Table 3. The fatality rates of omicron variant compared to delta variants.
| Variables | Delta | Omicron | Delta vs. Omicron | ||||
|---|---|---|---|---|---|---|---|
| Subtotal of inpatients & staff members, n (%) | Confirmed cases, n (attack rate, %) | Subtotal of inpatients & staff members, n (%) | Confirmed cases, n (attack rate, %) | Relative risk (95% CI) | Adjusted relative risk (95% CI) | ||
| Total | 101 (100) | 13 (12.9) | 193 (100) | 12 (6.2) | 0.83 (0.37–1.83) | 0.99 (0.44–2.26) | |
| Gender | |||||||
| Male | 61 (60.4) | 7 (11.5) | 72 (37.3) | 8 (11.1) | 1.09 (0.39–3.08) | 1.32 (0.46–3.81) | |
| Female | 40 (39.6) | 6 (15.0) | 121 (62.7) | 4 (3.3) | 0.58 (0.16–2.06) | 0.66 (0.18–2.47) | |
| Age, years | |||||||
| ≤59 | 10 (9.9) | 2 (20.0) | 45 (23.3) | 1 (2.2) | 0.48 (0.04–5.30) | 0.69 (0.06–8.27) | |
| 60–74 | 48 (47.5) | 4 (8.3) | 67 (34.7) | 4 (6.0) | 0.91 (0.22–3.68) | 1.16 (0.28–4.91) | |
| ≥75 | 43 (42.6) | 7 (16.3) | 81 (42.0) | 7 (8.6) | 0.83 (0.29–2.42) | 1.02 (0.33–3.08) | |
| Group | |||||||
| Inpatients | 88 (87.1) | 13 (14.8) | 116 (60.1) | 12 (10.3) | 0.87 (0.38–1.94) | 1.00 (0.44–2.28) | |
| Staff members | 13 (12.9) | 0 | 77 (39.9) | 0 | - | - | |
| Vaccination status | |||||||
| Unvaccinated | 28 (27.7) | 6 (21.4) | 21 (10.9) | 3 (14.3) | 0.74 (0.18–3.07) | 0.70 (0.16–2.95) | |
| First | 9 (8.9) | 0 | 5 (2.6) | 0 | - | - | |
| Second | 36 (35.6) | 5 (13.9) | 25 (13.0) | 2 (8.0) | 0.61 (0.12–3.20) | 0.49 (0.09–2.64) | |
| Third | 28 (27.7) | 2 (7.1) | 142 (73.6) | 7 (4.9) | 2.35 (0.49–11.4) | 2.12 (0.43–10.6) | |
CI, confidence interval.