Results of meta-analytic summary estimates of CT and US for diagnosing cervical lymph node metastasis in patients with papillary thyroid cancer by level-by-level analysis

	Meta-Analysis Summary Estimate
	Sensitivity (95% CI)	P Value	Specificity (95% CI)	P Value
All cervical lymph nodes
US	51% (42–60)		91% (85–95)
CT	62% (52–70)	.127^{^a}	87% (80–92)	.351^{^a}
Combined CT/US	69% (61–77)	.011^{^b}	81% (74–87)	.074^{^b}
Lateral cervical lymph nodes
US	71% (57–82)		85% (64–95)
CT	70% (59–80)	.858^{^a}	89% (81–94)	.792^{^a}
Combined CT/US	90% (80–95)	.029^{^b}	70% (43–88)	.329^{^b}
Central cervical lymph nodes
US	38% (27–52)		91% (81–96)
CT	57% (43–69)	.088^{^a}	85% (72–92)	.368^{^a}
Combined CT/US	57% (45–68)	.079^{^b}	83% (75–89)	.281^{^b}

↵a Comparison for CT vs US.
↵b Comparison for combined CT/US vs US.