Accordingly, the sensitivity of a pain
screening NRS score of 1 was 71% (95% CI 62–79), and the
specificity was 81% (95% CI 74–86). A pain screening NRS
score of 4 had a sensitivity of 63% (95% CI 54–72) and
specificity of 85% (95% CI 79–90). Likelihood ratios were
similar to those obtained using the first reference standard
(Table 2).