Table 4

Characteristics of the questionnaire used to determine the sense of alarm for diagnosis of health threatening pathology in patients with dyspnoea and/or chest pain in general practice

StatisticValue95% CI
Sensitivity0.610.48 to 0.73
Specificity0.710.68 to 0.75
Positive likelihood ratio2.121.49 to 2.82
Negative likelihood ratio0.550.37 to 0.77
Disease prevalence0.200.16 to 0.26
Positive predictive value0.350.25 to 0.46
Negative predictive value0.880.82 to 0.92
Accuracy0.690.64 to 0.74