Table 2.
Clinical characteristics of symptomatic cases of COVID-19 in Sichuan province
| Subgroup | Symptomatic cases (N = 86,384) | No. of symptoms (mean, days) | Clinical durationa | Clinical Severity | ||
|---|---|---|---|---|---|---|
| (M-IQR, days) | Light/Medium (n,%) (N1 = 39,268) | Severe (n,%) (N2 = 47,116) | p-value$ | |||
| Sex | ||||||
| Male | 34,194 | 6 | 9 (6 ~ 14) | 18,528 (54.18) | 15,666 (45.82) | < 0.001 |
| Female | 52,190 | 7 | 12 (7 ~ 17) | 20,740 (39.74) | 31,450 (60.26) | |
| Age group, years | ||||||
| 0 ~ 6 | 573 | 6 | 6 (3 ~ 9) | 461 (80.45) | 112 (19.55) | < 0.001 |
| 7 ~ 12 | 1328 | 3 | 6 (3 ~ 10) | 1118 (84.19) | 210 (15.81) | |
| 13 ~ 25 | 9933 | 4 | 9 (6 ~ 13) | 6293 (63.35) | 3640 (36.65) | |
| 26 ~ 50 | 53,476 | 6 | 11 (7 ~ 16) | 23,394 (43.75) | 30,082 (56.25) | |
| 51 ~ 64 | 17,127 | 6 | 12 (8 ~ 17) | 6748 (39.4) | 10,379 (60.6) | |
| 65~ | 3947 | 6 | 13 (9 ~ 19) | 1254 (31.77) | 2693 (68.23) | |
| Underlying conditions | ||||||
| Without chronical diseases | 68,838 | 6 | 10 (7 ~ 15) | 32,942 (47.85) | 35,896 (52.15) | < 0.001 |
| With chronical diseases | 17,546 | 6 | 12 (8 ~ 17) | 6326 (36.05) | 11,220 (63.95) | |
| Vaccination status | ||||||
| Unvaccinated | 2122 | 6 | 12 (7 ~ 17) | 761 (35.86) | 1361 (64.14) | < 0.001 |
| 1 ~ 2does | 12,418 | 6 | 9 (6 ~ 15) | 6389 (51.45) | 6029 (48.55) | |
| 3 does | 71,073 | 6 | 11 (7 ~ 16) | 31,721 (44.63) | 39,352 (55.37) | |
| 4 does | 771 | 6 | 10 (6 ~ 14.25) | 397 (51.49) | 374 (48.51) | |
| Current smoker | ||||||
| Yes | 11,873 | 5 | 8 (5 ~ 13) | 7556 (63.64) | 4317 (36.36) | < 0.001 |
| No | 74,511 | 6 | 11 (7 ~ 16) | 31,712 (42.56) | 42,799 (57.44) | |
$ Differences in the proportion of different clinical outcomes were analyzed using the Chi-square and trend chi-square tests
aClinical duration refers to symptom duration, which indicates symptomatic cases that have already recovered. However, 58,917 cases were involved in the clinical duration analysis