Table 1.
Age-adjusted incidence rates of primary malignant spinal cord tumor patients by variables of interest diagnosed in 1973 to 2006.
| Variable of Interest | No. (%) | Incidence ratex | 95% CIxx |
|---|---|---|---|
| OVERALL | 988 (100) | 0.12 | (0.12,0.13) |
| Age at diagnosis | |||
| 0–9 | 91 (9.21) | 0.08 | (0.06, 0.09) |
| 10–19 | 110 (11.13) | 0.09 | (0.07,0.11) |
| 20–34 | 238 (24.09) | 0.12 | (0.11,0.14) |
| 35–49 | 278 (28.14) | 0.17 | (0.15,0.19) |
| 50–64 | 180 (18.22) | 0.16 | (0.13,0.18) |
| 65+ | 91 (9.21) | 0.10 | (0.08,0.12) |
| Sex | |||
| Male | 557 (56.38) | 0.14 | (0.13,0.16) |
| Female | 431 (43.62) | 0.11 | (0.10,0.12) |
| Race | |||
| White | 850 (86.03) | 0.13 | (0.12,0.14) |
| Black | 86 (8.70) | 0.09 | (0.07,0.12) |
| Other* | 52 (5.26) | 0.07 | (0.06,0.10) |
| Histological type | |||
| Astrocytoma Grade I | 77 (7.79) | 0.009 | (0.007,0.01) |
| Astrocytoma Grade II | 31 (3.14) | 0.004 | (0.003,0.005) |
| Astrocytoma Grade II–III | 26 (2.63) | 0.003 | (0.002,0.005) |
| Astrocytoma Grade III | 38 (3.85) | 0.005 | (0.003,0.007) |
| GBM | 39 (3.95) | 0.005 | (0.003,0.007) |
| Astrocytoma, NOS | 228 (23.08) | 0.03 | (0.02,0.03) |
| Ependymoma | 549 (55.57) | 0.07 | (0.06,0.08) |
| Primary Site | |||
| C70.1-Spinal meninges | 6 (0.61) | 0.0008 | (0.0003,0.002) |
| C72.0-Spinal cord | 964 (97.57) | 0.12 | (0.11,0.13) |
| C72.1-Cauda equina | 18 (1.82) | 0.002 | (0.001,0.004) |
x
Incidence rates are per 100,000 and age-adjusted to the 2000 US Standard Population
xx
95% Confidence interval for incidence rate.
*
American Indian/AK Native, Asian/Pacific Islander