Table 2.

Accuracy (with 95% confidence intervals) of the New Zealand chart, Sheffield table, and Joint British Societies chart for predicting cardiovascular disease risk ≥ 20% over 10 years in 202 patients with uncomplicated mild hypertension

	New Zealand chart	Sheffield table	Joint Societies chart
Sensitivity (%)	75 (64 to 86)	81 (71 to 91)	63 (51 to 75)
Specificity (%)	96 (92 to 99)	96 (92 to 99)	98 (95 to 100)
PPV (%)	88 (79 to 97)	89 (81 to 97)	93 (85 to 100)
NPV (%)	90 (85 to 95)	92 (87 to 96)	86 (80 to 91)

NPV, negative predictive value; PPV, positive predictive value.