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Table 3 Main demographic characteristics of the population of patients over 18 years old attended in Health Area 4 and of samples.

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

  N (%) Age (years) median (IQR) Age ≥ 70 years (%) Gender female (%) DM (%)
Patients with diagnosis code of diabetes (T-90) 32,377 (5.02) 71.15 (60.03-78.95) 52.37 50.83  
Sample of patients with diagnosis code of diabetes (sample 1) 423 (1.31) 70.31 (60.22-78.20) 50.83 50.83  
   - Correct diagnosis (TP) 421 (99.53) 70.31 (60.25-78.43) 50.83 50.83  
   - Incorrect diagnosis (FP) 2 (0.47) 64.33 (51.22-77.44) 50 50  
Patients without diagnosis code of diabetes (T-90) 612,896 (94.98) 43.63 (33.27-60.08) 14.85 56.34  
Sample of patients without diagnosis code of diabetes (sample 2) 392 (0.06) 69.66 (59.57-78.05) 49.2 51.8  
   - Correct diagnosis (TN) 390 (99.49) 69.66 (59.52-78.03) 49.2 51.8  
   - Incorrect diagnosis (FN) 2 (0.51) 74.23 (62.79-85.67) 50 50  
Patients with diagnosis code of hypertension (K-86 ó K-87) 91,065 (14.11) 71.96 (61.66-79.41) 54.53 58.58 21.55
Sample of patients with diagnosis code of hypertension (sample 3) 423 (0.46) 72.63 (61.56-79.40) 57.92 58.63 24.59
   - Correct diagnosis (TP) 415 (98.11) 72.67 (61.65-79.40) 58.31 58.55 24.82
   - Incorrect diagnosis (FP) 8 (1.89) 64.00 (55.18- 76.86) 37.5 62.5 12.5
Patients without diagnosis code of hypertension (K-86 or K-87) 554,208 (85.89) 41.47 (32.21-54.68) 10.52 55.65 2.3
Sample of patients diagnosis code of hypertension (sample 4) 326 (0.06) 70.35 (61.77-79.27) 57.98 57.06 14.72
   - Correct diagnosis (TN) 254 (77.91) 71.68 (61.15-78.26) 53.15 57.48 8.66
   - Incorrect diagnosis (FN) 72 (22.09) 77.74 (69.32-83.99) 75 55.56 36.11
  1. IQ: interquartile range; TP: true positive; FP: false positive; TN: true negative; FN: false negative; DM: diabetes mellitus.