Image-guided microwave ablation of hepatocellular carcinoma (≤5.0 cm): is MR guidance more effective than CT guidance?

Table 1 Patient characteristics

Characteristics	CT-guided (n = 47)	MR-guided (n = 54)	P value
Age (y)†	55.8 ± 8.9	53.2 ± 6.5	0.367^‡
Sex			0.176^*
Male	31	43
Female	16	11
ECOG performance status			0.230^*
0	29	26
1	18	28
Etiology			0.086^§
Hepatitis B	32	44
Hepatitis C	4	6
Alcohol	9	2
Unknown	2	2
Child–Pugh class			0.217^*
A	33	31
B	14	23
Location of tumor			0.245^*
Typical locations	23	33
Hepatic dome	12	7
Close to the heart/diaphragm/hepatic hilum	12	14
a-Fetoprotein level (ng/mL)			0.407^*
< 200	28	37
> 200	19	17
Tumor diameter (cm)			0.163^*
<3	28	24
≥ 3,< 5	19	30
Tumor number			0.686^*
Single (1)	26	33
2–3	21	21
Duration of ablation (min)	11.2 ± 5.4	9.7 ± 3.2	0.003^‡
Generator power (watts)	57.3 ± 8.5	54.5 ± 6.3	0.047^‡

Note.—Unless indicated, data are numbers of patients, and numbers in parentheses are percentages. ECOG Eastern Cooperative Oncology Group. *Pearson χ2 test was used. †Data are mean ± standard deviation. ‡Independent-samples t test was used. §Fisher exact test was used

ISSN: 1471-2407