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Table 6 Predictive values for hypertension and diabetes for different prevalences (sensitivity analysis).

From: Validation of diabetes mellitus and hypertension diagnosis in computerized medical records in primary health care

Prevalence Diabetes Hypertension
  PPV (CI 95%) NPV (CI 95%) PPV (CI 95%) NPV (CI 95%)
4% 89.05 (67.11 - 97.01) 99.98 (99.92 - 100) 53.76 (36.99 - 69.72) 99.37 (99.22 - 99.49)
4.5% 90.19 (69.76 - 97.34) 99.98 (99.91 - 99.99) 56.80 (39.91 - 72.26) 99.29 (99.12 - 99.42)
5% 91.13 (72.04 - 97.61) 99.98 (99.90 - 99.99) 59.50 (42.59 - 74.42) 99.20 (99.02 - 99.36)
5.5% 91.91 (74.02 - 97.84) 99.97 (99.89 - 99.99) 61.89 (45.06 - 76.29) 99.12 (98.91 - 99.29)
6% 92.57 (75.76 - 98.02) 99.97 (99.88 - 99.99) 64.05 (47.36 - 77.91) 99.04 (98.81 - 99.22)
6.5% 93.13 (77.29 - 98.18) 99.97 (99.87 - 99.99) 65.99 (49.49 - 79.35) 98.95 (98.70 - 99.15)
7% 93.62 (78.66 - 98.32) 99.96 (99.86 - 99.99) 67.75 (51.47 - 80.62) 98.87 (98.60 - 99.08)
7.5% 94.05 (79.88 - 98.44) 99.96 (99.85 - 99.99) 69.35 (53.33 - 81.76) 98.78 (98.49 - 99.01)
8% 94.43 (80.98 - 98.54) 99.96 (99.84 - 99.99) 70.82 (55.07 - 82.78) 98.69 (98.38 - 98.94)
8.5% 94.77 (81.98 - 98.63) 99.96 (99.82 - 99.99) 72.17 (56.69 - 83.70) 98.60 (98.28 - 98.87)
9% 95.07 (82.88 - 98.72) 99.95 (99.81 - 99.99) 73.41 (58.22 - 84.54) 98.51 (98.17 - 98.80)
9.5% 95.34 (83.71 - 98.79) 99.95 (99.80 - 99.99) 74.55 (59.67 - 85.30) 98.42 (98.06 - 98.72)
10% 95.59 (84.47 - 98.86) 99.95 (99.79 - 99.99) 75.62 (61.03 - 86.00) 98.33 (97.94 - 98.65)
11% 96.02 (85.82 - 98.97) 99.94 (99.77 - 99.99) 77.53 (63.53 - 87.23) 98.15 (97.72 - 98.50)
12% 96.38 (86.97 - 99.07) 99.94 (99.74 - 99.98) 79.19 (65.77 - 88.29) 97.96 (97.49 - 98.35)
13% 96.68 (87.98 - 99.15) 99.93 (99.72 - 99.98) 80.66 (67.80 - 89.20) 97.77 (97.25 - 98.19)
14% 96.95 (88.85 - 99.22) 99.92 (99.69 - 99.98) 81.96 (69.64 - 90.00) 97.58 (97.02 - 98.04)
15% 97.18 (89.63 - 99.28) 99.92 (99.67 - 99.98) 83.12 (71.32 - 90.70) 97.38 (96.77 - 97.87)
20% 97.99 (92.45 - 99.49) 99.88 (99.53 - 99.97) 87.46 (77.89 - 93.25) 96.33 (95.49 - 97.02)
25% 98.49 (94.23 - 99.62) 99.84 (99.37 - 99.96) 90.29 (82.45 - 94.85) 95.16 (94.08 - 96.06)
30% 98.82 (95.45 - 99.70) 99.80 (99.20 - 99.95) 92.28 (85.80 - 95.95) 93.87 (92.51 - 94.99)
35% 99.06 (96.35 - 99.76) 99.75 (98.99 - 99.94) 93.76 (88.36 - 96.75) 92.41 (90.77 - 93.78)
40% 99.24 (97.03 - 99.81) 99.68 (98.75 - 99.92) 94.90 (90.38 - 97.36) 90.77 (88.81 - 92.42)
45% 99.38 (97.56 - 99.84) 99.61 (98.47 - 99.90) 95.80 (92.02 - 97.84) 88.91 (86.61 - 90.85)
50% 99.49 (98.00 - 99.87) 99.53 (98.14 - 99.88) 96.54 (93.37 - 98.22) 86.77 (84.11 - 89.04)
  1. PPV: positive predictive value; NPV: negative predictive value; CI 95%: confidence interval at 95%.