Table 1. Trends in Baseline Demographic and Pathological Characteristics of the Study Population (1973-2010).
| Variable | Total | 1970s | 1980s | 1990s | 2000s |
|---|---|---|---|---|---|
| No. of patients (n)* | 63,297 | 1,235 | 2,966 | 8,799 | 50,297 |
| Median age (years) | 65 | 66 | 66 | 66 | 62 |
| Gender, n (%)* | |||||
| Women | 15,951 (25.2) | 338 (27.4) | 860 (29.0) | 2,449 (27.8) | 12,122 (24.1) |
| Men | 47,346 (74.8) | 897 (72.6) | 2,106 (71.0) | 6,350 (72.2) | 38,175 (75.9) |
| Race, n (%)* | |||||
| White | 41,396 (65.4) | 823 (66.6) | 1,852 (62.4) | 5,259 (59.8) | 33,699 (67.0) |
| Black | 7,722 (12.2) | 165 (13.4) | 372 (12.5) | 960 (10.9) | 6,287 (12.5) |
| Asian/Pacific Islander | 13,292 (21.0) | 241 (19.5) | 715 (24.1) | 2,479 (28.2) | 9,506 (18.9) |
| American Indian/Alaskan Native | 696 (1.1) | 4 (0.3) | 24 (0.8) | 83 (0.9) | 553 (1.1) |
| SEER historic stage, n (%)* | |||||
| Localized | 26,268 (41.5) | 288 (23.3) | 701 (23.6) | 2,750 (31.3) | 23,237 (46.2) |
| Regional | 16,647 (26.3) | 288 (23.3) | 716 (24.1) | 2,278 (25.9) | 13,429 (26.7) |
| Distant | 11,077 (17.5) | 372 (30.1) | 713 (24.0) | 1,728 (19.6) | 7,997 (15.9) |
| Unstaged | 9,368 (14.8) | 287 (23.2) | 836 (28.2) | 2,043 (23.2) | 5,633 (11.2) |
| Grade, n (%)* | |||||
| Well differentiated | 8,355 (13.2) | 76 (6.2) | 294 (9.9) | 1,152 (13.1) | 6,891 (13.7) |
| Moderately differentiated | 8,798 (13.9) | 55 (4.5) | 152 (5.1) | 936 (10.6) | 7,947 (15.8) |
| Poorly differentiated | 5,443 (8.6) | 84 (6.8) | 194 (6.5) | 803 (9.1) | 4,376 (8.7) |
| Undifferentiated | 696 (1.1) | 35 (2.8) | 38 (1.3) | 129 (1.5) | 453 (0.9) |
| Unknown | 40,067 (63.3) | 985 (79.8) | 2,288 (77.1) | 5,779 (65.7) | 30,631 (60.9) |
*
Significant at P < 0.05.