Characteristic of COVID-19 cases in Hubei Province (n=67 706)
| Total (n (%)) | Before 10 January (n (%)) | 10–22 January (n (%)) | 23 January–6 February (n (%)) | 7 February–7 March (n (%)) | |
| No | 67 706 | 980 | 10 897 | 40 588 | 15 241 |
| Type | |||||
| Confirmed case | 48 944 (72.29) | 610 (62.24) | 7944 (72.9) | 30 262 (74.56) | 10 128 (66.45) |
| Clinically diagnosed cases | 18 762 (27.71) | 370 (37.76) | 2953 (27.1) | 10 326 (25.44) | 5113 (33.55) |
| Age | |||||
| 0~ | 619 (0.91) | 1 (0.1) | 16 (0.15) | 196 (0.48) | 406 (2.66) |
| 10~ | 662 (0.98) | 1 (0.1) | 37 (0.34) | 288 (0.71) | 336 (2.2) |
| 20~ | 4507 (6.66) | 36 (3.67) | 679 (6.23) | 2611 (6.43) | 1181 (7.75) |
| 30~ | 10 147 (14.99) | 86 (8.78) | 1661 (15.24) | 6182 (15.23) | 2218 (14.55) |
| 40~ | 12 009 (17.74) | 139 (14.18) | 1946 (17.86) | 7338 (18.08) | 2586 (16.97) |
| 50~ | 15 392 (22.73) | 254 (25.92) | 2636 (24.19) | 9444 (23.27) | 3058 (20.06) |
| 60~ | 14 563 (21.51) | 267 (27.24) | 2524 (23.16) | 8869 (21.85) | 2903 (19.05) |
| 70~ | 6884 (10.17) | 142 (14.49) | 1037 (9.52) | 4138 (10.2) | 1567 (10.28) |
| ≥80 | 2923 (4.32) | 54 (5.51) | 361 (3.31) | 1522 (3.75) | 986 (6.47) |
| Gender | |||||
| Male | 33 026 (48.78) | 492 (50.2) | 5298 (48.62) | 20 016 (49.32) | 7220 (47.37) |
| Female | 34 680 (51.22) | 488 (49.8) | 5599 (51.38) | 20 572 (50.68) | 8021 (52.63) |
| Occupation | |||||
| Service | 4775 (7.05) | 68 (6.94) | 880 (8.08) | 3100 (7.64) | 727 (4.77) |
| Farmer/worker | 10 483 (15.48) | 60 (6.12) | 1496 (13.73) | 6767 (16.67) | 2160 (14.17) |
| Medical personnel | 3019 (4.46) | 36 (3.67) | 745 (6.84) | 1763 (4.34) | 475 (3.12) |
| Retiree | 17 069 (25.21) | 325 (33.16) | 2880 (26.43) | 10 441 (25.72) | 3423 (22.46) |
| Others | 20 661 (30.52) | 337 (34.39) | 3431 (31.49) | 11 363 (28) | 5530 (36.28) |
| Unknown | 11 699 (17.28) | 154 (15.71) | 1465 (13.44) | 7154 (17.63) | 2926 (19.2) |
| Disease severity | |||||
| Mild | 31 098 (45.93) | 188 (19.18) | 3662 (33.61) | 20 145 (49.63) | 7103 (46.6) |
| Common | 23 414 (34.58) | 316 (32.24) | 4016 (36.85) | 12 803 (31.54) | 6279 (41.2) |
| Severe | 10 542 (15.57) | 257 (26.22) | 2497 (22.91) | 6256 (15.41) | 1532 (10.05) |
| Critical | 2195 (3.24) | 95 (9.69) | 560 (5.14) | 1264 (3.11) | 276 (1.81) |
| Missing value | 457 (0.67) | 124 (12.65) | 162 (1.49) | 120 (0.3) | 51 (0.33) |
| Days from illness to diagnosis | |||||
| <10 | 35 734 (52.78) | 0 (0) | 1816 (16.67) | 20 630 (50.83) | 13 288 (87.19) |
| 10~ | 23 787 (35.13) | 191 (19.49) | 4729 (43.4) | 16 998 (41.88) | 1869 (12.26) |
| 20~ | 6379 (9.42) | 165 (16.84) | 3531 (32.4) | 2599 (6.4) | 84 (0.55) |
| 30~ | 1440 (2.13) | 370 (37.76) | 730 (6.7) | 340 (0.84) | 0 (0) |
| ≥40 | 366 (0.54) | 254 (25.92) | 91 (0.84) | 21 (0.05) | 0 (0) |
| Close contacts | |||||
| Yes | 12 573 (18.57) | 112 (11.43) | 1382 (12.68) | 7430 (18.31) | 3649 (23.94) |
| No | 44 749 (66.09) | 741 (75.61) | 8052 (73.89) | 27 810 (68.52) | 8146 (53.45) |
| Missing value | 10 384 (15.34) | 127 (12.96) | 1463 (13.43) | 5348 (13.18) | 3446 (22.61) |
| Clustered cases | |||||
| Yes | 6872 (10.15) | 79 (8.06) | 1016 (9.32) | 4154 (10.23) | 1623 (10.65) |
| No | 38 834 (57.36) | 586 (59.8) | 6596 (60.53) | 24 005 (59.14) | 7647 (50.17) |
| Unknown | 11 625 (17.17) | 188 (19.18) | 1829 (16.78) | 7083 (17.45) | 2525 (16.57) |
| Missing value | 10 375 (15.32) | 127 (12.96) | 1456 (13.36) | 5346 (13.17) | 3446 (22.61) |
| Hubei Province* | |||||
| Wuhan | 49 912 (73.72) | 914 (93.27) | 7922 (72.7) | 28 508 (70.24) | 12 568 (82.46) |
| Adjacent Wuhan districts | 11 824 (17.46) | 43 (4.39) | 2074 (19.03) | 7870 (19.39) | 1837 (12.05) |
| Non-adjacent Wuhan districts | 5970 (8.82) | 23 (2.35) | 901 (8.27) | 4210 (10.37) | 836 (5.49) |
| Per capita GDP† | |||||
| Wuhan | 49 912 (73.72) | 914 (93.27) | 7922 (72.7) | 28 508 (70.24) | 12 568 (82.46) |
| High | 7051 (10.41) | 26 (2.65) | 1200 (11.01) | 4758 (11.72) | 1067 (7) |
| Low | 10 743 (15.87) | 40 (4.08) | 1775 (16.29) | 7322 (18.04) | 1606 (10.54) |
| Migration rate‡ | |||||
| Wuhan | 49 912 (73.72) | 914 (93.27) | 7922 (72.7) | 28 508 (70.24) | 12 568 (82.46) |
| High | 13 352 (19.72) | 50 (5.1) | 2302 (21.13) | 8988 (22.14) | 2012 (13.2) |
| Low | 4442 (6.56) | 16 (1.63) | 673 (6.18) | 3092 (7.62) | 661 (4.34) |
| Travel intensity§ | |||||
| Wuhan | 49 912 (73.72) | 914 (93.27) | 7922 (72.7) | 28 508 (70.24) | 12 568 (82.46) |
| High | 6305 (9.31) | 22 (2.24) | 1040 (9.54) | 4300 (10.59) | 943 (6.19) |
| Low | 11 489 (16.97) | 44 (4.49) | 1935 (17.76) | 7780 (19.17) | 1730 (11.35) |
*Adjacent Wuhan districts including Huangshi, Jingzhou, Ezhou, Huanggang, Xiaogan, Xianning and Xiantao, the rest were included in non-adjacent Wuhan districts.
†High per capita GDP districts of Hubei Province except for Wuhan including Yichang, Ezhou, Qianjiang, Xiangyang, Xiantao, Huangshi, Jingmen, Xianning, the rest were included in low group.
‡The migration rate is the mean of data from 1 to 23 January 2020. High migration rate districts of Hubei Province except for Wuhan, including Xiaogan, Huanggang, Jingzhou, Xianning, Ezhou, Xiangyang, Huangshi, Jingmen, the rest were included in low group.
§Travel intensity is the mean of data between 1 January 2020 and the date of blocking traffic connections. High travel intensity before the date of cordon sanitaire around the district except for Wuhan, including Xianning, Enshi Tujia and Miao, Huangshi, Yichang, Jingmen Tianmen, Shiyan, Xiangyang, the rest were included in low group.
GDP, gross domestic product.