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Table 1 Characteristics of the imported and indigenous cases with COVID-19

From: Epidemiological and clinical characteristics of imported cases of COVID-19: a multicenter study

  All case
(N = 478)
Imported
(N = 165)
Indigenous
(N = 313)
Statistic value P
Male (%) 238(49.8) 98(59.4) 140(44.7) 9.295 0.002
Age group     2.713 0.258
 Median (range),y 46(1–94) 44(1–89) 47(1–94)   
  ≤ 18 32(6.7) 9(5.5) 23(7.3)   
 19–64 358(74.9) 131(79.4) 227(72.5)   
  ≥ 65 88(18.4) 25(15.2) 63(20.1)   
City     18.564 < 0.001
 Beijing 299(62.6) 123(74.5) 176(56.2)   
 Chongqing 140(29.3) 33(20.0) 107(34.2)   
 Jinan 15(3.1) 6(3.6) 9(2.9)   
 Nanning 24(5.0) 3(1.8) 21(6.7)   
Spectrum of Disease     10.149 0.006
 Asymptomatic 48(10) 8(4.8) 40(12.8)   
 Mild 347(72.6) 133(80.6) 214(68.4)   
 Severe 83(17.4) 24(14.5) 59(18.8)   
Symptoms      
 Fever 333(69.7) 136(82.4) 197(62.9) 19.411 < 0.001
 Highest temperature    23.665 < 0.001
  < 37.3 145(30.3) 29(17.6) 116(37.1)   
 37.3–38.0 177(37.0) 74(44.8) 103(32.9)   
 38.1–39.0 142(29.7) 53(32.19) 89(28.4)   
  > 39.0 14(2.9) 9(5.5) 5(1.6)   
 Cough 227(47.5) 75(45.5) 152(48.6) 0.418 0.518
 Fatigue 117(24.5) 45(27.3) 72(23.0) 1.065 0.302
 Dyspnoea 40(8.4) 11(6.7) 29(9.3) 0.951 0.329
 Headache 38(7.9) 12(7.3) 26(8.3) 0.158 0.691
 Respiratory ratea 20.4 ± 7.2 19.6 ± 3.3 20.9 ± 8.6 −2.322 0.021
Cluster cases 328(68.6) 83(50.3) 245(78.3) 39.258 < 0.001
 Family 254(53.1) 66(40.0) 188(60.1)   
 Other 74(15.5) 17(10.3) 57(18.2)   
History of Contact 435(91.0) 165(100.0) 270(86.3) 24.908 < 0.001
 Have been to Wuhan in 14 days 136(28.5) 136(82.4) 0(0.0) 360.580 < 0.001
 Have contacted the confirmed case in 14 days 285(59.6) 30(18.2) 255(81.5) 179.761 < 0.001
Outcomes     29.168 < 0.001
 Hospitalized 276(58.8) 68(41.2) 208(66.5)   
 Discharged 198(41.4) 96(58.2) 102(32.6)   
 Death 4(0.8) 1(0.6) 3(1.0)   
  1. a Mann-Whitney U test