Table 1.
Characteristics of the study participants by period
|
Entire
period |
Omicron sublineage period | P-value | ||
|
| ||||
| BA.1/BA.2 | BA.5 | |||
| n = 69,827 | n = 25,264 | n = 44,563 | ||
| Gender: male (%) | 47.2% | 47.2% | 47.2% | 0.969a |
| Age | ||||
| Aged 65 and older (%) | 14.9% | 13.6% | 15.6% | <0.001a |
| Average (SD) | 42.3 (19.9) | 40.9 (19.7) | 43.2 (20.0) | <0.001b |
| Number of aggravation risk factors | <0.001a | |||
| None | 71.8% | 73.8% | 70.7% | |
| One | 19.1% | 19.9% | 18.7% | |
| Two or more | 9.0% | 6.2% | 10.6% | |
| No. of hospital beds per 10,000 population | 0.523a | |||
| 1st quartile group (<80) | 23.9% | 24.2% | 23.7% | |
| 2nd quartile group (80–90) | 29.3% | 29.1% | 29.4% | |
| 3rd quartile group (95–150) | 16.9% | 16.9% | 16.9% | |
| 4th quartile group (>150) | 29.9% | 29.9% | 30.0% | |
SD: standard deviation.
aP-value based on the chi-squared test. bP-value based on the t test.