Effectiveness of impedance monitoring during radiofrequency ablation for predicting popping

Table 2 Tumor characteristics for each impedance type (148 nodules)

Impedance subtype	Maximum tumor diameter (mm)1	ICGR 15 (%)1	Tumor location(segments 1,2,3,4,5,6,7,8)2
A	20.3± 6.0	17.8 ± 13.9	(0,1,0,0,0,0,0,1)
B	20.4 ± 5.3	29.8 ± 10.7a	(1,1,1,1,1,2,1,1)
C	21.2 ± 8.1	19.9 ± 11.1	(0,3,3,3,5,3,3,6)
D	22.7 ± 6.7	24.2 ± 17.9	(0,2,8,4,8,6,4,11)
E	22.7 ± 6.3	21.4 ± 10.2	(1,2,1,2,1,3,8,5)
F	22.3 ± 7.8	24.1 ± 15.9	(1,1,4,1,3,5,3,3)
G	20.9 ± 8.1	20.2 ± 14.0	(0,1,5,2,2,4,4,6)

^aP = 0.028 vs type C (P = 0.028).

¹Data are means ± SD;

²Data are numbers of nodules. ICGR 15: Indocyanine green retention rate at 15 min.