Table 1

Test characteristics

Test characteristicsTest type
Gold standard (%)Low sensitivity (%)Low specificity (%)
Prevalence666
Sensitivity1005083.33
Specificity95.7493.6271.28
False-positive rate4.266.3828.72
PPV6033.3315.63
NPV10096.7098.53
  • The prevalence of disease and all test characteristics are presented as percentages¬†(ie, normalised by a base-rate frequency of 100) reflecting what was presented in the numerical format. The joint event combinations (has vs does not have disease and positive vs negative test result) underlying the percentages were presented in the experience format.

  • NPV, negative predictive value; PPV, positive predictive value.