17 April 2021>: Clinical Research
Epidemiology of 631 Cases of COVID-19 Identified in Jiangsu Province Between January 1 and March 20 2020: Factors Associated with Disease Severity and Analysis of Zero Mortality
Hong Ji 1AE* , Qigang Dai 1AC* , Hui Jin 2C* , Ke Xu 1C , Jing Ai 1F , Xinyu Fang 3E , Naiyang Shi 2C , Haodi Huang 1D , Ying Wu 1B , Zhihang Peng 3B , Jianli Hu 1C , Liguo Zhu 1F , Changjun Bao 14A* , Ming Wu 15AG*DOI: 10.12659/MSM.929986
Med Sci Monit 2021; 27:e929986
Table 1 Transmission characteristics and key time intervals in 4 stages of confirmed COVID-19 cases reported in Jiangsu Province, Eastern China, by March 20, 2020 (n=631).
Stage | Stage 1 (n=21) | Stage 2 (n=236) | Stage 3 (n=236) | Stage 4 (n=138) | Total (n=631) |
---|---|---|---|---|---|
The first generation infectiona | 71.43% (15) | 64.41% (152) | 36.02% (85) | 18.12% (25) | 43.90% (277) |
The second generation infectionb | 23.81% (5) | 20.34% (48) | 28.39% (67) | 24.64% (34) | 24.41% (154) |
The third generation infectionc | 4.76% (1) | 14.83% (35) | 35.17% (83) | 55.80% (77) | 31.07% (196) |
Uncleard | 0.00% (0) | 0.42% (1) | 0.42% (1) | 1.45% (2) | 0.63% (4) |
Onset-to-diagnosis | 11.00 (10.00–12.50) | 8.00 (5.00–10.75) | 6.00 (4.00–10.00) | 5.00 (3.00–7.00) | 7.00 (4.00–10.00) |
Onset-to-first medical visit | 5.00 (3.00–7.00) | 2.00 (0.00–4.00) | 1.00 (0.00–3.75) | 1.00 (0.00–3.00) | 1.00 (0.00–4.00) |
Onset-to-hospitalization | 8.00 (6.50–9.00) | 5.00 (1.25–7.00) | 3.00 (0.00–5.00) | 1.00 (0.00–3.25) | 3.00 (1.00–6.00) |
a The first generation infection was defined as those who had the history of travel and residence of Wuhan city and surrounding areas or other communities with reported cases; b The second generation infection was defined as those who had contacted people from Wuhan city and surrounding areas or other communities with reported cases; c The third generation infection was defined as those who had contacted a locally confirmed or probable COVID-19 case; d Unclear defined as cases that did’t belong to the above three categories and whose exposure sources cannot be traced. |