Table 1.
Characteristics of study participants with at least three BNT162b2 vaccine doses who were tested between 10 January and 13 March 2022. Data are number (%) of participants unless stated otherwise
| Characteristic | Vaccination status | Overall (n=97 499) | |
|---|---|---|---|
| Three doses (n=69 623) | Four doses (n=27 876) | ||
| Sex | |||
| Female | 37 777 (54.3%) | 15 583 (55.9%) | 53 360 (54.7%) |
| Male | 31 846 (45.7%) | 12 293 (44.1%) | 44 139 (45.3%) |
| Age (years) | |||
| Mean (standard deviation) | 70.1 (7.63) | 72.6 (8.66) | 70.8 (8.02) |
| Median (range) | 68.8 (60.0-104) | 71.2 (60.0-108) | 69.4 (60.0-108) |
| Socioeconomic status index (scale 1-10) | |||
| High (7-10) | 29 759 (42.7) | 10 723 (38.5) | 40 482 (41.5) |
| Middle (4-6) | 31 814 (45.7) | 13 243 (47.5) | 45 057 (46.2) |
| Low (1-3) | 8050 (11.6) | 3910 (14.0) | 11 960 (12.3) |
| Cardiovascular disease | |||
| No | 51 897 (74.5) | 19 807 (71.1) | 71 704 (73.5) |
| Yes | 17 726 (25.5) | 8069 (28.9) | 25 795 (26.5) |
| Diabetes mellitus | |||
| No | 53 004 (76.1) | 20 151 (72.3) | 73 155 (75.0) |
| Yes | 16 619 (23.9) | 7725 (27.7) | 24 344 (25.0) |
| Hypertension | |||
| No | 31 704 (45.5) | 11 034 (39.6) | 42 738 (43.8) |
| Yes | 37 919 (54.5) | 16 842 (60.4) | 54 761 (56.2) |
| Chronic kidney disease | |||
| No | 46 043 (66.1) | 16 366 (58.7) | 62 409 (64.0) |
| Yes | 23 580 (33.9) | 11 510 (41.3) | 35 090 (36.0) |
| Chronic obstructive pulmonary disease | |||
| No | 65 301 (93.8) | 25 929 (93.0) | 91 230 (93.6) |
| Yes | 4322 (6.2) | 1947 (7.0) | 6269 (6.4) |
| Obesity (body mass index ≥30) | |||
| No | 53 598 (77.0) | 20 904 (75.0) | 74 502 (76.4) |
| Yes | 16 025 (23.0) | 6972 (25.0) | 22 997 (23.6) |
| Immunosuppression | |||
| No | 60 690 (87.2) | 23 740 (85.2) | 84 430 (86.6) |
| Yes | 8933 (12.8) | 4136 (14.8) | 13 069 (13.4) |
| Assisted living | |||
| No | 68 892 (99.0) | 27 318 (98.0) | 96 210 (98.7) |
| Yes | 731 (1.0) | 558 (2.0) | 1289 (1.3) |
| Nursing home | |||
| No | 68 078 (97.8) | 26 182 (93.9) | 94 260 (96.7) |
| Yes | 1545 (2.2) | 1694 (6.1) | 3239 (3.3) |
| Test-taking behaviours (No of previous PCR tests) | |||
| 0 | 12 507 (18.0) | 4502 (16.2) | 17 009 (17.4) |
| 1-2 | 21 295 (30.6) | 7569 (27.2) | 28 864 (29.6) |
| ≥3 | 35 821 (51.4) | 15 805 (56.7) | 51 626 (53.0) |
| Third dose month | |||
| August 2021 | 64 172 (92.2) | 26 924 (96.6) | 91 096 (93.4) |
| September 2021 | 4407 (6.3) | 849 (3.0) | 5256 (5.4) |
| October 2021 | 995 (1.4) | 103 (0.4) | 1098 (1.1) |
| November 2021 | 49 (0.1) | 0 (0) | 49 (0.1) |
PCR=polymerase chain reaction.