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. Author manuscript; available in PMC: 2022 Apr 5.
Published in final edited form as: Oral Oncol. 2020 May 30;108:104819. doi: 10.1016/j.oraloncology.2020.104819

Table 4.

Adjusted Hazard Ratio and unadjusted Restricted Mean Survival Time for post-operative adjuvant radiotherapy initiation time and duration of radiation therapy.

PORT Initiation Time(Days) Duration of Radiation Therapy(Days) HR(95% CI) RMST(95% CI)
<42 <55 1 4.31 (4.28, 4.33)
<42 55–64 1.21 (1.07, 1.37) 4.08 (4.02, 4.14)
<42 64+ 1.39 (1.20, 1.62) 3.82 (3.73, 3.91)
42 to 48 <55 1.07 (0.99, 1.17) 4.10 (4.06, 4.14)
42 to 48 55–64 1.36 (1.14, 1.61) 4.00 (3.90, 4.11)
42 to 48 64+ 1.40 (1.13, 1.74) 3.71 (3.55, 3.87)
49+ <55 1.17 (1.09, 1.25) 3.95 (3.92, 3.98)
49+ 55–64 1.49 (1.35, 1.66) 3.71 (3.64, 3.77)
49+ 64+ 1.84 (1.62, 2.09) 3.47 (3.38, 3.57)

PORT: Post-Operative Adjuvant Radiation Time; HR: Hazard Ratio; CI: Confidence Interval; RMST: Restricted Mean Survival Time