Table 10.

—Relationship Between Adjusted Diagnostic Yield, Hospital Volume, and Use of Deep or General Anesthesia

Hospital	Annual TBNA Volume, Cases/y	Percentage of TBNA Cases Using Deep or General Anesthesia	Percentage of TBNA Cases Using On-site Cytologic Evaluation	Risk-Adjusted Diagnostic Yielda (95% CI)
F	435	99	100	0.58 (0.50-0.67)
D	276	91	93	0.53 (0.43-0.64)
E	325	1	2	0.48 (0.36-0.64)
C	169	39	9	0.44 (0.33-0.59)
B	166	8	89	0.35 (0.24-0.49)
A	97	8	92	0.38 (0.25-0.56)

See Table 1 and 9 legends for expansion of abbreviations.

^aRisk-adjusted diagnostic yield was based on indirect standardization using LN size.