TABLE 2.

Unadjusted Risks of Mortality for Patients with Type II Odontoid Fractures

	3-month Mortality % (95% CI)	1-year Mortality % (95% CI)
Overall	21 (15–28)	31 (24–39)
Age
65–74	6 (0–14)	21 (7–34)
75–84	18 (8–27)	29 (17–40)
≥85	34 (22–46)	41 (28–53)
Sex
Male	23 (13–32)	32 (22–43)
Female	20 (12–29)	31 (21–40)
Poly-trauma
Yes	23 (12–34)	32 (20–44)
No	20 (12–28)	31 (22–40)
Charlson comorbidity score
0	13 (3–23)	18 (7–29)
≥1	27 (17–36)	39 (28–49)
Missing	18 (4–32)	32 (15–49)
Treatment
Operative	11 (2–21)	21 (9–32)
Nonoperative	25 (17–33)	36 (27–45)
Halo	21 (6–37)	32 (15–49)
Collar	26 (17–36)	37 (27–47)

CI indicates confidence interval.