Summary of the meta-analytic pooled proportions for nondiagnostic results, inconclusive results, and malignancy on CNB

	No. of Studies	Total No. of Cases	Summary Estimate			Trim-and-Fill Estimate
	No. of Studies	Total No. of Cases	Pooled Proportion (95% CI)	P Value for Heterogeneity^{^a}	I^2b	No. of Missing Studies	Adjusted Pooled Proportion (95% CI)
Nondiagnostic results	6	1836	1.8% (0.4%–3.2%)	<.01	94.6%	2	0.8% (−0.8%–2.5%)
Inconclusive results	6	1836	25.1% (15.4%–34.9%)	<.01	95.8%	0
Malignancy	6	1836	18.9% (8.4%–29.5%)	<.01	98.3%	1	15.6% (4.4%–26.8%)

↵a P value by the Cochran Q method to test the heterogeneity of the pooled data, with P < .05 indicating substantial heterogeneity.
b Higgins index for heterogeneity (0%–40%, might not be important; 30%–60%, may represent moderate heterogeneity; 50%–90%, may represent substantial heterogeneity; 75%–100%, may represent considerable heterogeneity).