4.

3组结节各观察指标组间统计学比较结果

Statistical results of the indicators in the 3 groups

Group	Positive rate of FNA	Accuracy rate of FNA	Indeterminate rate of FNA	Positive predictive value	Negative predictive value
*P < 0.05.
Comparison between group I and group II	0.107	0.693	0.940	1.000	0.778
Comparison between group I and group III	0.001*	0.858	0.397	0.539	0.414
Comparison between group II and group III	0.000*	0.412	0.439	0.169	0.490