Table 1.

Accuracy of a dipstick result ≥1+ to identify patients with ≥300 mg/g albuminuria

≥300 mg/g Albuminuria Present by ACRa<300 mg/g Albuminuria Present by ACRbTotal
Urine dipstick test-positivec90 (true positives)798 (false positives)888
Urine dipstick test-negatived1 (false negative)9947 (true negatives)9948
Total9110,745
  • ACR, albumin to creatinine ratio. Modified from ref. 1, with permission.

  • a Sensitivity = (number of true positives)/(number of true positives + number of false negatives)=99%.

  • b Specificity = (number of true negatives)/(number of true negatives + number of false positives)=93%.

  • c Positive predictive value = (number of true positives)/(number of true positives + number of false positives)=10%.

  • d Negative predictive value = (number of true negatives)/(number of true negatives + number of false negatives)=100%.