ 5 g/day, N = 298

INTERSALT

 < 5 g/day, n = 432

140

292

100

2.0

 ≥ 5 g/day, n = 6

0

6

  

Tanaka

 < 5 g/day, n = 30

17

13

12.1

95.6

 ≥ 5 g/day, n = 408

123

285

  

Kawasaki

 < 5 g/day, n = 12

7

5

5.0

98.3

 ≥ 5 g/day, n = 426

133

293

  

Mage

 < 5 g/day, n = 19

12

7

8.6

97.7

 ≥ 5 g/day, n = 419

128

291

  
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