Impact of medical and surgical intervention on survival in patients with cholangiocarcinoma

Table 1 Definition of study groups n (%)

Total study population	n = 825
No treatment	497 (60.2)
Treatment groups
Chemotherapy	153 (18.5)
Chemoradiation	61 (7.4)
Surgery	114 (13.8)
Surgical subgroups
Surgery alone	69 (60.5)
Adjuvant radiation	4 (3.5)
Adjuvant chemotherapy	20 (17.5)
Adjuvant chemoradiation	21 (18.4)

The 825 patients included in this study were categorized by type of treatment received. Treatment groups were divided into chemotherapy, chemoradiation, and surgical groups. The surgical group was then subdivided into surgery alone, surgery with adjuvant chemotherapy, and surgery with adjuvant chemoradiation.