Fig 1.
Patient selection process flowchart.
RT: radiotherapy.
Fig 2.
Changes in the proportions of irradiation methods (beam radiation, brachytherapy and combination of beam radiation with brachytherapy) over time periods in the primary RT group.
RT: radiotherapy.
Table 1.
Distribution of variables in the matched cohorts A (surgery alone vs. primary RT) and B (surgery plus adjuvant RT vs primary RT).
Fig 3.
Overall and disease-specific survival curves when comparing surgery alone vs. primary RT (A, B) and surgery plus adjuvant RT vs. primary RT (C, D). RT: radiotherapy; adj RT: adjuvant radiotherapy.
Table 2.
Prognostic factors associated with disease-specific survival in matched cohorts A (surgery alone vs. primary RT) and B (surgery plus adjuvant RT vs. primary RT).
Fig 4.
Hazard rate function plots of disease-specific mortality in the matched cohorts A (A) and B (B): surgery alone (blue) vs. primary RT (red) and surgery plus adjuvant RT (blue) vs. primary RT (red), respectively. RT: radiotherapy; adj RT: adjuvant RT.
Table 3.
Institutional analyses of primary RT for early-stage oral tongue squamous cell carcinoma.