Research Article
Epidemiology of C2 Fractures in the 21st Century: A National Registry Cohort Study of 6,370 Patients from 1997 to 2014
Table 2
Incidence of C2 fractures per 100,000 within age subgroups according to gender (presented with
values of
-test for gender difference).
| Age category
Years | Female
Per 100,000 | Male
Per 100,000 | Both sexes
Per 100,000 | -test
value |
| | 20–29 | 0.8 | 2.1 | 1.5 | <0.01 | | 30–39 | 0.5 | 1.4 | 1.0 | <0.01 | | 40–49 | 0.8 | 2.1 | 1.4 | <0.01 | | 50–59 | 1.7 | 3.0 | 2.4 | <0.01 | | 60–69 | 3.9 | 5.9 | 4.9 | <0.01 | | 70–79 | 9.2 | 13.6 | 11.2 | <0.01 | | 80–89 | 26.2 | 28.8 | 27.2 | 0.43 | | 90–99 | 49.7 | 55.2 | 51.1 | 0.46 |
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