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Table 4 The sensitivity, specificity, and positive and negative predictive values of the classification by the tool and the gold standard

From: Patients’ self-triage for unscheduled urgent care: a preliminary study on the accuracy and factors affecting the performance of a Belgian self-triage platform

 

Level of care ( N  = 750)

Level of urgency ( n  = 642)

Criteria

Emergency vs. Primary care

Emergency care (1 vs. 2)

( n  = 432) a

Primary care (1 vs. 2)

( n  = 210) a

Sensitivity

0.97 (0.95—0.98)

0.83 (0.78—0.87)

0.91 (0.85—0.95)

Specificity

0.69 (0.64—0.74)

0.72 (0.65—0.79)

0.65 (0.53—0.76)

Positive predictive value

0.82 (0.79—0.85)

0.81 (0.76—0.86)

0.83 (0.77—0.89)

Negative predictive value

0.94 (0.90—0.97)

0.74 (0.67—0.81)

0.80 (0.67—0.89)

% Agreement

85.6%

78.7%

82.4%

Fleiss’ kappa

0.687 (0.604—0.770)

0.552 (0.446 – 0.659)

0.583 (0.399 – 0.768)

  1. a Sample size was adjusted after removing falsely classified cases by the participants