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Table 3 Validity measures by laboratory serum sodium values

From: Sensitivity of International Classification of Diseases codes for hyponatremia among commercially insured outpatients in the United States

  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