Table 2.
Characteristics of Patients with Missing Registry Social Security Number (SSN) Prior to or Post LexisNexis Linkage, and Registry SSN Improvement after LexisNexis Linkage
| Demographic characteristics | Patients submitted for LexisNexis linkage, n (%) | Patients with missing registry SSN prior to LexisNexis linkage | Patients with missing registry SSN post LexisNexis linkage | Reduction of missing registry SSN | |||
|---|---|---|---|---|---|---|---|
| n | % | n | % | Absolute (%) | Relative (%) | ||
| Total | 1,396,078 (100) | 47,271 | 3.4 | 23,294 | 1.7 | 1.7 | 50.7 |
| Sex a | |||||||
| Male | 665,376 (47.7) | 22,409 | 3.4 | 10,342 | 1.6 | 1.8 | 54.0 |
| Female | 730,538 (52.3) | 24,846 | 3.4 | 12,946 | 1.8 | 1.6 | 47.9 |
| Age at LexisNexis linkage (y) | |||||||
| <60 | 241,203 (17.3) | 18,185 | 7.5 | 8,253 | 3.4 | 4.1 | 54.6 |
| 60–<70 | 292,091 (20.9) | 13,001 | 4.5 | 5,861 | 2.0 | 2.4 | 54.8 |
| 70–<80 | 355,974 (25.5) | 9,496 | 2.7 | 4,879 | 1.4 | 1.3 | 48.7 |
| 80–<90 | 283,022 (20.3) | 4,913 | 1.7 | 3,039 | 1.1 | 0.7 | 38.5 |
| ≥90 | 223,788 (16.0) | 1,676 | 0.8 | 1,262 | 0.6 | 0.2 | 25.3 |
| Race | |||||||
| White | 1,119,033 (80.2) | 27,499 | 2.5 | 11,222 | 1.0 | 1.5 | 59.3 |
| Black | 197,210 (14.1) | 9,771 | 5.0 | 6,210 | 3.2 | 1.8 | 36.4 |
| American Indian/Alaska Native | 2,203 (0.2) | 45 | 2.0 | 23 | 1.0 | 1.0 | 49.0 |
| Asian and Pacific Islander | 65,559 (4.7) | 6,756 | 10.3 | 4,175 | 6.4 | 3.9 | 38.2 |
| Unknown | 12,073 (0.9) | 3,200 | 26.5 | 1,664 | 13.8 | 12.7 | 48.0 |
| Ethnicity | |||||||
| Non-Hispanic | 1,266,467 (90.7) | 37,079 | 2.9 | 16,268 | 1.3 | 1.7 | 56.3 |
| Hispanic | 129,611 (9.3) | 10,192 | 7.9 | 7,026 | 5.4 | 2.4 | 31.0 |
| Birthplace | |||||||
| United States | 816,561 (58.5) | 5,612 | 0.7 | 2,366 | 0.3 | 0.4 | 58.0 |
| Outside the United States | 236,176 (16.9) | 17,097 | 7.2 | 13,760 | 5.8 | 1.4 | 19.5 |
| Unknown | 343,341 (24.6) | 24,562 | 7.2 | 7,168 | 2.1 | 5.1 | 70.8 |
| Census tract poverty level (%) | |||||||
| 0–<5 | 361,050 (25.9) | 8,279 | 2.3 | 2,714 | 0.8 | 1.5 | 67.2 |
| 5–<10 | 368,475 (26.4) | 10,469 | 2.8 | 4,111 | 1.1 | 1.7 | 60.6 |
| 10–<20 | 376,573 (27.0) | 14,204 | 3.8 | 7,394 | 2.0 | 1.8 | 48.0 |
| 20–100 | 286,121 (20.5) | 13,962 | 4.9 | 8,769 | 3.1 | 1.8 | 37.3 |
| Unknown | 3,859 (0.3) | 357 | 9.3 | 306 | 7.9 | 1.3 | 14.3 |
| Vital status | |||||||
| Deceased | 682,217 (48.9) | 5,940 | 0.9 | 5345 | 0.8 | 0.1 | 10.3 |
| Alive | 713,861 (51.1) | 41,331 | 5.8 | 17,949 | 2.5 | 3.3 | 56.6 |
SSN, Social Security number.
a
Patients with unknown sex are not shown in the table.