| 分层 | 疫情前 | 疫情后 | p值 | ||||||
| 2016 (%) | 2017 (%) | 2018 (%) | 2019 (%) | 2016~2019 (%) | 2020 (%) | 2021 (%) | 2020~2021 (%) |
| |
| 低风险 | 1524 (51.6) | 660 (43.5) | 1696 (48.1) | 4111 (52.8) | 7991 (50.6) | 2136 (46.5) | 3126 (55.3) | 5262 (51.3) | p < 0.01 |
| 中风险 | 1143 (38.5) | 589 (38.9) | 1323 (37.5) | 2781 (35.7) | 5836 (37.0) | 1895 (41.3) | 2015 (35.6) | 3910 (38.2) | |
| 高风险 | 275 (9.3) | 245 (16.2) | 464 (13.2) | 852 (10.9) | 1836 (11.6) | 540 (11.8) | 500 (8.8) | 1040 (10.1) | |
| 极高风险 | 14 (0.5) | 22 (1.5) | 44 (1.2) | 47 (0.6) | 127 (0.8) | 21 (0.5) | 16 (0.3) | 37 (0.4) | |