Table 2. HLA Mismatches in Biologically Related vs Unrelated Living Kidney Donor-Recipient Pairs.
| HLA type | No. (%) of donor-recipient pairs | P value | ||
|---|---|---|---|---|
| All (N = 72 980) | Not related (n = 29 806) | Related (n = 43 174) | ||
| Total | ||||
| 0 | 6064 (8) | 129 (0.4) | 5935 (14) | <.001 |
| 1 | 3824 (5) | 271 (0.9) | 3553 (8) | |
| 2 | 11 821 (16) | 1253 (4) | 10 568 (24) | |
| 3 | 19 928 (27) | 4151 (14) | 15 777 (37) | |
| 4 | 11 025 (15) | 8108 (27) | 2917 (7) | |
| 5 | 13 030 (18) | 10 112 (34) | 2918 (7) | |
| 6 | 7288 (10) | 5782 (19) | 1506 (3) | |
| HLA-A | ||||
| 0 | 16 463 (23) | 2651 (9) | 13 812 (32) | <.001 |
| 1 | 38 494 (53) | 13 204 (44) | 25 290 (59) | |
| 2 | 18 023 (25) | 13 951 (47) | 4072 (9) | |
| HLA-B | ||||
| 0 | 11 169 (15) | 940 (3) | 10 229 (24) | <.001 |
| 1 | 36 160 (50) | 9043 (30) | 27 117 (63) | |
| 2 | 25 651 (35) | 19 823 (67) | 5828 (14) | |
| HLA-DR | ||||
| 0 | 14 661 (20) | 1988 (7) | 12 673 (29) | <.001 |
| 1 | 38 412 (53) | 12 517 (42) | 25 895 (60) | |
| 2 | 19 907 (27) | 15 301 (51) | 4606 (11) | |