TABLE 1.
SARS‐COV‐2 seroprevalence per 1000 donors (95% confidence intervals)
| N | + | Crude (unweighted) | Population weighted | Sensitivity & specificity | Fully adjusted | ||
|---|---|---|---|---|---|---|---|
| Total | 74 642 | 552 | 7.4 (6.8, 8.0) | 7.5 (6.9, 8.1) | 6.9 (6.2,7.0) | 7.0 (6.3, 7.6) | |
|
Region |
British Columbia | 10 309 | 62 | 6.0 (4.6, 7.7) | 6.1 (4.9, 7.6) | 5.4 (3.8, 7.0) | 5.6 (4.2, 6.9) |
| Alberta | 12 107 | 60 | 5.0 (3.8, 6.4) | 5.4 (4.1, 7.0) | 4.3 (2.9, 5.6) | 4.8 (3.3, 6.2) | |
| Prairies | 6505 | 40 | 6.1 (4.4, 8.4) | 6.2 (4.4, 8.4) | 5.6 (3.5, 7.6) | 5.6 (3.6, 7.6) | |
| Ontario | 37 928 | 355 | 9.4 (8.4, 10.4) | 9.2 (8.2, 10.2) | 9.0 (8.0, 10.1) | 8.8 (7.8, 9.8) | |
| Atlantic | 7793 | 35 | 4.5 (3.1, 6.2) | 5.2 (3.6, 7.3) | 3.8 (2.2, 5.4) | 4.5 (2.6, 6.4) | |
| Sex | Female | 35 547 | 256 | 7.2 (6.3, 8.1) | 7.2 (6.3, 8.1) | 6.7 (5.7, 7.6) | 6.7 (5.8, 7.5) |
| Male | 39 095 | 296 | 7.6 (6.7, 8.5) | 7.8 (6.9, 8.8) | 7.1 (6.2, 8.0) | 7.3 (6.4, 8.3) | |
| Age | 17‐24 | 7165 | 61 | 8.5 (6.5, 10.9) | 8.1 (6.4, 10.1) | 8.1 (5.8, 10.4) | 7.6 (5.7, 9.5) |
| 25‐34 | 15 254 | 127 | 8.3 (6.9, 9.9) | 8.5 (7.0, 10.3) | 7.9 (6.4, 9.5) | 8.1 (6.5, 9.8) | |
| 35‐44 | 12 286 | 72 | 5.9 (4.6, 7.4) | 6.2 (4.8, 7.9) | 5.2 (3.8, 6.7) | 5.6 (4.1, 7.2) | |
| 45‐54 | 13 339 | 101 | 7.6 (6.2, 9.2) | 7.3 (5.9, 8.9) | 7.1 (5.5, 8.7) | 6.8 (5.2, 8.3) | |
| 55‐64 | 16 753 | 117 | 7.0 (5.8, 8.4) | 6.9 (5.7, 8.2) | 6.5 (5.1, 7.8) | 6.4 (5.1, 7.7) | |
| 65+ | 9845 | 74 | 7.5 (5.9, 9.4) | 8.1 (6.6, 9.9) | 7.0 (5.2, 8.9) | 7.7 (6.0, 9.4) | |
|
Ethnicity |
White | 52 852 | 370 | 7.0 (6.3, 7.7) | 7.1 (6.4, 7.9) | 6.5 (5.7, 7.2) | 6.6 (5.9, 7.4) |
| Aboriginal | 778 | 6 | 7.7 (2.8, 16.7) | 9.6 (3.8, 19.1) | 7.2 (0.6, 13.9) | 9.3 (2.1, 16.5) | |
| Asian | 3098 | 33 | 10.7 (7.3, 14.9) | 9.7 (6.8, 13.7) | 10.4 (6.5, 14.3) | 9.3 (6.0, 12.7) | |
| Others | 6819 | 80 | 11.7 (9.3, 14.6) | 11.1 (8.8, 13.8) | 11.6 (8.8, 14.3) | 10.9 (8.4, 13.4) | |
| Missing | 11 095 | 63 | 5.7 (4.4, 7.3) | 6.0 (4.7, 7.5) | 5.1 (3.5, 6.6) | 5.4 (4.0, 6.8) | |
| Social deprivation index | 1 | 14 004 | 118 | 8.4 (7.0, 10.1) | 8.3 (6.9, 9.9) | 8.0 (6.4, 9.7) | 7.9 (6.4, 9.4) |
| 2 | 13 865 | 90 | 6.5 (5.2, 8.0) | 7.0 (5.8, 8.6) | 5.9 (4.5, 7.4) | 6.5 (5.1, 7.9) | |
| 3 | 13 151 | 95 | 7.2 (5.8, 8.8) | 7.5 (6.1, 9.2) | 6.7 (5.2, 8.3) | 7.1 (5.5, 8.6) | |
| 4 | 12 341 | 88 | 7.1 (5.7, 8.8) | 7.2 (5.8, 8.9) | 6.6 (5.0, 8.2) | 6.7 (5.2, 8.3) | |
| 5 | 13 170 | 101 | 7.7 (6.3, 9.3) | 7.5 (6.0, 9.2) | 7.2 (5.6, 8.8) | 7.0 (5.4, 8.6) | |
| Missing | 8111 | 60 | 7.4 (5.6, 9.5) | 7.0 (5.3, 9.0) | 6.9 (4.9, 8.9) | 6.5 (4.6, 8.4) | |
|
Material deprivation index |
1 | 19 633 | 136 | 6.9 (5.8, 8.2) | 7.1 (6.0, 8.5) | 6.4 (5.1, 7.7) | 6.6 (5.4, 7.9) |
| 2 | 16 457 | 97 | 5.9 (4.8, 7.2) | 5.8 (4.7, 7.1) | 5.3 (4.0, 6.5) | 5.2 (4.0, 6.5) | |
| 3 | 13 872 | 126 | 9.1 (7.6, 10.8) | 9.0 (7.5, 10.7) | 8.7 (7.0, 10.4) | 8.6 (7.0, 10.2) | |
| 4 | 10 460 | 77 | 7.4 (5.8, 9.2) | 8.3 (6.7, 10.2) | 6.9 (5.1, 8.6) | 7.9 (6.1, 9.6) | |
| 5 | 6109 | 56 | 9.2 (6.9, 11.9) | 8.4 (6.4, 10.9) | 8.8 (6.2, 11.4) | 8.0 (5.8, 10.3) | |
| Missing | 8111 | 60 | 7.4 (5.6, 9.5) | 7.0 (5.3, 9.0) | 6.9 (4.9, 8.9) | 6.5 (4.6, 8.4) | |
| Week 1–2 | May 9‐23 | 12 921 | 106 | 8.2 (6.7, 9.9) | 8.2 (6.7, 10.0) | 7.8 (6.1, 9.5) | 7.8 (6.2, 9.5) |
| Week 3–4 | May 24‐Jun 7 | 16 167 | 120 | 7.4 (6.2, 8.9) | 7.5 (6.2, 8.9) | 6.9 (5.5, 8.4) | 7.0 (5.6, 8.4) |
| Week 5–6 | Jun 8‐22 | 22 492 | 157 | 7.0 (5.9, 8.2) | 7.2 (6.2, 8.4) | 6.5 (5.3, 7.6) | 6.7 (5.6, 7.9) |
| Week 7‐8 | Jun 23‐Jul 7 | 18 068 | 126 | 7.0 (5.8, 8.3) | 7.0 (5.8, 8.3) | 6.5 (5.1, 7.8) | 6.4 (5.2, 7.7) |
| Week 9‐10 | Jul 8‐21 | 4994 | 43 | 8.6 (6.2, 11.6) | 8.6 (6.3, 11.4) | 8.2 (5.5, 11.0) | 8.2 (5.6, 10.8) |
| ABO groups | A | 25 715 | 181 | 7.0 (6.1, 8.1) | 6.8 (5.9, 7.9) | 6.5 (5.4, 7.6) | 6.3 (5.2, 7.4) |
| AB | 2964 | 26 | 8.8 (5.7 12.8) | 8.9 (5.8, 12.9) | 8.4 (4.8, 12.0) | 8.6 (4.9, 12.2) | |
| B | 8025 | 62 | 7.7 (5.9, 9.9) | 7.3 (5.6, 9.3) | 7.3 (5.2, 9.3) | 6.8 (4.8, 8.8) | |
| O | 37 936 | 283 | 7.5 (6.6, 8.4) | 7.8 (7.0, 8.8) | 7.0 (6.0, 7.9) | 7.4 (6.4, 8.3) |