As presented in Table 5, with the cut-off value of the score less than or equal to3, the sensitivity was 0.97 (95% CI 0.85, 0.99) with the corresponding negative likelihood ratio (LR-) of 0.07 and negative predictive value of 0.97. With a cut-off value of the score greater than or equal to8, the specificity was 0.98 (95% CI 0.92, 0.99) with the corresponding positive likelihood ratio (LR+) of 14 and positive predictive value of 0.88. Within the gray zone of the score 4 to 7, the performance of score was poorer with the sensitivity of 0.77 and specificity of 0.43. There were 83 caregivers (79%) who rated the probability that the infant they were investigating had a true LNS.