Not valuable at all. Using the age- and sex-specific upper limits of normal that were previously described,
a prolonged CRT does not accurately predict 450 mL of blood loss (6% sensitivity, 93% specificity, positive
likelihood ratio [LR], 1.0). Diagnostic performance is not improved by using an arbitrary upper limit of 2
seconds (11% sensitivity, 89% specificity, positive LR,1.0). Hence, although the test has good interobserver
agreement, its clinical value in adults is limited.
a prolonged CRT does not accurately predict 450 mL of blood loss (6% sensitivity, 93% specificity, positive
likelihood ratio [LR], 1.0). Diagnostic performance is not improved by using an arbitrary upper limit of 2
seconds (11% sensitivity, 89% specificity, positive LR,1.0). Hence, although the test has good interobserver
agreement, its clinical value in adults is limited.