Study participants | 640 | 234 | 299 | 107 |
Male | 249 (39) | 122 (52) | 91 (31) | 36 (34) |
Female | 389 (61) | 112 (48) | 207 (69) | 70 (66) |
Tested for SARS-CoV-2 | | | | |
Never | 308 (48) | 118 (50) | 147 (49) | 43 (40) |
Once | 173 (27) | 70 (30) | 73 (24) | 30 (28) |
Twice or more | 159 (25) | 46 (20) | 79 (26) | 34 (32) |
Confirmed SARS-CoV-2 infections (positive PCR or antibody test at any time during study period) n (%, 95% CI) | 24 (3.8, 2.4–5.5) | 8 (3.4, 1.5–6.6) | 10 (3.3, 1.6–6.1) | 6 (6.0, 2.1–11.8) |
No symptoms | 5 (21) | | 2 | 0 |
Mild symptoms, not hospitalised# | 12 (50) | 3 | 6 | 3 |
Moderate symptoms, not hospitalised¶ | 4 (17) | 1 | 1 | 2 |
Hospitalised+ | 3 (12) | 1 | 1 | 1 |
Very severe symptoms (ICU care, intubation or death) | 0 | 0 | 0 | 0 |
Incident infections reported during follow-up period | 8 | 4 | 1 | 3 |
Total follow-up time person-years | 249 | 96 | 103 | 50 |
Incidence rate infections per 100 person-years (95% CI) | 3.2 (1.6–6.4) | 4.2 (1.6–10.9) | 1.0 (0.1–6.8) | 6.0 (2.2-17.9) |
Shielding behaviour during the past 7 days during 37 weeks of follow-up§ % | | | | |
Did not leave the house | 10 (3–17) | 10 (1–20) | 9 (3–19) | 10 (3–19) |
Went for grocery shopping | 38 (22–46) | 18 (6–26) | 51 (24–66) | 42 (22–60) |
Went to workplace/schoolƒ | 37 (16–57) | 44 (8–75) | 31 (6–49) | 34 (19–46) |
Used public transportation | 13 (5–18) | 13 (0–21) | 13 (8–22) | 13 (5–21) |