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. Author manuscript; available in PMC: 2024 Aug 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2024 Mar 10;119(5):1569–1578. doi: 10.1016/j.ijrobp.2024.02.021

Table 1.

ORN risk index (and 95% CI) for the identified clusters with K = 5 per PDE status

Cluster no. PDE = 0 PDE = 1
ORN incidence Risk index (95% CI) ORN incidence Risk index (95% CI)
1 0 out of 58 0.0% 0 out of 9 0.0%
2 2 out of 68 2.9% (0.0%, 6.9%) 0 out of 8 0.0%
3 8 out of 271 3.0% (1.0%, 5.0%) 9 out of 83 10.8% (4.1%, 17.5%)
4 41 out of 321 12.8% (9.1%, 16.5%) 37 out of 152 24.3% (17.5%, 31.1%)
5 50 out of 199 25.1% (19.1%, 31.1%) 26 out of 90 28.9% (19.5%, 38.3%)

Abbreviations: ORN = osteoradionecrosis; PDE = preradiation dental extraction (0 = no/edentulous, 1 = dental extractions).