Table 4.
Trends in Malignant Primary Spinal Tumor Annual Age-Adjusted Incidence Rates, Male and Female, United States, 1999–2007a
| Year | All Malignant Spinal Tumors | ||
|---|---|---|---|
| Count | Rateb (95% CI)c |
Percentage Change |
|
| 1999 | 531 | 0.21 (0.20–0.23) | |
| 2000 | 552 | 0.22 (0.20–0.24) | 4.8 |
| 2001 | 548 | 0.22 (0.20–0.23) | 0.0 |
| 2002 | 544 | 0.21 (0.19–0.23) | −4.5 |
| 2003 | 571 | 0.22 (0.20–0.24) | 4.8 |
| 2004 | 602 | 0.23 (0.21–0.25) | 4.5 |
| 2005 | 610 | 0.23 (0.21–0.25) | 0.0 |
| 2006 | 578 | 0.21 (0.20–0.23) | −8.7 |
| 2007 | 567 | 0.21 (0.19–0.23) | 0.0 |
| Annual percentage changed | 0.03 (−1.02–1.10) | ||
| Total percentage change | −2.66 | ||
a
Counts pertain to 89.4% of the US population covered by eligible cancer registries. Data from 8 central cancer registries are not included.
b
Rates are per 100,000 persons and age-adjusted to the 2000 US standard population (19 age groups; Census P25-1130).
c
Ninety-five percent confidence intervals (CIs) were calculated using the Tiwari modification.
d
Annual percent change was calculated using weighted least squares method.