Lamivudine plus adefovir combination therapy for lamivudine resistance in hepatitis-B-related hepatocellular carcinoma patients

Article information

Clin Mol Hepatol. 2013;19(3):273-279
Publication date (electronic) : 2013 September 30
doi :
Digestive Disease Center, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea.
Corresponding author: Jeong Han Kim. Digestive Disease Center, Department of Internal Medicine, Konkuk University Medical Center, Konkuk University School of Medicine, 120-1 Neungdong-ro, Gwangjin-gu, Seoul 143-729, Korea. Tel. +82-2-2030-7764, Fax. +82-2-2030-5029,
Received 2013 May 11; Revised 2013 August 09; Accepted 2013 August 12.



Lamivudine (LAM) plus adefovir (ADV) combination therapy has been accepted as one of the best treatments for LAM-resistant chronic hepatitis B (CHB). The aim of this study was to determine the efficacy of this combination therapy in hepatocellular carcinoma (HCC) patients.


The medical records of CHB patients who developed LAM resistance and were treated with LAM plus ADV combination therapy for more than 6 months were reviewed. Their virological response (VR; undetectable HBV DNA) and biochemical response (BR; alanine aminotransferase normalization) were evaluated, and the findings of HCC and non-HCC patients were compared.


The data from 104 patients (19 with HCC and 85 without HCC) were analyzed. The VR rates did not differ significantly between the HCC and non-HCC groups: 33.3% vs. 55.6% at 12 months (P=0.119), 58.3% vs. 67.2% at 24 months (P=0.742), 50% vs. 69.8% at 36 months (P=0.280), and 66.7% vs. 71.0% at 48 months (P=1.000). The BR rates also did not differ significantly between the groups: 55.6% vs. 84.0% at 12 months (P=0.021), 58.3% vs. 83.8% at 24 months (P=0.057), 70.0% vs. 77.8% at 36 months (P=0.687), and 66.7% vs. 80.6% at 48 months (P=0.591).


The efficacy of LAM plus ADV combination therapy is comparable in HCC and non-HCC patients.


A chronic infection with hepatitis B virus (HBV) results in substantial morbidity and mortality worldwide, claiming up to 1 million deaths annually.1 Chronic hepatitis B (CHB) can be a silent disease for decades, but cirrhosis, liver failure, and hepatocellular carcinoma (HCC) can be the result of untreated infection.2,3 Lamivudine (LAM) is the first nucleoside analog approved for treatment of CHB, and has been applied globally for CHB patients. But LAM is associated with the highly frequent emergence of drug-resistant mutants, the cumulative rate is about 20% per year.4,5 LAM and Adefovir (ADV) combination therapy has been accepted as one of the best treatments for LAM resistant CHB patients. The American Association for the Study of Liver Diseases (AASLD), the European Association for the Study of the Liver (EASL) and the Korean Association for the Study of the Liver (KASL) guidelines recommend combination therapy for treatment of LAM resistant CHB patients.6-8 Lampertico et al reported a virological response of LAM resistance patients to combination therapy as 61% at 12 month, 70% at 24 month, 79% at 36 month and 82% at 48 month.9 Many reports showed that this combination therapy is superior to ADV monotherapy.10-13 Recently, several Korean reports showed that add-on ADV is superior to a switch to entecavir (ETV).14-16 However, these previous studies excluded HCC patients. Therefore, data about the efficacy of this combination therapy for HCC patients is limited. The aim of this study was to investigate the efficacy of combination therapy and the predictive factors for a virological response.



In this study, we retrospectively reviewed the medical records of patients with CHB who developed LAM-resistance and were treated with LAM and ADV combination therapy for more than 6 months. Detection of LAM-resistance was performed by a restriction fragment mass polymorphism (RFMP) method as previously proposed.17 Patients who received other treatments for LAM-resistance before combination therapy were excluded. Patients started combination therapy before March 2010 and a final follow up was completed March 2012. In cases of liver related death or unrelated death, loss to follow up, liver transplantation, diagnosis of HCC, treatment changes to other protocol, patients were censored. Baseline characteristics were compared based on data at the time just before the combination therapy.

The stage of HCC patients were described according to Barcelona Clinic Liver Cancer (BCLC) classification systems18 and modified Union for International Cancer Control (UICC)-adopted from Liver Cancer Study Group of Japan.19

Assessment of response

We assessed the response at 3 months, 6 months, 12 months, 24 months, 36 months and 48 months after the combination therapy according to following definitions:

Virological response (VR): undetectable HBV DNA by real time PCR (Cobas Amplicor Taqman PCR, lower limit of detection <300 copies/mL)

Virological Breakthrough (VBT): increase in HBV DNA by >1 log10 copies/ml above the nadir on treatment 2 occasional examination

Biochemical response (BR): alanine aminotransferase (ALT) normalization (≤40 IU/L)

Statistical analysis

Continuous variables were expressed as median (range) and the categorical variables were expressed as a percentile. Comparisons between groups were performed by Mann-Whitney U-test for continuous variables and Chi-square test or Fisher's exact test for categorical variables. A P-value <0.05 was considered statistically significant. SPSS version 17.0 was used for statistical analysis.


Baseline characteristics

A total of 104 patients were analyzed (Non-HCC 85, HCC 19 patients). Males were 66 (63.5%), and the median age was 48.5 years. The baseline median HBV DNA level was 7.3 log10 copies/mL, and HBeAg was positive in 65 patients (62.5%). The median duration of the LAM treatment and combination treatment was 23.0 months and 35.2 months. The HCC group showed a higher incidence of over 50 age patients (78.9% vs. 34.1%, P<0.001), a higher incidence of cirrhosis (100% vs. 35.3%, P<0.001). In the HCC group, one patient treated with radiofrequency ablation (RFA) and one patient had performed operation. Nine patients were treated with a combination of transarterial chemoembolization (TACE) and RFA or percutaneous ethanol injection (PEI). The other 8 patients were treated with TACE alone (Table 1).

Baseline characteristics of the subjects

Response rates

The median HBV DNA level during treatment was not different between the two groups and the median reduction of the HBV DNA level from baseline were also not different except at 12 months (P=0.042) (Table 2, Fig. 1).

Change in HBV DNA during combination therapy

Figure 1

The efficacy of combination therapy. (A) Median HBV DNA level. (B) Median reduction in HBV DNA. (C) VR rate. (D) BR rate.

VR rates during treatment were not different between groups. The BR rates during treatment were also not different except at 12 months (P=0.021) (Table 3, Fig. 1). VBT was not observed.

The treatment response to combination therapy

Clinical courses of patients

Among HCC patients, 7 patients died and one case was related to HCC progression. Liver related deaths other than HCC were 3 cases (varix bleeding, hepatorenal syndrome, hepatic failure). Two patients died due to cardiac problems and one case was due to pneumonia. There were 4 non-response (NR, decline in the HBV DNA less than 2 log10 copies/mL after 6 month therapy) patients in the HCC group. One patient switched to ETV-ADV combination therapy at 9 months and one patient switched to LAM-tenofovir (TDF) combination therapy at 15 months. The other 2 patients continued the LAM-ADV combination and achieved VR at 12 months and 42 months. Among 9 patients with suboptimal response (SR, decline in the HBV DNA more than 2 log10 copies/mL after 6 month therapy but detectable HBV DNA), 5 patients died and 3 patients achieved VR. One other patient continues combination therapy without VR.

Among non-HCC group, 3 patients were diagnosed with HCC during treatment. These patients already achieved VR before a diagnosis of HCC, and two of them were cirrhotic patients. Two patients were treated with TACE-RFA combination, one patient was treated with RFA alone. Among these, the one patient treated with TACE-RFA combination died due to hepatic failure caused by HCC progression. Among the 8 patients with NR, 2 patients switched to the ETV-ADV combination and 2 patients were lost to follow up. The other 4 patients continued LAM-ADV combination but did not achieve VR. There were 36 patients with SR, and 5 patients among these were lost to follow up, 2 patients switched to LAM-TDF combination, 3 patients switched to ETV-ADV combination and 1 patient stopped treatment due to pregnancy. The other 25 patients continued LAM-ADV combination and 13 patients among them achieved VR.


HBV infection is the one of the most common causes of the liver disease in Korea. Although the prevalence of chronic HBV infection is decreasing, it is still a major etiology of liver cirrhosis and HCC in Korea.20 LAM was used as a primary treatment for CHB patients before ETV and clevudine became available in Korea in 2007. Therefore, there are many patients who are still treated with LAM and some of them experience LAM resistance.

Many studies have suggested that LAM-ADV combination is superior to ADV monotherapy for the management of LAM resistant CHB patients. Fung et al10 revealed that patients with ADV resistance were more likely to have been switched from LAM to ADV monotherapy. Rapti et al11 studied the efficacy of ADV treatment in 42 HBeAg negative patients with CHB who had developed genotypical LAM resistance. The ADV resistance mutations occurred in 21% on ADV monotherapy 15 to 18 months from the start of treatment. Ijaz et al12 reported that combination therapy resulted in greater viraemia reduction than ADV monotherapy and no ADV-resistance developed during combination therapy. Vassiliadis et al13 also concluded that adding ADV to LAM is more effective than switching to ADV monotherapy in LAM resistant patients with HBeAg negative CHB. On the other hand, it is also accepted that LAM-ADV combination is superior to ETV monotherapy. Ryu et al14 compared ADV add-on LAM versus switching to ETV in 92 LAM resistant patients. The mean reduction from the baseline HBV DNA level was greater in the combination group at 12 months. Kim et al15 compared the cumulative efficacy and resistance of ETV monotherapy, ADV monotherapy and ADV add-on LAM combination therapy. After 6 month of rescue treatment, ADV add-on treatment suppressed HBV replication more effectively than ETV or ADV monotherapy. Additionally, no genotypic resistance was detected in the ADV add-on group.

The treatment strategies for LAM resistance are similar between AASLD guideline, EASL guideline. AASLD suggest LAM-ADV combination or LAM-TDF combination, and ETV monotherapy is not recommended.6 EASL also recommend a switch to TDF or add ADV.7 However, the long term follow-up data of this combination therapy is not enough. As previously described, Lampertico et al9 reported follow-up data of 145 LAM resistant patients with CHB who treated LAM-ADV combination up to 4 years.9 More recently, Shakado et al21 reported a result of 110 patients who received LAM for more than 12 months and 36 patients among these developed LAM resistance and received with ADV add-on treatment. The VR rates of this study were 47.2% at 1 year, 68.4% at 2 year and 90.9% at 3 year.21 Inoue et al22 reported 28 patients who received combination therapy and VR rates were 55.6% at 12 months, 80.0% at 24 months, 86.4% at 36 months, 92.3% at 48 months and 85.7% at 60 months. Korean patient data are limited to 1-2 year follow-up periods.14-16

All aforementioned studies excluded HCC patients. The LAM treatment was beneficial in patients with HBV-related HCC and its antiviral effect was comparable to that in CHB patients without HCC, it improved liver function and increased overall survival and tumor-free survival after curative surgery or RFA.23-26 Jin et al27 showed that first-line ETV monotherapy is comparably effective in CHB patients with and without HCC. However, there are no data of LMV-ADV for HBV related HCC patients, and the present study is the first report on our knowledge. In the current study, the VR rate and BR rate were comparable between the HCC group and the non-HCC group. Although median reduction of HBV DNA and BR rate at 12 months were lower in HCC group, this difference became insignificant after then. If we consider HCC patients were in advanced stage of liver disease and this lead to reduced immunity and poor general condition, it can be acceptable results. Furthermore, some of HCC patients were under treatment for HCC treatment such as TACE and this can be cause of elevated transaminase.

Three patients of Non-HCC group were diagnosed with HCC during treatment. All of them were in a VR state before HCC diagnosis and 2 of them were cirrhotic patients. Papatheodoridis et al showed that long-term nucleos(t)ide analogue therapy did not eliminate HCC risk and patients with cirrhosis had a high risk of HCC.28 Furthermore, it is well known that LAM resistance increase the risk of disease progression more than the wild type.29 Therefore, HCC surveillance has to be continued even when VR is achieved.

In conclusion, LAM and ADV combination therapy is an effective and safe treatment for LAM-resistant CHB patients irrespective of HCC. Although the treatment response is good, the needs of HCC surveillance are not diminished.


This research was supported by Basic Science Research Program through the National research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2012R1A1A1041337).


The authors have no conflicts to disclose.



The American Association for the Study of Liver Disease




biochemical response


Chronic hepatitis B


The European Association for the Study of the Liver




hepatitis B virus


Hepatocellular Carcinoma


The Korean Association for the Study of the Liver




polymerase chain reaction


restriction fragment mass polymorphism


virological breakthrough


virological response


1. Lavanchy D. Hepatitis B virus epidemiology, disease burden, treatment, and current and emerging prevention and control measures. J Viral Hepat 2004;11:97–107. 14996343.
2. Chen CJ, Yang HI, Su J, Jen CL, You SL, Lu SN, et al. Risk of hepatocellular carcinoma across a biological gradient of serum hepatitis B virus DNA level. JAMA 2006;295:65–73. 16391218.
3. Fattovich G, Bortolotti F, Donato F. Natural history of chronic hepatitis B: Special emphasis on disease progression and prognostic factors. J Hepatol 2008;48:335–352. 18096267.
4. Zoulim F. Hepatitis B virus resistance to antivirals: Clinical implications and management. J Hepatol 2003;39(Suppl 1):S133–S138. 14708691.
5. Lai CL, Dienstag J, Schiff E, Leung NW, Atkins M, Hunt C, et al. Prevalence and clinical correlates of YMDD variants during lamivudine therapy for patients with chronic hepatitis B. Clin Infect Dis 2003;36:687–696. 12627352.
6. Lok AS, McMahon BJ. Chronic hepatitis B: Update 2009. Hepatology 2009;50:661–662. 19714720.
7. European Association For The Study Of The Liver. EASL clinical practice guidelines: Management of chronic hepatitis B virus infection. J Hepatol 2012;57:167–185. 22436845.
8. Korean Association for the Study of the Liver. KASL clinical practice guidelines: Management of chronic hepatitis B. Clin Mol Hepatol 2012;18:109–162. 22893865.
9. Lampertico P, Vigano M, Manenti E, Iavarone M, Sablon E, Colombo M. Low resistance to adefovir combined with lamivudine: A 3-year study of 145 lamivudine-resistant hepatitis B patients. Gastroenterology 2007;133:1445–1451. 17983801.
10. Fung SK, Chae HB, Fontana RJ, Conjeevaram H, Marrero J, Oberhelman K, et al. Virologic response and resistance to adefovir in patients with chronic hepatitis B. J Hepatol 2006;44:283–290. 16338024.
11. Rapti I, Dimou E, Mitsoula P, Hadziyannis SJ. Adding-on versus switching-to adefovir therapy in lamivudine-resistant HBeAg-negative chronic hepatitis B. Hepatology 2007;45:307–313. 17256746.
12. Ijaz S, Arnold C, Dervisevic S, Mechurova J, Tatman N, Tedder RS, et al. Dynamics of lamivudine-resistant hepatitis B virus during adefovir monotherapy versus lamivudine plus adefovir combination therapy. J Med Virol 2008;80:1160–1170. 18461609.
13. Vassiliadis TG, Giouleme O, Koumerkeridis G, Koumaras H, Tziomalos K, Patsiaoura K, et al. Adefovir plus lamivudine are more effective than adefovir alone in lamivudine-resistant HBeAg-chronic hepatitis B patients: A 4-year study. J Gastroenterol Hepatol 2010;25:54–60. 19780875.
14. Ryu HJ, Lee JM, Ahn SH, Kim do Y, Lee MH, Han KH, et al. Efficacy of adefovir add-on lamivudine rescue therapy compared with switching to entecavir monotherapy in patients with lamivudine-resistant chronic hepatitis B. J Med Virol 2010;82:1835–1842. 20872709.
15. Kim HJ, Park JH, Park DI, Cho YK, Sohn CI, Jeon WK, et al. Rescue therapy for lamivudine-resistant chronic hepatitis B: Comparison between entecavir 1.0 mg monotherapy, adefovir monotherapy and adefovir add-on lamivudine combination therapy. J Gastroenterol Hepatol 2010;25:1374–1380. 20659226.
16. Chung GE, Kim W, Lee KL, Hwang SY, Lee JH, Kim HY, et al. Add-on adefovir is superior to a switch to entecavir as rescue therapy for lamivudine-resistant chronic hepatitis B. Dig Dis Sci 2011;56:2130–2136. 21253834.
17. Yeon JE, Yoo W, Hong SP, Chang YJ, Yu SK, Kim JH, et al. Resistance to adefovir dipivoxil in lamivudine resistant chronic hepatitis B patients treated with adefovir dipivoxil. Gut 2006;55:1488–1495. 16461777.
18. Llovet JM, Di Bisceglie AM, Bruix J, Kramer BS, Lencioni R, Zhu AX, et al. Design and endpoints of clinical trials in hepatocellular carcinoma. J Natl Cancer Inst 2008;100:698–711. 18477802.
19. Ueno S, Tanabe G, Nuruki K, Hamanoue M, Komorizono Y, Oketani M, et al. Prognostic performance of the new classification of primary liver cancer of japan (4th edition) for patients with hepatocellular carcinoma: A validation analysis. Hepatol Res 2002;24:395–403. 12479938.
20. Chae HB, Kim JH, Kim JK, Yim HJ. Current status of liver diseases in korea: Hepatitis B. Korean J Hepatol 2009;15(Suppl 6):S13–S24. 20037275.
21. Shakado S, Watanabe H, Tanaka T, Morihara D, Nishizawa S, Inomata S, et al. Combination therapy of lamivudine and adefovir in japanese patients with chronic hepatitis B. Hepatol Int 2008;2:361–369. 19669266.
22. Inoue J, Ueno Y, Wakui Y, Niitsuma H, Fukushima K, Yamagiwa Y, et al. Four-year study of lamivudine and adefovir combination therapy in lamivudine-resistant hepatitis B patients: Influence of hepatitis B virus genotype and resistance mutation pattern. J Viral Hepat 2011;18:206–215. 20367795.
23. Kubo S, Tanaka H, Takemura S, Yamamoto S, Hai S, Ichikawa T, et al. Effects of lamivudine on outcome after liver resection for hepatocellular carcinoma in patients with active replication of hepatitis B virus. Hepatol Res 2007;37:94–100. 17300703.
24. Li N, Lai EC, Shi J, Guo WX, Xue J, Huang B, et al. A comparative study of antiviral therapy after resection of hepatocellular carcinoma in the immune-active phase of hepatitis B virus infection. Ann Surg Oncol 2010;17:179–185. 19727956.
25. Yoshida H, Yoshida H, Goto E, Sato T, Ohki T, Masuzaki R, et al. Safety and efficacy of lamivudine after radiofrequency ablation in patients with hepatitis B virus-related hepatocellular carcinoma. Hepatol Int 2008;2:89–94. 19669283.
26. Kim JH, Park JW, Koh DW, Lee WJ, Kim CM. Efficacy of lamivudine on hepatitis B viral status and liver function in patients with hepatitis B virus-related hepatocellular carcinoma. Liver Int 2009;29:203–207. 18662281.
27. Jin YJ, Shim JH, Lee HC, Yoo DJ, Kim KM, Lim YS, et al. Suppressive effects of entecavir on hepatitis B virus and hepatocellular carcinoma. J Gastroenterol Hepatol 2011;26:1380–1388. 21884247.
28. Papatheodoridis GV, Manolakopoulos S, Touloumi G, Vourli G, Raptopoulou-Gigi M, Vafiadis-Zoumbouli I, et al. Greece cohort study. Virological suppression does not prevent the development of hepatocellular carcinoma in HBeAg-negative chronic hepatitis B patients with cirrhosis receiving oral antiviral(s) starting with lamivudine monotherapy: results of the nationwide HEPNET. Gut 2011;60:1109–1116. 21270118.
29. Liaw YF. Prevention and surveillance of hepatitis B virus-related hepatocellular carcinoma. Semin Liver Dis 2005;25(Suppl 1):40–47. 16103980.

Article information Continued

Funded by : Ministry of Education, Science and Technology
Award ID : 2012R1A1A1041337

Figure 1

The efficacy of combination therapy. (A) Median HBV DNA level. (B) Median reduction in HBV DNA. (C) VR rate. (D) BR rate.

Table 1.

Baseline characteristics of the subjects

Variables Total (n=104) Non-HCC (n=85) HCC (n=19) P-value
Male 66 (63.5%) 52 (61.2%) 14 (73.7%) 0.431
Age (yr)* <0.001
 ≤50 60 (57.7%) 56 (65.9%) 4 (21.1%)
 >50 44 (42.3%) 29 (34.1%) 15 (78.9%)
Cirrhosis 49 (47.1%) 30 (35.3%) 19 (100%) <0.001
HCC 19 (18.3%) 19 (100%)
HBeAg positive 65 (62.5%) 56 (61.2%) 9 (47.4%) 0.189
HBV DNA (log10 copies/mL)* 7.3 (4.8-9.0) 7.3 (4.8-9.0) 7.1 (5.1-8.0) 0.520
ALT (IU/L)* 79 (20-1840) 86 (20-1840) 55 (26-816) 0.161
Child-Pugh score 0.152
 A 100 (96.2%) 83 (97.6%) 17 (89.5%)
 B 4 (3.8%) 2 (2.4%) 2 (10.5%)
LAM resistance mutation 0.337
 M204I 45 (43.3%) 33 (38.8%) 12 (63.2%)
 M204V+L180M 22 (21.2%) 17 (20.0%) 5 (26.3%)
 M204I+L180M 23 (22.1%) 22 (25.9%) 1 (5.3%)
 M204V/I+L180M 9 (8.7%) 8 (9.4%) 1 (5.3%)
 M204V 2 (1.9%) 2 (2.4%) 0 (0%)
 M204V/I 2 (1.9%) 2 (2.4%) 0 (0%)
 L180M 1 (1.0%) 1 (1.2%) 0 (0%)
Duration of LAM (mon)* 23.0 (3-107) 23.5 (3-107) 23.0 (6-40) 0.334
Duration of combination treatment (mon)* 35.2 (5-63) 35.5 (5-63) 29.6 (8-62) 0.570
 0 4 (21.1%)
 A 9 (47.4%)
 B 6 (31.6%)
Modified UICC
 I 7 (36.8%)
 II 7 (36.8%)
 III 5 (26.3%)
First line HCC therapy
 RFA 1 (5.3%)
 Operation 1 (5.3%)
 TACE+RFA (or PEI) 9 (47.4%)
 TACE 8 (42.1%)

HBV, hepatitis B virus; ALT, alanine aminotransferase; MELD, model for end-stage liver disease; HCC, hepatocellular carcinoma; LAM, lamivudine; BCLC, Barcelona Clinic Liver Cancer; UICC, Union for International Cancer Control; RFA, radiofrequency ablation; TACE, transarterial chemoembolization; PEI, percutaneous ethanol injection.


Median (range).

Table 2.

Change in HBV DNA during combination therapy

Time Median HBV DNA (log10 copies/mL)
Median reduction of HBV DNA (log10 copies/mL)
Pre-combination 7.3 (4.8-8.9) 7.2 (5.2-8.1)
0 mon 7.3 (4.8-9.0) 7.1 (5.1-8.0)
3 mon 4.0 (0-7.7) 4.5 (2.5-5.9) 2.9 (-2.1-5.8) 2.8 (-0.1-4.6)
6 mon 2.7 (0-7.7) 3.8 (2.5-7.9) 3.4 (-0.4-7.6) 2.9 (-0.3-5.1)
12 mon 2.5 (0-5.7) 3.3 (2.1-4.5) 4.1 (1.5-8.1) 3.3 (1.6-5.1)
18 mon 2.5 (0-5.6) 2.7 (0-5.2) 4.7 (2.0-8.8) 4.0 (1.4-7.1)
24 mon 2.1 (0-5.0) 2.5 (0-4.2) 5.2 (2.1-8.9) 4.1 (2.4-7.3)
30 mon 2.1 (0-5.0) 2.1 (0-4.0) 5.2 (0.9-8.9) 4.4 (1.4-7.6)
36 mon 2.1 (0-4.0) 2.1 (0-4.0) 5.5 (2.0-8.8) 4.8 (2.2-7.6)
42 mon 2.1 (0-4.0) 2.1 (0-4.0) 5.8 (2.0-9.0) 5.4 (2.6-7.6)
48 mon 2.1 (0-4.0) 2.1 (0-3.0) 5.8 (2.0-8.3) 4.4 (3.0-7.6)

Median (confidence interval).

HBV, hepatitis B virus; HCC, hepatocellular carcinoma.

Table 3.

The treatment response to combination therapy

Time Virologic Response
Biochemical Response
Non-HCC HCC P-value Non-HCC HCC P-value
3 mon 24/80 (30.0%) 4/18 (30.0%) 0.578 43/80 (53.8%) 10/18 (55.6%) 1.000
6 mon 41/85 (48.2%) 6/19 (31.6%) 0.212 63/85 (74.1%) 13/19 (68.4%) 0.582
12 mon 45/81 (55.6%) 6/18 (33.3%) 0.119 68/81 (84.0%) 10/18 (55.6%) 0.021
18 mon 44/72 (61.1%) 5/13 (38.5%) 0.142 59/72 (81.9%) 10/13 (76.9%) 0.704
24 mon 45/67 (67.2%) 7/12 (58.3%) 0.742 57/68 (83.8%) 7/12 (58.3%) 0.057
30 mon 41/61 (67.2%) 6/10 (60.0%) 0.724 51/61 (83.6%) 7/10 (70.0%) 0.376
36 mon 37/53 (69.8%) 5/10 (50.0%) 0.280 42/54 (77.8%) 7/10 (70.0%) 0.687
42 mon 26/36 (63.0%) 6/8 (75.0%) 0.755 30/40 (75.0%) 4/8 (50.0%) 0.208
48 mon 22/31 (71.0%) 4/6 (66.7%) 1.000 25/31 (80.6%) 4/6 (66.7%) 0.591

HCC, hepatocellular carcinoma.