Table 3

Validity measures by laboratory serum sodium values


Serum Sodium (mmol/L)



< 136
≤ 133
≤ 130
≤ 125

Sensitivity
3.46
7.50
13.85
29.57
     False-negative rate
96.54
92.50
86.15
70.43
Specificity
99.95
99.94
99.92
99.90
     False-positive rate
0.05
0.06
0.08
0.10
Positive predictive value
62.64
48.74
30.00
10.42
Negative predictive value
97.93
99.28
99.78
99.97

Shea et al. BMC Nephrology 2008 9:5   doi:10.1186/1471-2369-9-5