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Table 1 Overview of the test characteristics of the four selection methods.

From: Defining frequent attendance in general practice

  6 cl. method 3%FA1 6 cl. method 10%FA2 4 cl. method 3%FA3 4 cl. method 10%FA4
  women men women men women men women men
Sensitivity 94,2 89,4 94,0 93.1 89.4 93.6 94.7 91.5
Specificity 99,8 99,8 99,3 99.8 99.8 99.6 99.6 99.1
PPV5 93,7 93,7 94,3 98.2 93.7 89.5 96.3 93.1
NPV6 99,8 99,6 99,2 99.0 99.6 99.8 99.3 98.8
Kappa 0.937 0.912 0.934 0.950 0.912 0.911 0.949 0.912
  3 cl. method 3%FA7 3 cl. method 10%FA8 3 group method 3%FA9 3 group method 10%FA10
  women men women men women men women men
Sensitivity 89.0 84.8 96.0 85.5 76.1 73.6 79.3 86.5
Specificity 99.3 99.3 98.3 98.8 99.1 99.4 98.5 97.6
PPV 88.1 80.4 87.8 90.6 74.1 82.3 86.9 83.1
NPV 99.6 99.5 99.5 98.0 99.2 99.1 97.4 98.1
Kappa 0.881 0.819 0.906 0.864 0.742 0.770 0.809 0.826
  6 cl. method 4 cl. method 3 cl. method 3 group method
  3% FA 10% FA 3% FA 10% FA 3% FA 10% FA 3% FA 10% FA
  Men and women Men and Women Men and women Men and Women
Sensitivity 91.8 93.5 90.9 93.0 86.9 90.6 74.8 83.0
Specificity 99.8 99.5 99.7 99.3 99.4 98.5 99.3 98.0
PPV 93.7 96.3 91.4 94.6 84.1 89.1 78.0 84.8
NPV 99.7 99.1 99.7 99.1 99.5 98.7 99.1 97.7
Kappa 0.925 0.942 0.912 0.930 0.849 0.885 0.756 0.818
  1. 1. 6 cl. method: selection FAs per 10 years of age.
  2. 2. Idem
  3. 3. 4 cl. method: selection of FAs per 15 years of age
  4. 4. Idem
  5. 5. positive predictive value
  6. 6. negative predictive value
  7. 7. 3 cl. method: selection of FAs in 3 age groups (15–44; 45–64; 65–74).
  8. 8. Idem
  9. 9. 3 group method: selection of male FAs in two age groups (15–44; 45–74) and women in one group.
  10. 10. Idem