Table 2.

Accuracy of a dipstick result ≥1+ to identify patients with ≥30 mg/g albuminuria

≥30 mg/g Albuminuria Present by ACRa<30 mg/g Albuminuria Present by ACRbTotal
Urine dipstick test-positivec419 (true positives)469 (false positives)888
Urine dipstick test-negatived306 (false negatives)9642 (true negatives)9948
Total72510,111
  • 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)=58%.

  • b Specificity = (number of true negatives)/(number of true negatives + number of false positives)=95%.

  • c Positive predictive value = (number of true positives)/(number of true positives + number of false positives)=47%.

  • d Negative predictive value = (number of true negatives)/(number of true negatives + number of false negatives)=97%.