MM patient characteristics and incidence patterns
| . | Blacks . | Whites . | Black:white rate ratio . | ||
|---|---|---|---|---|---|
| n (%) . | Incidence (95% CI) . | n (%) . | Incidence (95% CI) . | ||
| Total | 5798 (100) | 11.0 (10.7-11.3) | 28 939 (100) | 4.9 (4.8-4.9) | 2.25 |
| Sex | |||||
| Male | 2883 (50) | 13.2 (12.7-13.7) | 15 255 (53) | 6.1 (6.0-6.2) | 2.16 |
| Female | 2915 (50) | 9.6 (9.2-9.9) | 13 684 (47) | 4.0 (3.9-4.1) | 2.40 |
| Year of MM diagnosis | |||||
| 1973-1979 | 744 (13) | 10.1 (9.3-10.9) | 4536 (15) | 4.5 (4.4-4.6) | 2.24 |
| 1980-1986 | 1048 (18) | 10.9 (10.3-11.7) | 5424 (19) | 4.7 (4.6-4.8) | 2.32 |
| 1987-1993 | 1244 (21) | 11.2 (10.5-11.8) | 6384 (22) | 5.0 (4.9-5.1) | 2.24 |
| 1994-1998 | 1097 (19) | 11.9 (11.2-12.7) | 5074 (18) | 5.1 (5.0-5.3) | 2.33 |
| 1999-2005 | 1665 (29) | 11.0 (10.5-11.6) | 7521 (26) | 5.0 (4.9-5.1) | 2.20 |
| Age, y | |||||
| < 50 | 633 (11) | 1.2 (1.1-1.3) | 1629 (5) | 0.4 (0.4-0.4) | 3.00 |
| 50-69 | 2787 (48) | 24.0 (23.1-24.8) | 11 490 (40) | 9.7 (9.5-9.9) | 2.47 |
| ≥ 70 | 2378 (41) | 62.2 (59.7-64.7) | 15 820 (55) | 30.4 (29.9-30.8) | 2.05 |
| Median age, y (interquartile range) | 66 (56-74) | 70 (61-78) | |||
| . | Blacks . | Whites . | Black:white rate ratio . | ||
|---|---|---|---|---|---|
| n (%) . | Incidence (95% CI) . | n (%) . | Incidence (95% CI) . | ||
| Total | 5798 (100) | 11.0 (10.7-11.3) | 28 939 (100) | 4.9 (4.8-4.9) | 2.25 |
| Sex | |||||
| Male | 2883 (50) | 13.2 (12.7-13.7) | 15 255 (53) | 6.1 (6.0-6.2) | 2.16 |
| Female | 2915 (50) | 9.6 (9.2-9.9) | 13 684 (47) | 4.0 (3.9-4.1) | 2.40 |
| Year of MM diagnosis | |||||
| 1973-1979 | 744 (13) | 10.1 (9.3-10.9) | 4536 (15) | 4.5 (4.4-4.6) | 2.24 |
| 1980-1986 | 1048 (18) | 10.9 (10.3-11.7) | 5424 (19) | 4.7 (4.6-4.8) | 2.32 |
| 1987-1993 | 1244 (21) | 11.2 (10.5-11.8) | 6384 (22) | 5.0 (4.9-5.1) | 2.24 |
| 1994-1998 | 1097 (19) | 11.9 (11.2-12.7) | 5074 (18) | 5.1 (5.0-5.3) | 2.33 |
| 1999-2005 | 1665 (29) | 11.0 (10.5-11.6) | 7521 (26) | 5.0 (4.9-5.1) | 2.20 |
| Age, y | |||||
| < 50 | 633 (11) | 1.2 (1.1-1.3) | 1629 (5) | 0.4 (0.4-0.4) | 3.00 |
| 50-69 | 2787 (48) | 24.0 (23.1-24.8) | 11 490 (40) | 9.7 (9.5-9.9) | 2.47 |
| ≥ 70 | 2378 (41) | 62.2 (59.7-64.7) | 15 820 (55) | 30.4 (29.9-30.8) | 2.05 |
| Median age, y (interquartile range) | 66 (56-74) | 70 (61-78) | |||
Patients diagnosed 1973-2005 (SEER-9). All incidence rates are per 100 000 person-years and adjusted using the 2000 US population standard. The present study defined multiple myeloma cases ICD-O-3 codes 9732/3, which includes only cases coded as MM. However, the annually published SEER Cancer Statistics Review uses the Site and Morphology code for “Myeloma,” which includes a biologically and clinically heterogeneous group of plasma cell disorders including MM, solitary plasmacytoma, and plasma cell leukemia.