Table 1. Baseline Characteristics of Study Population.
| DSM-RFA (n = 41†) | SSM-RFA (n = 39†) | P* | |
|---|---|---|---|
| Active tip, % | 0.662 | ||
| 2 cm | 51.2 (21/41) | 46.2 (18/39) | |
| 2.5 cm | 48.8 (20/41) | 53.8 (21/39) | |
| Age (years), mean ± SD | 64.8 ± 7.9 | 62.5 ± 9.4 | 0.239 |
| Male, % | 63.4 (26/41) | 66.7 (26/39) | 0.817 |
| Single HCC, % | 87.8 (36/41) | 84.6 (33/39) | 0.753 |
| Size‡ (cm), mean ± SD | 1.9 ± 0.6 | 1.8 ± 0.6 | 0.492 |
| Subcapsular location‡, % | 37.5 (18/48) | 26.1 (12/46) | 0.273 |
| AFP (ng/mL), mean ± SD | 60.1 ± 192.4 | 54.2 ± 200.6 | 0.894 |
| Child-Pugh class, % | 0.111 | ||
| A | 100.0 (41/41) | 92.3 (36/39) | |
| B | 0.0 (0/41) | 7.7 (3/39) | |
| Albumin (g/dL), mean ± SD | 3.9 ± 0.5 | 3.9 ± 0.5 | 0.951 |
| Bilirubin (mg/dL), mean ± SD | 0.8 ± 0.5 | 0.8 ± 0.5 | 0.697 |
| PT INR, mean ± SD | 1.1 ± 0.1 | 1.1 ± 0.1 | 0.251 |
| Platelet (× 1000/mm3), mean ± SD | 125.8 ± 45.4 | 134.9 ± 52.4 | 0.405 |
*Categorical variables were compared by using Fisher's exact test or chi-squared test, and continuous variables were compared by using independent t test, †Number of patients, ‡Tumor size and frequency of subcapsular tumor were measured on per-nodule basis. AFP = alpha-fetoprotein, DSM = dual-switching monopolar, HCC = hepatocellular carcinoma, RFA = radiofrequency ablation, SD = standard deviation, SSM = single-switching monopolar, PT INR = prothrombin time international normalized ratio