Table 2.
Study Population, Cancer Cases and Person-years per 1,000 Medicare Beneficiaries
| 2004 | 2005 | 2006 | 2007 | 2008 | 2004 to 2008 | 2004 | 2005 | 2006 | 2007 | 2008 | 2004 to 2008 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| N | N | N | N | N | Change | Person-yrs | Person yrs | Person yrs | Person yrs | Person-yrs | Change | |
| 20% FFS sample (million)* | 5.41 | 5.37 | 5.21 | 5.10 | 5.02 | |||||||
| 6 cancer total† beneficiaries in year (1000s) | 126.7 | 127.1 | 125.8 | 124.9 | 123.7 | 80.3 | 80.8 | 81.0 | 81.0 | 80.9 | ||
| Cancer beneficiaries per 1,000 overall Medicare beneficiaries(% of 6 cancer total) | ||||||||||||
| Combined total | 23.4(100) | 23.6 (100) | 24.1 (100) | 24.5 (100) | 24.6 (100) | 5.1% | 14.8 (100) | 15.0 (100) | 15.5 (100) | 15.8 (100) | 16.1 (100) | 8.6% |
| Lung (% ) | 7.32 (31.3) | 7.42 (31.4) | 7.58 (31.4) | 7.76 (31.6) | 7.86 (31.9) | 7.3% | 3.98 (26.8) | 4.08 (27.2) | 4.25 (27.4) | 4.43 (28.0) | 4.54 (28.2) | 14.1% |
| Colon (%) | 7.40 (31.6) | 7.22 (30.6) | 7.20 (29.9) | 7.13 (29.1) | 6.98 (28.3) | −5.6% | 4.88 (32.9) | 4.78 (31.9) | 4.81 (29.1) | 4.77 (30.2) | 4.75 (29.4) | −2.8% |
| Lymphoma(%) | 4.60 (19.6) | 4.78 (20.2) | 5.04 (20.9) | 5.17 (21.1) | 5.24 (21.3) | 13.9% | 3.34 (22.5) | 3.46 (23.1) | 3.69 (23.8) | 3.81 (24.1) | 3.87 (24.0) | 16.0% |
| Head and Neck(%) | 1.86 (7.9) | 1.89 (8.0) | 1.89 (7.8) | 1.91 (7.8) | 1.95 (7.9) | 4.7% | 1.26 (8.5) | 1.28 (8.5) | 1.29 (8.3) | 1.30 (8.2) | 1.34 (8.3) | 6.5% |
| Malignant Melanoma (%) | 1.62 (6.9) | 1.69 (7.2) | 1.74 (7.2) | 1.83 (7.5) | 1.92 (7.8) | 18.2% | 1.03 (6.9) | 1.06 (7.1) | 1.11 (7.2) | 1.17 (7.4) | 1.22 (7.6) | 18.8% |
| Esophagus (%) | 0.62 (2.7) | 0.64 (2.7) | 0.67 (2.8) | 0.66 (0.27) | 0.68 (2.8) | 8.9% | 0.32 (2.3) | 0.36 (2.4) | 0.38 (2.4) | 0.38 (2.4) | 0.39 (2.4) | 11.3% |
20% FFS (fee-for service) Medicare sample. Number of beneficiaries (N), cancer cases, and person-years per 1,000 by cancer type from 2004 and 2008.
A beneficiary with cancer of a specific type per year was defined by having either: a) any admission with a primary diagnosis of one of the cancers types listed; or b) at least two non-hospital claims at least 7 days apart each with a primary diagnosis of one of the cancers listed within the 12 months of that year. For each cancer type, person-years per cancer type were determined by the time from the first to the last claim in any year that a beneficiary meets the above criteria for a cancer case.
Age, gender and ethnicity all changed by < 0.1 (or 0.1%) per year (see text)