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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 2.

ORN risk index (and 95% CI) for the identified clusters with K = 6 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 273 2.9% (0.9%, 4.9%) 10 out of 86 11.6% (4.8%, 18.4%)
4 39 out of 318 12.3% (8.7%, 15.9%) 34 out of 144 23.6% (16.7%, 30.5%)
5 31 out of 118 26.3% (18.3%, 34.3%) 14 out of 47 29.8% (16.7%, 42.9%)
6 21 out of 82 25.6% (16.1%, 35.1%) 14 out of 48 29.2% (16.3%, 42.1%)

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