Age | 1.00 | 0.997–1.010 | 0.227 |
Underlying disease | 1.19 | 0.853–1.660 | 0.306 |
Female | 2.23 | 1.700–2.930 | <0.0001 |
Age (years;IQR) | 54 (45.3–66) | 59 (42–77) | 48 (28–66) | <0.0001 |
0–10 | 2 (1.6) | 1 (0.8) | 12 (4) | 0.178 |
11–20 | 3 (2.5) | 6 (4.9) | 24 (8) | 0.081 |
21–30 | 7 (5.7) | 12 (4.9) | 55 (18.3) | 0.001 |
31–40 | 14 (11.5) | 10 (8.2) | 38 (12.6) | 0.444 |
41–50 | 18 (14.8) | 12 (9.8) | 39 (13.0) | 0.536 |
51–60 | 36 (29.5) | 10 (8.2) | 43 (14.3) | <0.0001 |
>61 | 42 (34.4) | 71 (58.2) | 90 (29.9) | <0.0001 |
Sex, n (%) | ||||
Male | 74 (60.7) | 65 (53.3) | 145 (48.2) | – |
Female | 48 (29.3) | 57 (46.7) | 156 (51.8) | – |
Presence of underlying disease | 59 (48.4) | 53 (43.4) | 96 (31.9) | 0.005 |
Unknown underlying disease | 0 (0) | 0 (0) | 17 (5.6) | – |
Taiwan | 15 min or more (conversing) | ○ (medical institution) | None (medical institution) | Jan – Apr 2020 | 0.8% | 0.7% | |
Singapore | 30 min (with patient) | ○ | - | Jan – Apr 2020 | - | 2.4% | |
Guangzhou, China | ○ | None (social life) | Jan – Mar 2020 | 3.7% | 3.5% | ||
Guangzhou, China | ○ | None (social life) | Before March 2020 | - | 4.4% | ||
Hubei Province, China | ○ | None (social life) | Jan – Feb 2020 | - | 6.5% | ||
Nagano, Japan | 15 min or more (contact) | ○ | None (social life) | Aug – Sep 2020 | - | 15.0% | |
Our study | Had prolonged contact | ○ | None (social life) | Mar – Jun 2020 | Period 1:13.3% | - | |
Fukui, Japan | 15 minutes or more (contact) | ○ | None (social life) | Jul – Sep 2020 |
Period 2:19.2% |
- |
1 |
No, n (%) | 65 (2.2) | 2866 | 6.76 | 4.66–9.80 | |
Yes, n (%) | 57 (13.3) | 372 | ||||
2 |
No, n (%) | 66 (1.1) | 6011 | 21.70 | 14.85–31.71 | |
Yes, n (%) | 56 (19.2) | 235 | ||||
3 |
No, n (%) | 147 (0.7) | 21596 | 36.90 | 29.04–46.91 | |
Yes, n (%) | 154 (20.0) | 613 |
Number of close contacts | 429 | 291 | 767 | – |
Positivity rate among close contacts, n (%) | 57 (13.3) | 56 (19.2) | 154 (20.0) | 0.009 |