An overview of colorectal cancer survival rates and prognosis in Asia

Table 1 Comparison of the results from different countries

Study	Population	Year	Prognostic factors (indicated by univariate method)	Independent prognostic factors (indicated by multivariate method)
Mehrkhani et al[35]	Iran	1999-2002	Age, TNM stage, T-status, nodal status, distant metastasis, grade, lymphatic and vascular invasion, presurgery CEA level > 5 ng/mL	Age, TNM stage, grade
Shiono et al[42]	Japan	1999-2002	Aerogenous spread with floating cancer cell clusters (ASFC) vascular invasion, lymphatic invasion, pleural invasion	Vascular invasion, aerogenous spread with floating cancer cell clusters (ASFC)
Moghimi-Dehkordi et al[21]	Iran	2002-2007	Type of first treatment, body mass index, marital status, tumor grade, extent of wall penetration, distant metastasis, regional lymph nodes metastasis, and pathologic stage of tumor	Tumor size, metastasis of tumor, body mass index, marital status, and grade of tumor
Al-Shamsi et al[45]	United Arab Emirates	1985-1998	Age, Type of operation, Type of resection, lymph node status, peritoneal spread, liver metastasis, Dukes’ staging, Lateral margins, Proximal and distal margins	Presence of lymph nodes and Duke staging
Moradi et al[36]	Iran	2000-2005	Age, sex, site of tumor, Type of tumor	-
Park et al[41]	Korea	1974-1993	Dukes’ stage, extent of bowel wall invasion, lymph node metastasis and number of involved lymph nodes, preoperative CEA level, histologic grade, and gross morphology of the tumor	Dukes’ stage, number of lymph node metastasis, CEA level, tumor location, gross morphology of tumor, depth of bowel wall invasion
Yeole et al[43]	India	1987–1991	Age, marital status, education, site (colon versus rectum), clinical extent of disease and treatment modality	Age group, site and clinical extent of disease emerged
Ghazali et al[24]	Malaysia	1996-2005	Age, sex, race, working status, smoking status, per rectal bleeding, liver metastasis, site of tumour, Dukes staging, preoperative CEA level and treatment modalities	Liver metastasis status, Dukes staging and treatment modalities
Goh et al[46]	Singapore	1987	Age, abdominal distension, Dukes’ stage , tumour grade	Dukes’ stage