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Table 4 Sensivity, specificity and agreement for diabetes mellitus and hypertension.

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

  TN FN FP TP Inter-observers agreement kappa (CI 95%) Sensitivity % (CI 95%) χ2 p-value Specificity % (CI 95%) χ2 p-value Diagnostic agreement kappa (CI 95%)
Diabetes 390 2 2 421 0.988 (0.977 - 0.998) 99.53 (98.29 - 99.87)   99.49 (98.16 - 99.86)   0.990 (0.981 - 1)
- Male 188 1 1 207 0.985 (0.968 - 1) 99.52 (97.33 - 99.92) 1* 99.52 (97.34 - 99.92) 1* 0.990 (0.976 - 1)
- Female 202 1 1 214 0.990 (0.977 - 1) 99.54 (97.41 - 99.92)   99.53 (97.40 - 99.92)   0.990 (0.977 - 1)
- Age < 70 198 1 1 207 0.980 (0.961 - 1) 99.52 (97.33 - 99.92) 1* 99.50 (97.21 - 99.91) 1* 0.990 (0.977 - 1)
- Age ≥ 70 192 1 1 214 0.995 (0.985 - 1) 99.54 (97.41 - 99.92)   99.48 (97.12 - 99.91)   0.990 (0.977 - 1)
Hypertension 254 72 8 415 0.941 (0.916 - 0.967) 85.22 (81.79 - 88.09)   96.95 (94.09 - 98.45)   0.778 (0.732 - 0.823)
- Male 32 32 3 172 0.937 (0.897 - 0.978) 96.95 (94.09 - 98.45) 0.634 97.30 (92.35 - 99.08) 1* 0.770 (0.700 - 0.841)
- Female 40 40 5 243 0.944 (0.911 - 0.977) 85.87 (81.33 - 89.45)   96.69 (92.48 - 98.58)   0.783 (0.724 - 0.842)
- Age < 70 119 18 5 173 0.96 (0.928 - 0.992) 90.58 (85.6 - 93.96) 0.007 95.97 (90.91 - 98.27) 0.482* 0.850 (0.791 - 0.909)
- Age ≥ 70 135 54 3 242 0.926 (0.888 - 0.964) 81.76 (76.96 - 85.74)   97.83 (93.80 - 99.26)   0.724 (0.660 - 0.789)
- Without DM 232 46 7 312 0.947 (0.921 - 0.974) 87.15 (83.29 - 90.23) 0.045 97.07 (94.08 - 98.57) 0.526* 0.947 (0.921 - 0.974)
- With DM 22 26 1 103 0.882 (0.781 - 0.983) 79.85 (72.11 - 85.86)   95.65 (79.01 - 99.23)   0.522 (0.376 - 0.668)
  1. * Fisher's exact bilateral test; TP: true positive; FP: false positive; TN: true negative; FN: false negative; CI 95%: confidence interval at 95%; DM: diabetes mellitus.