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A total of 15 covariates were selected for analysis in this study, namely age, marital status, gender, race, AFP, radiotherapy, chemotherapy, systemic therapy, surgery, T stage, N stage, M stage, AJCC stage, tumor size and histologic grade. All patients were staged according to AJCC 8th edition. 

The patients were categorized into three groups based on the RX Summ–Surg Prim Site (1998+) field. These groups include: 
* 1) absence of surgery (A000); 
* 2) local destruction of tumor (A100-A170); 
* 3) liver resection or liver transplantation (A200-A750).

	a/README.md		b/README.md
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26	A total of 15 covariates were selected for analysis in this study, namely age, marital status, gender, race, AFP, radiotherapy, chemotherapy, systemic therapy, surgery, T stage, N stage, M stage, AJCC stage, tumor size and histologic grade. All patients were staged according to AJCC 8th edition.	26	A total of 15 covariates were selected for analysis in this study, namely age, marital status, gender, race, AFP, radiotherapy, chemotherapy, systemic therapy, surgery, T stage, N stage, M stage, AJCC stage, tumor size and histologic grade. All patients were staged according to AJCC 8th edition.
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28	The patients were categorized into three groups based on the RX Summ–Surg Prim Site (1998+) field. These groups include:	28	The patients were categorized into three groups based on the RX Summ–Surg Prim Site (1998+) field. These groups include:
29	1) absence of surgery (A000);	29	* 1) absence of surgery (A000);
30	2) local destruction of tumor (A100-A170);	30	* 2) local destruction of tumor (A100-A170);
31	3) liver resection or liver transplantation (A200-A750).	31	* 3) liver resection or liver transplantation (A200-A750).