Predictive Values of Preoperative Tests for Difficult Laryngoscopy and Intubation in Adult Patients at Tikur Anbessa Specialized Hospital

Table 4

Sensitivity, specificity, positive predictive values, and negative predictive values for airway parameters against difficult intubation among surgical patients in Tikur Anbessa Hospital from February 1 to March 30, 2016.

Parameters	Sn (%)	Sp (%)	PPV (%)	NPV (%)	Area	value	95% CI	Accuracy (%)
IID	66.7	79.1	14.3	97.3	0.271	0.008	0.112–0.430	27.1
MP	41.7	73	7.4	96	0.574	0.391	0.401–0.746	57.4
MMC	58.3	90.9	25	97.6	0.746	0.004	0.574–0.918	74.6
TMD	58.3	82.2	14.6	97.4	0.297	0.018	0.129–0.466	29.7
SMD	8.3	84.8	27.7	94.6	0.534	0.688	0.375–0.694	53.4
CL	83.3	90	30.3	99	0.867	0.000	0.742–0.991	86.7

Sn = sensitivity; Sp = specificity; PPV = positive predictive value; NPV = negative predictive value; CI = confidence interval; .