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Incidence of BM by Period of Diagnosis based on Detroit SEER databse, 1973–2011
| Yes (%) | No (%) | Total n | p Value | |
|---|---|---|---|---|
| NSCLC | ||||
| Dx Group (by year) | ||||
| 1973–1985 | 990 (11) | 8408 (89) | 9398 | <0.0001 |
| 1986–1998 | 1070 (10) | 9994 (90) | 11064 | |
| 1999–2011 | 652 (7) | 9332 (93) | 9984 | |
| SCLC | ||||
| Dx Group (by year) | ||||
| 1973–1985 | 202 (14) | 1211 (86) | 1413 | <0.0001 |
| 1986–1998 | 388 (23) | 1313 (77) | 1701 | |
| 1999–2011 | 170 (15) | 951 (85) | 1121 |
Abbreviations: NSCLC- non-small lung cancer; SCLC- small cell lung cancer; Dx- diagnosis;
