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. Author manuscript; available in PMC: 2018 Nov 21.
Published in final edited form as: AJR Am J Roentgenol. 2010 Aug;195(2):424–428. doi: 10.2214/AJR.09.3803

TABLE 4:

Double-Questionnaire Approach: Ability to Detect Patients With an Estimated Glomerular Filtration Rate (eGFR) < 30 mL/min/1.73 m2

Parameter No./Total Value
Percentage 95% CI (%)
Sensitivity 7/7 100 59.0–100
Specificity 287/658  43.6 39.8–47.5
PPV 7/378   1.9
NPV 287/287 100

Note—All “No” predicts eGFR ≥ 30 mL/min/1.73 m2, and any “Yes” predicts eGFR < 30 mL/min/1.73 m2. PPV = positive predictive value, NPV = negative predictive value.